 Patent Application Title |
Patent App Num. |
Date |
 Power consumption measuring device | 20130147492 | 20130613 |
 A power consumption measuring device includes an analog-to-digital converter and an arithmetic unit and serves to convert a current signal supplied to a load into a measurement digital signal by the analog-to-digital converter, send the measurement digital signal to the arithmetic unit for measuring a power consumption level of the load. The power consumption measuring device is characterized in that: the arithmetic unit selects a current gain value and a correction compensation value based on a current range into which the measurement digital signal falls and adapted to adjust a gain value of the analog-to-digital converter for reducing an error rate and enhancing accuracy of the next measurement digital signal.
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| Supporting voice for flexible bandwidth systems | 20130148520 | 20130613 |
 Methods, systems, and devices for supporting voice communications in a wireless communications system are provided. Some embodiments utilize multiple code channels to transmit the voice frames. These embodiments include parallel multi-code embodiments, offset multi-code embodiments, and multi-user multi-code embodiments. Some embodiments utilize flexible carrier bandwidths systems that may utilize portions of spectrum that may not be big enough to fit a normal bandwidth waveform. Some embodiments transmit and receive a subset of subframes of voice frames received over flexible bandwidth code channels. In some embodiments, a subset of subframes based on a flexible bandwidth scaling factor of one or more flexible bandwidth code channels is transmitted. The receiver may decode the voice frame based on the received subset of subframes. An outer loop power control set-point... |
| Limiting certain processing activities as error rate probability rises | 20130151891 | 20130613 |
 A data processing apparatus configured to operate in a voltage and frequency operating region that is located beyond a safe region where errors do not arise, but within operating region limits such that the errors are rare. The data processing apparatus comprises: error detection circuitry and error recovery circuitry; the error detection circuitry being configured to determine if a signal sampled in the processing apparatus changes within a time window occurring after the signal has been sampled and during a same clock cycle as the sampling and to signal an error if the signal does change. The data processing apparatus further comprises performance control circuitry configured to determine when the data processing apparatus is operating close to the operating region limits where an error rate is... |
| Reduction in decoder loop iterations | 20130151911 | 20130613 |
 An embodiment of a method for decoding is disclosed. For this embodiment of the method, a decoder is limited to a set number of iterations for a decoding sequence. The set number of iterations is selected to be less than an optimal number of iterations for an optimal bit error rate (“BER”) resulting in a BER penalty. Inner loop decoding operations are performed within the decoder for the set number of iterations. Reliability information is output from the decoder to a data slicer. A symbol stream is output from the data slicer responsive to the reliability information.
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| Data collection and analysis for adaptive user interfaces | 20130152002 | 20130613 |
 The present invention provides systems and methods for utilizing sensors of human physical features, ambient conditions, and interfacial behavior for adaptive and friendlier user interfaces for computer applications and communication environments. A user's physical characteristics, for example, age, gender, ergonometric structure and user's interfacial behavior, for example, typing speed, typing error rate and distance from the screen are used to adapt to the user needs and provide more appropriate and fitting interface. In addition, ambient conditions may be considered within the adaptation process.
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| Bounded uncorrelated signal impairment deconvolution for total signal impairment extrapolation | 20130142242 | 20130606 |
| Methods and systems are described for analyzing signal impairments using a test and measurement instrument. A method may include decomposing aggregate signal impairments into signal impairments that are correlated and uncorrelated to an acquired data pattern. The uncorrelated signal impairments may be further decomposed into periodic signal impairments (e.g., PJ) and non-periodic uncorrelated signal impairments. A PDF of the non-periodic uncorrelated signal impairments may be mathematically integrated, thereby producing an estimated cumulative distribution function (CDF) curve. Random signal impairments may be estimated as an unbound Gaussian distribution. The CDF curve of the non-periodic uncorrelated signal impairments and the unbound Gaussian distribution may be plotted in Q-space on a display device. Non-periodic bounded uncorrelated signal impairments (e.g., NP-BUJ) PDF may then be isolated. Bounded uncorrelated signal impairments... |
| System and method for channel-adaptive antenna selection | 20130143506 | 20130606 |
| Systems and methods that provide channel-adaptive antenna selection in multi-antenna element communication systems are provided. In one embodiment, a method that selects a subset of receive antennas of a receiver to receive a transmitted RF signal may include, for example, one or more of the following: establishing possible subsets of the receive antennas; determining sets of channel parameter statistics corresponding to the possible subsets of the receive antennas; computing output bit error rates of the receiver, each output bit error rate being computed based on at least one set of channel parameter statistics; selecting a particular possible subset of the receive antennas based upon a criterion predicated on the computed output bit error rates; and connecting one or more RF chains of the receiver to the... |
| Material-loading control system and method | 20130144430 | 20130606 |
| A material-loading control system and method are disclosed for controlling a track conveyor on a production line through a control unit. When materials are to be loaded, production information is first obtained from a production management system, and information of a tray to be loaded, information of a feeder in which the tray is loaded, and information of a corresponding station are identified. The various information are compared with the production information obtained to see whether they are matched or not. If they are not matched, the control unit is instructed to power off the track conveyor to stop the operation of the track conveyor. In addition, during subsequent production process, if a material-tossing action is detected in the production line, then the control unit is... |
| Minimum error rate training with a large number of features for machine learning | 20130144593 | 20130606 |
| Systems, methods, and apparatuses including computer program products for machine learning. A method is provided that includes determining model parameters for a plurality of feature functions for a linear machine learning model, ranking the plurality of feature functions according to a quality criterion, and selecting, using the ranking, a group of feature functions from the plurality of feature functions to update with the determined model parameters.
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| System and method for link adaptation for variable link conditions | 20130136022 | 20130530 |
| Systems, apparatus, methods, and manufactures for performing link adaptation in a communications system are described. The methods may employ an error rate table that has a channel condition value dimension and a transmission parameter dimension. The elements of the error rate table include expected error rates for data transmitted at various channel conditions according to various transmission parameters. Also, the various transmission parameters may each be associated with a data transmission rate. For a given channel condition value, the methods may determine expected throughputs for each of the transmission parameters according to the associated expected error rates and data transmission rates. A transmission parameter may be selected according to the expected throughputs.
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| Predicting degradation of a communication channel below a threshold based on data transmission errors | 20130139011 | 20130530 |
| Applicants have discovered that error detection techniques, such as Forward Error Correction techniques, may be used to predict the degradation below a certain threshold of an ability to accurately convey information on a communication channel, for example, to predict a failure of the communication channel. In response, transmission and/or reception of information on the channel may be adapted, for example, to prevent the degradation below the threshold, e.g., prevent channel failure. Predicting the degradation may be based, at least in part, on data transmission error information corresponding to one or more blocks of information received on the channel and may include determining an error rate pattern over time. Based on these determinations, the degradation below the threshold may be predicted and the transmission and/or reception adapted.... |
| Apparatus and method for receiving signals | 20130128956 | 20130523 |
| A method of receiving a signal contains a first data stream at a first encoding rate and a second stream at a second encoding rate, outputting content from the first data stream if an error value of the first data stream is below a first error value, and outputting content from the second data stream if the error value of the first stream is above the first error value. An apparatus has a demodulator that receives a signal containing a first portion encoded at a first encoding rate and a second portion encoded at a second encoding rate, a controller that determines whether an error rate of a decoded first portion is above a first error rate, and an output driver that provides a video signal... |
| Simulation apparatus and simulation method | 20130132056 | 20130523 |
| A simulation apparatus includes a discrete events simulation section to perform a discrete type simulation of components of a configured model as defined based on attribute information that is information on parts of the components of the defined configured model and connection information showing a connectional relationship among the components of the defined configured model; and a soft error rate computation processing section to compute a soft error rate of the defined configured model based on the simulation result of the discrete events simulation section and data on soft error rates in the attribute information.
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| Increasing throughput by adaptively changing pdu size in wireless networks under low snr conditions | 20130121201 | 20130516 |
| Feedback indicates low signal-to-noise ratio (SNR) conditions for a wireless communications link between a transmitter device and a receiver device. After attempting to achieve a target packet error rate (PER) by increasing transmission power for the wireless communications link, the transmitter device receives feedback that indicates a current PER, for data transmitted using an initial automatic repeat request (ARQ) block size, is above the target PER for the receiver device, and changes, based on the feedback, the current ARQ block size to a different ARQ block size for the wireless communications link. The different ARQ block size may be adaptively selected to provide a maximum PDU size that achieves the target PER at the receiver device under the low SNR conditions.
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| Optimized finger assignment for improved multicarrier throughput | 20130121281 | 20130516 |
| Systems and methodologies are described that facilitate dynamically allocating demodulation resources of a wideband receiver to provide improved demodulation of simultaneously received signals. Signal-to-noise ratio (SNR) and/or packet error rate (PER) can be measured for the plurality of carriers to determine which demodulators related to the carriers require more resources than others to demodulate signals at a specified signal quality. Where the SNR of a related carrier is high and/or PER is low, the demodulator can require fewer resources than where the SNR of a related carrier is low and/or PER is high. In this regard, the resources are dynamically allocated among the demodulators and reallocated where SNR/PER changes and/or additional resources are made available.
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| Dynamic congestion control for power-blocking sectors in a radio telecommunication network | 20130107701 | 20130502 |
| A method and congestion controller for controlling congestion in a sector of a cellular telecommunication network that is limited by available downlink transmit power. The network includes a plurality of radio links between a radio base station and User Equipments (UEs) operating in the sector. The controller may first reduce the power of a first subset of the radio links by reducing the packet-switched (PS) downlink target Block Error Rate (BLER) Quality. If the congestion is not resolved within a defined time period, the power of a second subset of the radio links may be reduced by reducing the circuit-switched (CS) DL target BLER Quality. If reducing the PS and CS downlink target BLER Quality does not resolve the congestion, the invention may then implement an... |
| Synchronous clocking for optical orthogonal frequency division multiplexing transmission systems | 20130108271 | 20130502 |
| The present invention discloses a method for achieving optimised synchronous clock distribution of point-to-multipoint optical orthogonal frequency division multiplexed networks such that bandwidth sharing in both the time and frequency domain is possible without interference between users. The invention details how all clocked components in the network are synchronised such that no clock offset compensation is required anywhere in the network. Also the present invention discloses a method for optimisation of the synchronous clocking method to maximise the system bit error rate (BER) performance, furthermore the present invention discloses a method for implementing multiband-OOFDM where ONUs can easily select any OOFDM band for data reception providing network configuration flexibility.
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| Method of computing an effective bandwidth of a multimode fiber | 20130100437 | 20130425 |
| A method of assessing the power penalty at a given bit error rate of a multimode fiber including measuring a set of elementary fiber responses corresponding to different offset launches of light over the core radius into the multimode fiber, generating a global fiber response by applying, to the set of elementary fiber responses, a set of weighting coefficients and delays depending on the different offset launches of the elementary fiber responses, and computing a parameter representative of a fiber power penalty from the global fiber response, wherein the set of weighting coefficients includes several subsets of weighting coefficients time delayed relative to one another, wherein at least one relative time delay is not set to zero, and wherein weighting coefficients of each subset depend on... |
| Method and apparatus for regulating the sampling phase | 20130101075 | 20130425 |
| Embodiments of the invention relate to methods and circuits for controlling the sampling phase of a signal that is to be regenerated by sampling, particularly a serial communication signal, having method steps or means for oversampling the signal in order to ascertain samples of the signal during predetermined sampling phases, for determining differential errors between the samples during different instances of the predetermined sampling phases, for determining a differential error rate between the samples to at least one first and at least one second sampling phase on the basis of the ascertained differential errors, and for comparing at least two differential error rates based on at least two different sampling phase pairs in order to ascertain a decision concerning which of the predetermined sampling phases can... |
| Bit error rate impact reduction | 20130104012 | 20130425 |
| In an embodiment, a method includes receiving at a data interface a data stream having a plurality of logical communication channels. The data stream includes in succession a first data burst corresponding to one of the plurality of logical communication channels, a burst control word and a second data burst corresponding to the one or an other of the plurality of logical communication channels. The burst control word includes a first error check that protects the first data burst and the burst control word and a second error check that protects only the burst control word. The first error check and the second error check are examined. Only the one logical communication channel is errored out if the first error check is bad and the second... |
| Shifting cell voltage based on grouping of solid-state, non-volatile memory cells | 20130094290 | 20130418 |
| Cells of a solid-state, non-volatile memory are assigned to one of a plurality of groups. Each group is defined by expected symbols stored in the cells in view of actual symbols read from the cells. Based on cell counts within the groups, it can be determined that a shift in a reference voltage will reduce a collective bit error rate of the cells. The shift can be applied to data access operations affecting the cells.
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| Objective lens, optical pickup device, and optical disc device | 20130094339 | 20130418 |
| Provided is an objective lens including a diffraction portion provided on a laser beam incident plane or output plane. The diffraction portion includes first second, and third diffraction regions, wherein first laser beams corresponding to a first optical disc having a first transmissive layer are condensed on a data recording portion of the first optical disc, second laser beams corresponding to a second optical disc having a second transmissive layer thicker than the first transmissive layer are condensed on a data recording portion of the second optical disc, and third laser beams corresponding to a third optical disc having a third transmissive layer thicker than the second transmissive layer are condensed on a data recording portion of the third optical disc. An evaluation parameter calculated on... |
| System and method for modulation and coding scheme adaptation and power control in a relay network | 20130095748 | 20130418 |
| A method for determining a Modulation and Coding Scheme (MCS) and power control includes determining an error rate of a communication channel between the UA and at least one of the base station and the RN. When the error rate is below a first threshold, the method includes at least one of increasing the MCS, and reducing a transmission power of the UA. When the error rate is above a second threshold, the method includes at least one of decreasing the MCS, and increasing a transmission power of the UA.
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| Hardware execution driven application level derating calculation for soft error rate analysis | 20130096902 | 20130418 |
| Mechanisms are provided for predicting effects of soft errors on an integrated circuit device design. A data processing system is configured to implement a unified derating tool that includes a machine derating front-end engine used to generate machine derating information, and an application derating front-end engine used to generate application derating information, for the integrated circuit device design. The machine derating front-end engine executes a simulation of the integrated circuit device design to generate the machine derating information. The application derating front-end engine executes an application workload on existing hardware similar in architecture to the integrated circuit device design and injects a fault into the existing hardware during execution of the application workload to generate application derating information. The machine derating information is combined with the... |
| Optimal combined 2r/3r regenerators placement method for line network topologies in optical wdm networks | 20130089323 | 20130411 |
| A method for optimal combined 2R/3R regenerators placement for optical transmission includes determining an optimal placement of multiple 2R and 3R regenerators that minimizes bit error rate BER at a destination node, determining an optimal number of the 2R and 3R regenerators that minimizes a total cost while satisfying the BER at the destination node, and determining an optimal placement of the 2R and 3R regenerators along a route in the optical transmission.
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| Receiving apparatus and radio communication method | 20130090069 | 20130411 |
| A radio communication device capable of lightening the influence of a frequency selective fading in the wide-band transmission of a single carrier thereby to prevent deterioration of error rate characteristics. In this device, an FFT unit subjects a modulated signal inputted from a modulation unit to a Fourier transformation. A pilot insertion unit inserts a pilot symbol into a plurality of individual frequency components of the modulated signal. Weight multiplication units multiply the individual frequency components and the pilot symbols inserted into the individual frequency components, by weight coefficients set at a weight coefficient setting unit. IFFT units subject the frequency components to an inverse Fourier transformation, thereby to convert the frequency components into time domains.
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| Base station and method for channel coding and link adaptation | 20130077661 | 20130328 |
| A base station is arranged for performing channel coding and link adaptation. The base station comprises one or more processors and physical layer circuitry arranged to decode symbols received from a user station to determine an error rate, the symbols received through a plurality of antennas, receive signaling from the user station, the signaling including channel quality information for channel resources of an orthogonal frequency division multiplexed (OFDM) channel, select a modulation and coding rate for transmission of symbols to the user station based at least in part on the error rate, and transmit a transmit power control command to the user station, the transmit power control command based at least in part on a downlink path loss estimate. The base station may also transmit additional... |
| Automatic semantic evaluation of speech recognition results | 20130080150 | 20130328 |
| A semantic error rate calculation may be provided. After receiving a spoken query from a user, the spoken query may be converted to text according to a first speech recognition hypothesis. A plurality of results associated with the converted query may be received and compared to a second plurality of results associated with the converted query.
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| Apparatus and method for receiving a secure telegram | 20130080846 | 20130328 |
| An apparatus includes a communication device and an evaluation unit, wherein the communication device can be linked to a communication bus and can receive secure telegrams by way of the communication bus, and wherein a secure telegram includes user data and CRC data in each instance. In at least one embodiment, in order to improve the communication within the secure bus system, the evaluation unit can determine an error rate from received secure telegrams by way of a CRC check and if a threshold value of the error rate stored in the evaluation unit is exceeded, can effect a secure state of the apparatus.
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| System and method for correcting errors in data using a compound code | 20130080862 | 20130328 |
| Storage of digital data in non-volatile media such as NAND FLASH needs to take account of the errors in data retrieved from the memory. The error rate tends to increase with the number of write/erase cycles of a cell of memory and with the time that the data has been stored. To achieve a very low uncorrected bit error rate (UBER) a substantial amount of redundancy data needs to be stored for error correction purposes. A method and apparatus is disclosed where a first redundancy data is represented by a second redundancy data computed from the first redundancy data. The first redundancy data may not be stored and is reconstructed from the stored data using a same generation procedure as previously used. The reconstructed estimate of... |
| Information reproduction apparatus and information reproduction method | 20110013500 | 20110120 |
| A small size circuit reproducing data with low error rate even when a signal includes a non-linear distortion is desired. In such a circuit, the Viterbi method is performed. In the Viterbi method, branch metrics are calculated based on a difference of a sampled reproduction signal and a predetermined expectation values. Path metrics are calculated from the branch metrics. Paths among the plurality of paths having the calculated path metrics and merging at a same state are compared with one another. Based on the magnitude of the compared path metrics, survivor path is selected. In the circuit, for the path metrics of paths merging at a same state, offset corresponding to a determination result until a merging point is added to the paths for the comparison... |
| Forward error correction (fec) enabled photonic integrated circuit (pic) chips with multiple signal channels | 20110008039 | 20110113 |
| A forward error correction (FEC) communication device that includes a transmitter photonic integrated circuit (TxPIC) or a receiver photonic integrated circuit (RxPIC) and a FEC device for FEC coding at least one channel with a first error rate and at least one additional channel with a second error rate, wherein the first error rate is greater than the second error rate. The TxPIC chip is a monolithic multi-channel chip having an array of modulated sources integrated on the chip, each operating at a different wavelength, wherein at least one of the modulated sources is modulated with a respective FEC encoded signal. The TxPIC also includes an integrated wavelength selective combiner for combining the channels for transport over an optical link.
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| Optimal training sequence and channel estimation method and system for superimposed training based ofdm systems | 20110007829 | 20110113 |
| The present invention relates to a method for minimizing means square estimation error (MSEE) and bit error rate during channel estimation and equalization between a transmitter and a receiver of an orthogonal frequency division multiplexing (OFDM) systems. The method comprises transmitting from said transmitter to said receiver a training sequence for channel estimation being superimposed onto data at specific pilot to data power ratio (PDPR), receiving the OFDM signals along with the training sequence as an input, cross-correlating said received signal to a specific lag determined by the rms delay spread of the channel, with a specific known training sequence stored in a register, and which is also the sequence that is added to the data at the transmitter in the time domain having a prescribed... |
| Method and apparatus for optimizing target error rates for link adaptation in a communication system | 20110007790 | 20110113 |
| A method and apparatus for optimizing target error rates for link adaptation in a communication system. The method includes estimating a data rate associated with transmission of a data stream over a communication link. A required target error rate is then selected from a plurality of pre-defined target error rate values based on whether the estimated data rate is within a range of at least one of a plurality of pre-defined threshold values, where each of the pre-defined target error rate values maps to one of the plurality of pre-defined threshold values. A link adaptation parameter associated with the communication link is then selected or updated to maintain the required target error rate and the data stream is transmitted over the communication link using the selected/updated... |
| Method and apparatus for sorting particles | 20110005978 | 20110113 |
| A method and apparatus for sorting particles moving through a closed channel system of capillary size comprises a bubble valve for selectively generating a pressure pulse to separate a particle having a predetermined characteristic from a stream of particles. The particle sorting system may further include a buffer for absorbing the pressure pulse. The particle sorting system may include a plurality of closely coupled sorting modules which are combined to further increase the sorting rate. The particle sorting system may comprise a multi-stage sorting device for serially sorting streams of particles, in order to decrease the error rate.
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| Method and system for control of communication equipment based on a bit error rate derived from a frame alignment signal | 20110004802 | 20110106 |
| Consistent with the present disclosure, circuitry may be provided in an optical receiver that can determine a bit error rate (BER) associated with an incoming signal by dividing the number of errored bits in a frame alignment signals (FAS) by the number of bits in the FAS. Accordingly, although an optical signal may be severely degraded and forward error correction (FEC) cannot be performed, a BER may be obtained if the FAS can be identified. The BER can then be used in a feedback loop to control various optical or electrical components in the receiver to improve or reduce the BER to a level, for example, at which FEC can be performed.
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| Method for enhancing verification efficiency regarding an error handling mechanism of a controller of a flash memory, and associated memory device and controller thereof | 20110004795 | 20110106 |
| A method for enhancing verification efficiency regarding error handling mechanism of a controller of a Flash memory includes: providing an error generation module, for generating errors; and triggering the error generation module to actively generate errors of at least one specific type in order to increase an error rate corresponding to the specific type. An associated memory device and the controller thereof are provided, where the controller includes: a ROM arranged to store a program code; a microprocessor arranged to execute the program code to control access to the Flash memory and manage a plurality of blocks, and further enhance the verification efficiency regarding error handling mechanism of the controller; and an error generation module arranged to generate errors. The controller that executes the program code... |
| Bit error rate reduction in chaotic communications | 20110004792 | 20110106 |
| A system for chaotic sequence spread spectrum communications includes a transmitter (402) for transmitting information symbols using a chaotic sequence of chips generated at the transmitter, the information symbols having a duration of transmission based on a threshold symbol energy value and the chips. The system also includes a receiver (404) for extracting the information symbols from the transmitted signal using a chaotic sequence of chips generated at the receiver and the threshold symbol energy value. In the system, the chips generated at the transmitter and the receiver are identical and synchronized in time, where the duration of transmission of the information symbols in the carrier is a total duration of a selected number of the chips used for transmitting, and where the number of the... |
| Sampling point detection circuit, transmission system, pre-emphasis intensity adjustment method, logic analyzer, and evaluation method for evaluating transmission path | 20110002370 | 20110106 |
| A sampling point detection circuit 1 comprises: means 11 for setting amplitude division lines along a time axis and time division lines along an amplitude axis of an eye diagram; means 12 for calculating a virtual circle that is inscribed in a divided region having the smallest area among divided regions obtained when a region that is defined by segments each connecting intersections of a bit error rate contour line of the eye diagram and the amplitude division line and intersections of the bit error rate contour line and the time division line and that contains an intersection of the amplitude division line and the time division line is divided by the amplitude division line and time division line; and means 13 for determining, as a... |
| Variable interleave data transmission | 20100332941 | 20101230 |
| In cable modem termination systems (CMTS) and other information transmission systems, a method for changing the interleave depth associated with each data stream is provided. This may be done dynamically, and for any subset of downstream devices such as modems. The interleave depth may be set on an individual device level. Embodiments may decrease data receiving latency on devices that do not suffer from error rates, such as caused by burst noise, while maintaining throughput on devices with high error rates.
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| Method for speeding up serial data tolerance testing | 20100332931 | 20101230 |
| A receive test accelerator retrieves an adjusted jitter amount and an adjusted test time in which to test a device. The adjusted jitter amount and the adjusted test time correspond to an adjusted bit error rate that is extrapolated from a baseline bit error rate, which corresponds to a baseline jitter amount. In turn, the receive test accelerator tests the device, at the adjusted test time, using a data stream that is modulated by the adjusted jitter amount.
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| Quality management in a data-processing environment | 20100332899 | 20101230 |
| A method, system and computer program for quality management of a plurality of documents associated with a data-processing operation of an organization is provided. The documents include several fields, the organization has employees, and the method comprises determination of error rates. Errors are reduced in the plurality of documents by focusing on critical fields. The occurrence of errors is predicted by determining a correlation between the errors and a set of attributes, which is updated. Reducing and predicting errors control the error rate. A method for measuring the quality of a plurality of documents is also provided. The measurement is based on the relative operational impact of the errors and the frequency of errors associated with each field.
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| Phonetic distance measurement system and related methods | 20100332230 | 20101230 |
| Phonetic distances are empirically measured as a function of speech recognition engine recognition error rates. The error rates are determined by comparing a recognized speech file with a reference file. The phonetic distances can be normalized to earlier measurements. The phonetic distances/error rates can also be used to improve speech recognition engine grammar selection, as an aid in language training and evaluation, and in other applications.
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| Method and system for optical performance monitoring in ethernet passive optical networks | 20100329668 | 20101230 |
| One embodiment provides a system that tests optical performance in an Ethernet passive optical network (EPON), which includes an optical line terminal (OLT) and at least one optical network unit (ONU). The system configures an ONU with a circular queue that contains test frames for testing optical performance. The OLT then notifies the ONU to transmit test frames at a specified data rate for a specified duration. After receiving test frames at the OLT, the system measures frame loss and/or bit error rate based on the received test frames.
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| Polling method and vehicle search method in digital radio communication system | 20100329233 | 20101230 |
| The present invention provides a polling method in a radio digital communication system making it possible to shorten time required for polling without causing increase in an error rate and to efficiently manage and administrate communications. In a digital radio communication system for collecting information from a plurality of terminal stations by polling, a polling response signal to be transmitted from each terminal station to a base station has a frame format constructed of a one-frame in which a cyclic bit pattern is placed at a leading end of the frame format.
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| Information recording apparatus and information recording method | 20100329094 | 20101230 |
| According to one embodiment, an information recording apparatus for recording, in a free area, first low-quality recorded data having an error rate not less than a first error rate upon finalization of a recording medium, the information recording apparatus includes a reader, a measurement module, a detector, and a recorder. The reader is configured to read recorded data from a recording area of the recording medium. The measurement module is configured to measure an error rate of the recorded data of each predetermined data block. The detector configured to detect the first low-quality recorded data based on an error rate measurement result of the measurement module. The recorder is configured to correct an error in the first low-quality recorded data, and record error-corrected recorded data corresponding... |
| Transmission capacity probing using adaptive redundancy adjustment | 20100328528 | 20101230 |
| In accordance with an example embodiment of the present invention, there is provided an apparatus configured to instruct a redundancy encoder to increase a level of redundancy of a media stream, an error rate determination to determine an error rate of a communication path conveying the media stream with increased redundancy, a comparator configured to compare a bandwidth used to convey the encoded media stream at the increased redundancy level with a bandwidth for conveying the encoded media stream at a second quality level greater than the first quality level, the apparatus being further configured to provide a switching signal to a media encoder to start encoding the media stream at the second quality level responsive to the used bandwidth being sufficient for conveying the media... |
| Radio communication device and repetition method | 20100325520 | 20101223 |
| Provided is a radio communication device which can obtain the maximum improvement effect of the error rate characteristic by repletion when an LDPC code is used as an error correction code. In this device, an LDPC encoding unit (101) performs LDPC encoding on a transmission bit string by using an inspection matrix so as to obtain an LDPC code word formed by a systematic bit and a parity bit and output it to a repletion unit (102) and output the inspection matrix to the repetition unit (102). The repetition unit (102) performs repetition in the ascending order of the column weight of the inspection matrix in the LDPC code word and if a plurality of bits have the same column weight, in the ascending order of... |
| Accuracy measurement of database search algorithms | 20100325134 | 20101223 |
| A system, method and program product for evaluating search algorithms. A method is provided that includes: defining a population of searches and database records from a search history database; applying a sampling method and direct sampling rates to each search/record pair in the population using a computing system, wherein search/record pairs having a higher variability relative to the population are assigned a relatively higher probability; randomly sampling a direct sample of search/record pairs with the computing system using the direct sampling rates to increase a likelihood of obtaining search/record pairs having the higher variability; running a search algorithm and measuring errors for the direct sample and/or for an associated indirect sample; and calculating an estimated error rate for the search algorithm using inverse probability weighting.
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| Method for enhancing reliability of information transmission | 20100318883 | 20101216 |
| The present invention provides a method for enhancing reliability of information transmission, comprising the steps of: (a) establishing a matrix based on the length of bits of valid information in frame time slots; and creating a new matrix by presetting Error Correction Coding (ECC) for rows and columns of said matrix; (b) adopting the 1st Interleaving method to re-allocate bits which have been processed twice by using said ECC in said new matrix, to both ends of said frame time slots; and (c) adopting the 2nd Interleaving method to re-allocate the remaining bits in said new matrix to the middle of said frame time slots. After processed like this, the anti-interfering ability of the bits at both ends of TDMA frame time slot can be significantly... |
| Mode selection for data transmission in wireless communication channels based on statistical parameters | 20100318861 | 20101216 |
| A method and communication system for selecting a mode for encoding data for transmission in a wireless communication channel between a transmit unit and a receive unit. The data is initially transmitted in an initial mode and the selection of the subsequent mode is based on a selection of first-order and second-order statistical parameters of short-term and long-term quality parameters. Suitable short-term quality parameters include signal-to-interference and noise ratio (SINR), signal-to-noise ratio (SNR), power level and suitable long-term quality parameters include error rates such as bit error rate (BER) and packet error rate (PER). The method of the invention can be employed in Multiple Input Multiple Output (MIMO), Multiple Input Single Output (MISO), Single Input Single Output (SISO) and Single Input Multiple Output (SIMO) communication systems... |
| Recognizer weight learning device, speech recognizing device, and system | 20100318358 | 20101216 |
| A speech recognition apparatus (110) selects an optimum recognition result from recognition results output from a set of speech recognizers (s1-sM) based on a majority decision. This decision is implemented with taking into account weight values, as to the set of the speech recognizers, learned by a learning apparatus (100). The learning apparatus includes a unit (103) selecting speech recognizers corresponding to characteristics of speech for learning (101), a unit (104) finding recognition results of the speech for learning by using the selected speech recognizers, a unit (105) unifying the recognition results and generating a word string network, and a unit (106) finding weight values concerning a set of the speech recognizers by implementing learning processing. When finding weight values, the learning apparatus selects a word... |
| Optical receiver and jitter tolerance control method | 20100316394 | 20101216 |
| An optical receiver includes an optical device that receives input light and converts the input light to an electric signal; an equivalent part that carries out waveform shaping on the electric signal; an amplifier that amplifies the electric signal; a discrimination part that discriminates data of the electric signal; an input optical power detecting part that detects input optical power of the input light; and a control part that makes an error rate in the electric signal with respect to the input optical power worse when the input optical power detected by the input optical power detecting part is equal to or less than a value corresponding to minimum receiver sensitivity.
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| System and method for channel-adaptive error-resilient burst mode transmission | 20100316381 | 20101216 |
| In a passive optical network, an upstream transmission rate from an ONT to an OLT can be optimized by matching a transmission scheme for a channel to the upstream transmission characteristics of the channel. An FEC coding can be made channel dependent so that channels with low error rates can use minimal protection, and therefore minimal overhead, while channels with high input bit error rates can use the level of FEC coding required to produce a desired output bit error rate.
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| System and method for channel-adaptive error-resilient transmission to multiple transceivers | 20100316380 | 20101216 |
| In a passive optical network, a downstream transmission rate from an OLT to multiple ONTs can be optimized by matching a transmission scheme for frames addressed to a channel to the downstream transmission characteristics of the channel. An FEC coding can be made channel dependent so that channels with low error rates can use minimal protection, and therefore minimal overhead, while channels with high input bit error rates can use the level of FEC coding required to produce a desired output bit error rate.
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| Apparatus and method of transmitting and receiving reception acknowledgment signal in mobile communication system | 20100315961 | 20101216 |
| Provided are apparatus and method of transmitting and receiving a reception acknowledgment signal in a mobile communication system. The apparatus and method of receiving the reception acknowledgment signal includes respectively calculating a probability that the received reception acknowledgment signal is a reception success signal and a probability that the reception acknowledgment signal is a reception failure signal, by using an estimated packet error rate predicted based on a pre-set required packet error rate and determining whether the reception acknowledgment signal is the reception success signal or the reception failure signal. The apparatus and method of transmitting a reception acknowledgment signal includes determining transmission powers of a reception success signal and a reception failure signal in order to maximize a difference between a first complex signal and... |
| Method and metric for selecting and designing multimode fiber for improved performance | 20100315620 | 20101216 |
| A new metric applicable to the characterization and design of multimode fiber (MMF) is described. The metric is derived from a Differential Mode Delay (DMD) measurement and when used in combination with industry-standard metrics such as Effective Modal Bandwidth (EMB) and DMD, yields a more accurate prediction of MMF channel link performance as measured by Bit Error Rate (BER) testing. The metric can also be used in the design of MMF for improved bandwidth performance. When implemented as a test algorithm in production, it can be used to select, sort, or verify fiber performance. This process can yield a multimode fiber design with a greater performance margin for a given length, and/or a greater length for a given performance margin.
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| Array substrate for ips-mode lcd device and method of fabricating the same | 20100315584 | 20101216 |
| Provided is an array substrate for an IPS-mode LCD device and method of fabricating the same that prevents a problem referred to as wavy noise. The IPS-mode LCD device and method have a shorter processing time and low error rate without an increase in fabrication and production costs.
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| Uplink transmit power control method, communication terminal unit, base station unit, and mobile communication system | 20100304753 | 20101202 |
| In a mobile communication system in which a modulation and coding scheme is selected in accordance with reception quality information in which a terminal periodically reports to a base station, a method for causing a terminal located near the boundary of a cell to reduce its uplink transmit power by considering intercell interference and without incurring an increase in error rate. The method includes the steps of: a first base station detecting an interference level and terminal identification information identifying an interfering terminal, and transmitting interference information to all neighboring base stations; a second base station unit, as the serving base station of the terminal, receiving the interference information and transmitting control information to the terminal; and the terminal receiving the control information, reducing transmit power... |
| Paired-end reads in sequencing by synthesis | 20100304447 | 20101202 |
| The disclosure provides methods of generating paired reads in sequencing-by-synthesis process, particularly, in systems with relatively short read lengths (e.g., 15-35 bases), such as for example, in single molecule sequencing by synthesis. Several implementations of the methods are provided. Of particular advantage are the methods that permit re-sequencing of the template, which yields lower error rates. The invention further provides methods of using paired reads, for example, for positioning them over repeats or for assembly into large sequences, including whole genome assembly.
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| Determining contribution of burst noise to data errors | 20090319838 | 20091224 |
| A method for determining a contribution of burst noise to a bit error rate in a digital system for reception of an interleaved forward error correction-enabled digital symbol stream is described. The method is based on identifying errored symbols at a decoding stage, determining their positions in the interleaved stream, and performing a windowing operation such that the errored symbols located within the window in the interleaved stream are designated as burst errored symbols. A corresponding digital receiver and a digital transmission system are also disclosed.
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| Apparatus and method to minimize performance degradation during communication path failure in a data processing system | 20090319822 | 20091224 |
| A method to minimize performance degradation during communication path failure in a data processing system, comprising a host computer, a storage controller, and a plurality of physical communication paths in communication with the host computer and the storage controller, where the method establishes a. threshold communication path error rate, and determines an (i)th actual communication path error rate for an (i)th physical communication path, wherein that (i)th communication path is one of the plurality of physical communication paths. If the (i)th actual communication path error rate is greater than the threshold communication path error rate, the method discontinues use of the (i)th physical communication path.
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| Methods and systems for stc signal decoding using mimo decoder | 20090316840 | 20091224 |
| Space time coding (STC) may be applied at the transmitter adding redundant information in both space and time dimensions. At the receiver, the received STC signal may be decoded using a spatial multiplexing MIMO decoding, for example, based on either Minimum Mean Square Error (MMSE) or maximum-likelihood (ML) algorithms. A selective STC decoder may incorporate both the conventional maximum ratio combining (MRC) decoding scheme and a MIMO decoding scheme. One of the STC decoding schemes may be selected, for example, based on estimated channel conditions in order to achieve a trade-off between error rate performance and computational complexity. Components used for a non-selected scheme may be powered down.
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| Mimo receiver | 20090316803 | 20091224 |
| In a MIMO receiver, initial solutions using sub-optional decoding algorithm are determined for the symbols transmitted from each of a number of transmit antennas at a given time (100). The initial solutions (Sinit1, . . . , SinitNt) are hard-mapped to the nearest possible symbols of transmission (Sest1, . . . , SestNt). For each of the nearest possible symbols limited areas around them in the constellation plane are defined. A list of candidate symbol vectors (list) is then determined, including only symbols lying within the limited areas of the constellation plane. Finally, a joint decoding technique such as ML-technique is implemented to determine the best of the candidate symbol vectors. The number of the calculations can thus be significantly reduced, without having excessively damaging effects... |
| M+l bit read column architecture for m bit memory cells | 20090310406 | 20091217 |
| A memory device and programming and/or reading process is described that programs a row of non-volatile multi-level memory cells (MLC) in a single program operation to minimize disturb within the pages of the row, while verifying each memory cell page of the row separately. In one embodiment of the present invention, the memory device utilizes data latches to program M-bits of data into each cell of the row and then repurposes the data latches during the subsequent page verify operations to read M+L bits from each cell of the selected page at a higher threshold voltage resolution than required. In sensing, the increased threshold voltage resolution/granularity allows interpretations of the actual programmed state of the memory cell and enables more effective use of data encoding and... |
| Hollow fiber membrane module and method for making thereof | 20090308797 | 20091217 |
| The present invention purposes to provide a hollow fiber membrane module that minimizes the error rate in a manufacturing process thereof, disperses weight by separating an enlarged hollow fiber membrane module into a plurality of small modules, and provides a manufacturing method thereof. The present invention includes a central water tube having a plurality of inlets formed in the circumferential direction thereof, a central air tube provided in the central water tube, a plurality of housings longitudinally provided in the circumferential direction of the central water tube, a hollow fiber membrane provided in the respective housing and in which water is treated by difference of pressure, a fixing part fixing the lower part of the hollow fiber membrane to the housing, and a collector provided in... |
| Quality of service in an optical network | 20090304380 | 20091210 |
| A method and apparatus for implementing optical network quality using bit error rate and chromatic dispersion. According to one embodiment of the invention, a method includes the provision of quality of service in a wavelength division multiplexing optical network that supports a plurality of bit rates. As part of this method, the cumulative noise and cumulative chromatic dispersion for each available path as a whole is determined, where an available path is a series of two or more nodes each connected by an optical link on which a set of wavelengths is available for establishing a lightpath. In addition, different grades of path quality are distinguished based on bit error rate (BER), where BER is based on cumulative noise and bit rate. Furthermore, a minimum path... |
| Method for decoding digital information encoded with a channel code | 20090304114 | 20091210 |
| The performance of multiple-input multiple-output (MIMO) systems, employing coding with multiple antennas depends heavily on the demapper algorithm which is used for MIMO detection. Soft-output demappers lead to better bit error rate (BER) performance compared to hard-decision demappers, but have a higher implementation complexity. The algorithm, proposed in this paper, relies on low-complexity harddecision MIMO detection. The reliability information for the received bits used to compute log-likelihood ratios is based on an estimate of the average bit error rate which is for example derived from the corresponding channel state information only. The algorithm is applicable to any hard-decision MIMO detector. As an example, we describe the application of the scheme to a linear MMSE detector and to sphere decoding with early termination.
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| Serdes with jitter-based built-in self test (bist) for adapting fir filter coefficients | 20090304054 | 20091210 |
| A first device transmits data over a first branch of a communications link toward a second device. That second device loops the received data pattern back over a second branch of the communications link. A bit error rate of the looped back data pattern is determined and a pre-emphasis applied to the transmitted data pattern is adjusted in response thereto. The first device further perturbs the data pattern communications signal so as to increase the bit error rate. The pre-emphasis is adjusted so as to reduce the determined bit error rate in the looped back data pattern in the presence of the perturbation. The steps for perturbing the signal and adjusting the pre-emphasis are iteratively performed, with the perturbation of the signal increasing with each iteration... |
| Thermal flyheight control heater preconditioning | 20090296270 | 20091203 |
| Systems and methods for magnetic head preconditioning using a thermal flyheight control heater are discussed. The method of manufacturing the magnetic head comprises measuring a bit error performance of the magnetic head, heating the magnetic head with the thermal flyheight control heater, measuring another bit error rate performance, and determining a performance increase based on comparing the bit error rate performances. The heating of the magnetic head is performed while the magnetic head is unloaded from a disk. An element within the magnetic head is deformed plastically.
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| Magnetic recording medium evaluation apparatus and evaluation method | 20090296254 | 20091203 |
| This invention provides a magnetic recording medium evaluation apparatus and evaluation method which yield results having good correlation with error rate measurements even when comparing media with different structures. Signals from a function generator are recorded in a magnetic recording medium. The recording signals are also passed through a first digital filter to obtain ideal restored signals. Reproduced signals from the magnetic recording medium are sampled in synchronization with the output from the function generator, and the discrete signals are passed through a second digital filter to obtain restored signals. The outputs from the first and second digital filters are input to an operational amplifier, and the difference between the restored signals and the ideal restored signals is taken for each sampling of the recording signals.... |
| Finding a variable length code with optimal error recovery | 20090295607 | 20091203 |
| Systems and methodologies for analyzing error recovery performance of variable length codes utilized for encoding and decoding data are provided herein. Synchronization recovery of a set of variable length codes can be evaluated assuming that an encoded bit stream is transmitted over a binary symmetric channel. Further, mean symbol error rates corresponding to each of the variable length codes in the set can be determined based upon the evaluation of the synchronization recovery. Moreover, a subset of the variable length codes with optimal error recovery can be selected as a function of the mean symbol error rates.
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| Isolation trench intersection structure with reduced gap width | 20090294893 | 20091203 |
| The invention relates to isolation trenches having a high aspect ratio for trench-insulated smart power technologies in Silicon On Insulator (SOI) silicon wafers. The specific geometric layout of the intersections and junctions of the isolation trenches allows error rate reduction and simplification of manufacture.
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| Access point multi-level transmission power and protocol control based on the exchange of characteristics | 20090291705 | 20091126 |
| A wireless access point and multiple wireless terminals exchange utilization, status, mobility and reception characteristics. Each wireless terminal generates reception characteristics based on transmissions received from the wireless access point and from other devices in the network. In one operating mode, the characteristics gathered by the wireless devices are forwarded to the wireless access point, and, based on all received characteristics, the wireless access point selects its own transmission power for different types of the transmission. In another mode, all characteristics are exchanged between every wireless terminal and the access point so that each can independently or cooperatively make transmission power control decisions. In a further mode, the wireless access point adjusts protocol parameters based on an assessment of the characteristics received from the client devices.... |
| Operating parameter control for integrated circuit signal paths | 20090287978 | 20091119 |
| An integrated circuit (2) includes a signal source (4, 6) and a signal destination (10, 12) linked by a signal path (8). Error correction codes (e.g. Hamming codes) are applied to the signals to be transmitted. Errors detected in the signal transmission are used to control an operating parameter of the signal path, such as signal voltage level, body bias voltage, clock frequency and/or temperature. The control applied is closed-loop feedback control seeking to maintain a finite non-zero predetermined error rate. The technique can also be used between a memory accessing integrated circuit (54) and a separate memory integrated circuit (56). Furthermore, the technique can be used to provide fixed, but differing operating parameters for signal lines within a signal path. Control signals which may be... |
| Communication terminal device and reception environment reporting method | 20090287970 | 20091119 |
| A communication terminal device and a reception environment reporting method produce a more excellent throughput, by making a report of a reception environment with higher accuracy. An SIR measuring section measures an SIR from a reception signal that has been received from a base transceiver station. A CQI converter converts the SIR that has been measured by the SIR measuring section into a CQI value. A BLER calculating section calculates a block error rate of the reception signal. A CQI correcting section corrects the CQI value that has been calculated by the CQI converter, in accordance with the block error rate. A CQI transmitter transmits the CQI value that has been corrected by the CQI correcting section, to the base transceiver station.
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| Electronic apparatus and bit error rate tolerance method for programming non-volatile memory devices | 20090287969 | 20091119 |
| The present invention provides an apparatus and method for using a bit error rate tolerance (BERT) technique for high-speed programming of non-volatile electronic memory devices. The device programmer is comprised of an embedded computer system and specialized electronic circuitry to interface to the device to be programmed. According to one aspect of the invention, the device programmer contains digital registers to accumulate the number of incorrect data bits encountered during the verification of the device programming operation. A field-programmable input to the device programmer specifies the BERT to be allowed at precise intervals within the device. Devices that are found to exceed the specified BERT shall be rejected.
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| Method and apparatus for polarization stabilization in optical receivers with complex modulation formats | 20090285585 | 20091119 |
| High optical communication rates are making their way into networks initially designed for 10 Gigabits per seconds (Gbps). These higher rates of 40 Gbps and higher have shorter signaling periods and are more susceptible to differential group delay (DGD). A method and corresponding apparatus in an example embodiment of the present invention compensates for polarization state sensitivity of a receiver by determining a performance metric relating to an error rate due to transmission and reception of a modulated optical signal in a medium introducing DGD. Based on the performance metric, a control vector is determined to control a polarization state of the modulated optical signal. The control vector is applied to a polarization effecting device to compensate for the DGD and the polarization state sensitivity of... |
| Methods and systems of improved success rate for decoding downlink map and uplink map ies in mobile wimax mobile | 20090285164 | 20091119 |
| Methods and apparatus for decoding MAP information elements (MAP IEs) in an orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) frame, even when the received downlink (DL) or uplink (UL) MAP message cyclic redundancy check (CRC) fails, may be provided. By continuing to parse the MAP IEs in the MAP message despite a CRC failure in the MAP message or a data burst, the packet error rate may be reduced, and the wireless system throughput may be increased.
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| Methods and systems for adaptive effective cinr reporting in a wireless communication system | 20090285109 | 20091119 |
| Embodiments of the present disclosure allow a MS to dynamically adjust the mapping of a physical CINR measurement to an effective CINR. For some embodiments, an effective CINR value may be generated based on a physical CINR value and a measured packet error rate (PER) over one or more time periods. By dynamically adjusting the effective CINR reported back to a BS, the MS may allow the BS to select a coding scheme that effectively compensates for changes in channel conditions, which may improve system performance.
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| Evaluation method of random error distribution and evaluation apparatus thereof | 20090282299 | 20091112 |
| A degree of conformity of error distribution of a digital signal to the Poisson distribution is quantitatively determined. The digital signal including error data, which is randomly generated at a predetermined error rate, is divided into data number of measurement units, wherein the data number is determined on the basis of the error rate. A sample number of the measurement units are acquired from the measurement units, and the number of errors contained in each measurement unit is measured as a measurement value. Further, the number of times of occurrence of each measurement value is calculated, a Poisson distribution function is calculated, and a degree of a bond between the Poisson distribution and the distribution of the number of times of occurrence is determined by using... |
| Bit-error rate in fixed line-rate systems | 20090279637 | 20091112 |
| A method of reducing bit-error rate is described. The method includes transmitting a data stream of data words at a line rate that is adjustable and equal to a positive delta value added to an established data rate. The method includes accumulating available time slots in the transmitted data stream, and selectively retransmitting a subset of the data words such that the retransmitted data words occupy no more than the accumulated available time slots.
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| Ofdm communication apparatus | 20090279627 | 20091112 |
| An OFDM communication apparatus includes a determining section determine a number of known signals for transmission path estimation to be inserted in a transmit signal based on channel quality with respect to a communicating party, and a generating section performs inverse Fourier transform processing on an information signal and the number of known signals for transmission path estimation determined by the determining section and generates a transmit signal for the communicating party. The apparatus achieves both an improvement in demodulated signal error rate characteristics and an improvement in information signal transmission efficiency.
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| Evaluation method of random error distribution and evaluation apparatus thereof | 20090282299 | 20091112 |
| A degree of conformity of error distribution of a digital signal to the Poisson distribution is quantitatively determined. The digital signal including error data, which is randomly generated at a predetermined error rate, is divided into data number of measurement units, wherein the data number is determined on the basis of the error rate. A sample number of the measurement units are acquired from the measurement units, and the number of errors contained in each measurement unit is measured as a measurement value. Further, the number of times of occurrence of each measurement value is calculated, a Poisson distribution function is calculated, and a degree of a bond between the Poisson distribution and the distribution of the number of times of occurrence is determined by using... |
| Bit-error rate in fixed line-rate systems | 20090279637 | 20091112 |
| A method of reducing bit-error rate is described. The method includes transmitting a data stream of data words at a line rate that is adjustable and equal to a positive delta value added to an established data rate. The method includes accumulating available time slots in the transmitted data stream, and selectively retransmitting a subset of the data words such that the retransmitted data words occupy no more than the accumulated available time slots.
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| Ofdm communication apparatus | 20090279627 | 20091112 |
| An OFDM communication apparatus includes a determining section determine a number of known signals for transmission path estimation to be inserted in a transmit signal based on channel quality with respect to a communicating party, and a generating section performs inverse Fourier transform processing on an information signal and the number of known signals for transmission path estimation determined by the determining section and generates a transmit signal for the communicating party. The apparatus achieves both an improvement in demodulated signal error rate characteristics and an improvement in information signal transmission efficiency.
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| Method and apparatus for monitoring bit-error rate | 20090276664 | 20091105 |
| A test set for evaluating network performance is described, and which may include an output device, a processor, a power supply, a memory unit, and a control terminal. The test set may be configured to receive a user-entered selection of one of a plurality of different bit-error rate profiles and generate a test signal exhibiting the selected bit-error rate profile. The test set may also supply the test signal exhibiting the selected bit-error rate profile to a network under test. In addition, the test set may receive as an input, an output from the network under test. The output may include the test signal exhibiting the selected bit-error rate. The test set may evaluate the received test signal and determine the performance of the network in... |
| Method and system for processing channel b data for amr and/or wamr | 20090276221 | 20091105 |
| A method and system for processing channel B data for AMR and/or WAMR may include generating one or more channel B data hypotheses for a present speech frame, if channel A data has a valid CRC and channel B data is unacceptable. Channel B data may be unacceptable, for example, due to high residual bit error rate and/or low Viterbi metric. Speech hypotheses may also be generated for the present speech frame, where each speech hypothesis may be based on a corresponding channel B data hypothesis and channel A data. A speech constraint metric may be assigned to each speech hypothesis that is compared to a previous frame speech data. The speech hypothesis that is closest to the previous frame speech data may be selected as... |
| Adaptive data recovery system with input signal equalization | 20090274206 | 20091105 |
| Data receivers often include equalizers for operating on received signals. The equalizers often have a plurality of taps, with signals from each tap weighted based on tap settings or values. The tap settings may be set based on bit error rates of data output from the equalizer. In some embodiments data output from the equalizer is split into two signals, and the two signals are processed to indicate a data eye of the data output from the equalizer. Preferred tap settings may be determined by setting tap settings to different values and using tap settings expected to maximize the data eye. This may be performed separately for different bit settings in an attempt to reduce effects of inter-signal interference.
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| Radio communication device and semiconductor integrated circuit device used for the same | 20090274193 | 20091105 |
| A semiconductor integrated circuit for a radio communication terminal sequentially uses a plurality of frequency channels by instructions from a hopping frequency decision unit to receive packet data by a reception unit. When the integrated circuit cannot detect the head of the packet data in reception operations, the integrated circuit cannot receive packet data should be received originally then assumes that the received packet data is a packet error. And the integrated circuit calculates packet error rates for each frequency channel on the basis of the number of times of reception operations performed for each frequency channel and of the number of times of packet errors to estimate channel qualities by using the packet error rates.
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| Reception of wideband signals with high temperature superconducting components to reduce co-site interference | 20080310480 | 20081218 |
| A comb limiter combiner for front end filtering reduces bit error rates with an increased reception range. Notch filters are tuned to suppress interfering frequency-hopped signals. An output comb filter suppresses out-of-band intermodulation products generated by any non-linear devices (such as limiters and the notch filters) in each of the comb limiter combiner sub-bands. Sensitivity is further increased by the use of cryogenically cooled high temperature superconductor components for the filters, amplifiers, and limiters used in each sub-band.
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| Method for adapting digital data transmission parameters to measured repetitive noise | 20080310546 | 20081218 |
| Following a transmission comprising a plurality of symbols, an error measurement is generated for each symbol, so that one may distinguish between symbols having a relatively low error and symbols having a relatively high error. A bit rate to be used for subsequent transmission is determined as a function of error measurements of those symbols that have relatively low error and as a function also of the proportion of symbols having a relatively high error, such that the bit rate reduces as the proportion increases. Measurement of the error rate and/or the durations of high and low error conditions may also be used to set other transmission parameters such as error-correcting code and interleaver settings.
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| Transmission controlling method in wireless communications system and receiver for use in the same system | 20080310549 | 20081218 |
| The present invention relates to a transmission controlling method in a wireless communications system and a receiver for use in the same system. The invention aims at realizing power control (or transmit rate control) more effective than previous techniques by means of utilizing a certain relationship between an error rate and an evaluation amount relating to the estimation amount. Thus, a certain relationship is defined between the evaluation amount relating to a reception condition and an error rate on the receiver, and on the basis of this certain relationship, transmit power of the transmitter is controlled.
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| Method and apparatus for power control of an air interface transmission | 20080311856 | 20081218 |
| An apparatus (101) performs power control for an air interface transmission between a receiver (105) and a transmitter (103). The apparatus (101) comprises a power control processor (113) which operates a power control loop for the air interface transmission in response to an error parameter. A discarded data processor (117) determines a discarded data measure indicating an amount of data actively discarded for the air interface transmission; and an error parameter processor (115) determines the error parameter in response to the discarded data measure. The data may be discarded in response to an evaluation of a delay criterion. The invention may allow power control to dynamically adjust both error rate and delay characteristics for the transmission.
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| Radio communication device and radio communication method | 20080311863 | 20081218 |
| A radio communication device capable of lightening the influence of a frequency selective fading in the wide-band transmission of a single carrier thereby to prevent deterioration of error rate characteristics. In this device, an FFT unit (13) subjects a modulated signal inputted from a modulation unit (12) to a Fourier transformation. A pilot insertion unit (14) inserts a pilot symbol into a plurality of individual frequency components (1-N) of the modulated signal. Weight multiplication units (15-1, 15-2) multiply the individual frequency components (1-N) and the pilot symbols inserted into the individual frequency components (1-N), by weight coefficients (W11-W1N, W21-W2N) set at a weight coefficient setting unit (54). IFFT units (16-1, 16-2) subject the frequency components (1-N) to an inverse Fourier transformation, thereby to convert the frequency... |
| Programming error correction code into a solid state memory device with varying bits per cell | 20080313493 | 20081218 |
| Memory devices that, in a particular embodiment, receive and transmit analog data signals representative of bit patterns of two or more bits such as to facilitate increases in data transfer rates relative to devices communicating data signals indicative of individual bits. Programming error correction code (ECC) and metadata into such memory devices includes storing the ECC and metadata at different bit levels per cell based on an actual error rate of the cells. The ECC and metadata can be stored with the data block at a different bit level than the data block. If the area of memory in which the block of data is stored does not support the desired reliability for the ECC and metadata at a particular bit level, the ECC and metadata... |
| System and method for predictive failure detection | 20080307273 | 20081211 |
| A method of predicting failure of an information handling device, such as a server, by monitoring an error rate, i.e., n errors per error period. Errors are reported only if the error rate is exceeded. An error count is kept, and errors are leaked from the count if the time difference between errors is more than the error period.
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| Method and system for implementing transmitting diversity and receiving diversity | 20080292011 | 20081127 |
| The method for implementing transmitting diversity includes receiving a symbol from a destination mobile terminal, by a mobile terminal which is in the same mobile terminal group with the destination mobile terminal, wherein the symbol is also sent from the destination mobile terminal to a base station; and processing, by the mobile terminal, the symbol and transmitting the symbol processed to the base station. The method for implementing receiving diversity includes receiving, by a mobile terminal, a symbol from a base station; finding a destination mobile terminal which is in the same mobile terminal group with the mobile terminal if the mobile terminal is not the destination of the symbol; and forwarding the symbol to the destination mobile terminal. Embodiments of the present invention solve the... |
| Quantum key distribution system and method | 20080292102 | 20081127 |
| A method and system for transmitting optical clock signals and quantum key signals on a single optical channel, and for reducing quantum bit error rate in a quantum key distribution system. The method includes receiving a multi-photon optical clock signal at an electro-optic switch at a first clock rate. The electro-optic switch may be configured for an interval defined by a second clock rate for generating a single photon quantum key signal. The multi-photon optical clock signal and the single photon quantum key signal may be combined such that the single optical channel transmits the single photon quantum key signal at a first interval and the multi-photon optical clock signal at a second interval. The quantum key signal may be transmitted from a transmitter at a... |
| Protocol tester and method for performing a protocol test | 20080294948 | 20081127 |
| Embodiments of the present invention provide a protocol tester for performing a protocol test, said protocol tester exhibiting an input for the feeding in of data, a protocol decoding device for the decoding of data, and an output for providing the decoded data, the protocol tester also comprising a device for measuring the bit error rate. A corresponding method for performing a protocol test is also provided.
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| Incremental redundancy coding system | 20080294967 | 20081127 |
| In packet digital communications using a two way communications medium such as wireless each received packet is subject to noise and/or interference which causes errors in some of the received symbols. A common method known as Incremental Redundancy (IR), Hybrid Automatic Repeat Request (HARQ) for corrects these transmission errors by using error detection in conjunction with transmission of additional redundant symbols forming a sequence of forward error correcting codes. Any residual errors are detected by means of a Cyclic Redundancy Check (CRC). The CRC symbols represent transmission overhead and degrade the throughput regardless of the quality of the transmission channel. This invention is concerned with providing error detection without the need for a CRC thereby improving the throughput. In a further embodiment of the invention for... |
| Optical information recording medium and method for manufacturing the same | 20080285415 | 20081120 |
| A transparent protective layer (106) having a thickness of 100 μm is formed of a resin film (100), a boundary layer (104) and an adhesive layer (103) on a signal recording layer (102). When nf, ni and na are the indices of refraction of the resin film (100), the boundary layer (104) and the adhesive layer (103), respectively, the relationship among nf, ni, and na satisfies any one of the following equation: na<ni≦nf; na>ni≧nf; na<nf≦ni; or na>nf≧ni, and the relationship among nf, ni, and na satisfies the following equation ... |
| Intelligent load balancing and failover of network traffic | 20080285441 | 20081120 |
| A hash engine in a network device driver maintains data on the utilization and error rate for each network interface card (“NIC”) within a local computing device. From this data, the hash engine intelligently selects transmit NICs and receive NICs based on various networking parameters provided from a software driver program. Transmit packets sent from the operating system in a local computing device to a remote computing device are intercepted, modified and redirected to transmit NICs selected by the hash engine for transmission to remote computing devices. Similarly, address resolution protocol (“ARP”) response packets sent by the operating system in response to ARP request packets are intercepted, modified and redirected to receive NICs selected by the hash engine for transmission. By selecting receive NICs and transmit... |
| Intelligent load balancing and failover of network traffic | 20080285448 | 20081120 |
| A hash engine in a network device driver maintains data on the utilization and error rate for each network interface card (“NIC”) within a local computing device. From this data, the hash engine intelligently selects transmit NICs and receive NICs based on various networking parameters provided from a software driver program. Transmit packets sent from the operating system in a local computing device to a remote computing device are intercepted, modified and redirected to transmit NICs selected by the hash engine for transmission to remote computing devices. Similarly, address resolution protocol (“ARP”) response packets sent by the operating system in response to ARP request packets are intercepted, modified and redirected to receive NICs selected by the hash engine for transmission. By selecting receive NICs and transmit... |
| Method for monitoring ber in an infiniband environment | 20080285453 | 20081120 |
| A method is disclosed for tuning each channel of a high-speed SerDes cable link interface arranged in a configuration linking a local side physical layer to a remote side physical layer. The method includes initiating an operational state of high-speed SerDes cable link interface, identifying flow-control packet Op codes not cited for use by operational high-speed SerDes cable link interface, transmitting a flow control signal from the local side physical layer to the remote side physical layer to control the remote side physical layer to monitor the bit error rate (BER) of the channels used by the local side physical layer to transfer data to the remote side physical layer, monitoring the BER in the channels used for data transfer, transferring BER data acquired in the... |
| Method and apparatus for encoding data for transmission in a communication system | 20080285521 | 20081120 |
| A method and apparatus for encoding data for transmission in a communication system provides increased efficiency in bandwidth utilization through higher data rates, lower error rates, lower power levels, and/or increased capacity. A set of orthogonal codes is partitioned into subsets. The data to be transmitted is partitioned into packets of bit sequences, each of which is mapped to an orthogonal code in an assigned subset. The number of members in a particular subset is determined by the relative transmission requirements of the data signal the subset will be used to encode.
... |
| Intelligent load balancing and failover of network traffic | 20080285553 | 20081120 |
| A hash engine in a network device driver maintains data on the utilization and error rate for each network interface card (“NIC”) within a local computing device. From this data, the hash engine intelligently selects transmit NICs and receive NICs based on various networking parameters provided from a software driver program. Transmit packets sent from the operating system in a local computing device to a remote computing device are intercepted, modified and redirected to transmit NICs selected by the hash engine for transmission to remote computing devices. Similarly, address resolution protocol (“ARP”) response packets sent by the operating system in response to ARP request packets are intercepted, modified and redirected to receive NICs selected by the hash engine for transmission. By selecting receive NICs and transmit... |
| Thermally stable reference voltage generator for mram | 20080279027 | 20081113 |
| A non volatile memory device comprises memory cells such as MRAM cells, reading circuits and a reference cell for generating a reference for use by the reading circuits, and can determine if the reference is degraded by thermal instability. This can help reduce a data error rate. Detecting such degradation can prove to be more effective than trying to design in enough margins for the lifetime of the device. The reference cell can be less susceptible to degradation than other cells by using different shape of cells and different write currents. Where each reference cell is used by many memory cells, the reference cell tends to be used more often than any particular memory cell and so can be more susceptible to degradation. Another way of... |
| Channel control based on error correction values | 20080279092 | 20081113 |
| A computing device configured for wireless communication may effectively control adaptation to channel conditions. The device may be configured to identify and classify conditions impacting performance of a channel so that appropriate adaptations may be made. Interference may be detected by correlating received signal strength and packet errors. High received signal strength correlated to a high packet error rate may signify presence of a source of interference. Once a source of interference is detected, other criteria may be used to determine the nature of the interference so that an adaptation that is minimally disruptive of applications can be selected. Additionally, channel degradation may be predicted by monitoring trends in error rates, including Forward Error Correction rates, and adaptation may be used before packet error rates exceed... |
| Interference detection | 20080279093 | 20081113 |
| A computing device configured for wireless communication may effectively control adaptation to channel conditions. The device may be configured to identify and classify conditions impacting performance of a channel so that appropriate adaptations may be made. Interference may be detected by correlating received signal strength and packet errors. High received signal strength correlated to a high packet error rate may signify presence of a source of interference. Once a source of interference is detected, other criteria may be used to determine the nature of the interference so that an adaptation that is minimally disruptive of applications can be selected. Additionally, channel degradation may be predicted by monitoring trends in error rates, including Forward Error Correction rates, and adaptation may be used before packet error rates exceed... |
| Method for transmitting control information, and method for generating codeword for the same | 20080279296 | 20081113 |
| A method for transmitting downlink control information and a method for generating a codeword for the same are disclosed. In generating a long code having a low code rate, a basic code of which minimum distance between codes is maximized is repeated by a prescribed number of times and bits of the repeated code are adjusted. Therefore, a minimum distance condition between codes of a long code is satisfied and simultaneously the code can be simply generated. Furthermore, control information can be transmitted with a low error rate by using the generated code.
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| System and method for broadcasting page messages in poor coverage regions | 20080280630 | 20081113 |
| A system and method for paging wireless mobile devices selectively varies the effective modulation order of a paging channel to achieve improved coverage in a wireless wide area network (WWAN) cell. In one embodiment, the paging channel modulation order is selected based on a measured signal strength and/or common channel error rate. The selected modulation order is directly related to the quality of the channel environment. In another embodiment, a page message is segregated into base and extended components that are layer modulated. With layered modulation, wireless mobile devices in good coverage regions can successfully demodulate both the base and extended components to recover the entire page message. Wireless mobile devices in poor coverage regions can successfully demodulate the base component of the page message, and... |
| Use of line characterization to configure physical layered devices | 20080275929 | 20081106 |
| A method of optimizing filter performance through monitoring channel characteristics is provided. A signal enters a channel and a receiver receives the signal. The receiver includes a FIR filter to remove near-end transmitted interference and recover a far-end desired signal. The filter has storage elements configured as a shift registers to move the signal, multipliers to multiply the signal by a filter coefficient, an intermittent summer to combine the multiplied results into a replica of an interfering signal, a final summer to remove the replica from the receiver signal to provide direct and indirect monitoring of the signal, where direct monitoring includes time or frequency monitoring, and indirect monitoring includes monitoring signal to noise ratio, error magnitude or bit error rate. The filter is optimized according... |
| Information recording media and playback power determining method for signal playback | 20080267050 | 20081030 |
| A super resolution optical disk medium having an array of pits less than or equal in size to optical resolution is disclosed, wherein the pits are read by using heat generated within the medium upon irradiation of a read laser beam. A playback power determination method for use with the disk is also disclosed. A playback power level at which super resolution occurs is determined based on a bit error rate (bER) of the optical disk and the amplitude of a playback signal having a predefined signal pattern. In the optical disk, NR/SR is set to one (1) or less, where SR is the signal obtained from a high-temperature region in case the playback is performed in the state that the super resolution occurs, and NR... |
| Real-time internet error correction | 20080267077 | 20081030 |
| A real-time internet error correction method includes a transmitter side of a real-time internet connection adjusting it's transmitting speed periodically according to the real-time average internet error rate detected at a receiver side to reduce the quantity of packet loss. When the error rate received at transmitter side is greater than the standard set by the user, the transmitter side will automatically reduce its transmitting speed until the error rate once again fall below the standard. As a result, the method can prevent the situation when the real-time internet connection has high error rate, the transmitter side still send packets at full speed which will only result in more packet loss. Furthermore, the present invention further discloses an algorithm which can more precisely calculate the average... |
| Decision criteria for automated form population | 20080267505 | 20081030 |
| A method is provided for selecting fields of an electronic form for automatic population with candidate text segments. The candidate text segments can be obtained by capturing an image of a document, applying optical character recognition to the captured image to identify textual content, and tagging candidate text segments in the textual content for fields of the form. The method includes, for each of a plurality of fields of the form, computing a field exclusion function based on at least one parameter selected from a text length parameter, an optical character recognition error rate, a tagging error rate, and a field relevance parameter; and determining whether to select the field for automatic population based on the computed field exclusion function.
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| Efficient and simple bit error rate calculation on optical transport layer | 20080267622 | 20081030 |
| Transport network interfaces operate to transport for Optical Transport Unit frames over an Optical Transport Network. Besides FEC bits for the Optical Transport Unit frames, the transmitting transport network interface provides sequences of error-determining bits for the Optical Transport Unit frames sent on working and protection communications channels. There is at least one sequence for each Optical Transport Unit frame, the number of bits in the at least one sequence much smaller than the number of bits in the Optical Transport Unit frame. The receiving transport network interface determines the bit error rates for the working and protection channels from the sequences of error-determining bits without decoding said Forward Error Correction bits and can select the working and protection channels accordingly.
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| Antenna array for a hi/lo antenna beam pattern and method of utilization | 20080258986 | 20081023 |
| Antenna arrays configured to produce directional antenna beam patterns are described. An antenna array produces a Hi antenna beam pattern and a Lo antenna beam pattern. Based on received satellite information, a mechanically scanning directional antenna system operates to adjust the azimuth direction of the antenna between the two beam patterns to maintain optimum satellite signal reception at different geographical locations and different elevation angles. In one embodiment an antenna mechanically adjusts direction based on geographical location information such as latitude and longitude received by a Global Positioning System (GPS) receiver. In another embodiment, an antenna mechanically adjusts its direction based on received satellite quality metrics such as signal to noise ratio, bit error rate, and/or received power, and uses these signal quality metrics to track... |
| Apparatus and method for digital wireless communication | 20080260069 | 20081023 |
| In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a modulation type different from that for pilot symbols. In this way, it is possible to suppress deterioration of the accuracy in estimating the reference phase and amount of frequency offset by pilot symbols and improve the bit error rate characteristic in the signal to noise ratio in quasi-coherent detection with symbols whose symbol synchronization is not completely established.
... |
| Signal processing device and signal processing method | 20080253011 | 20081016 |
| A signal processing apparatus for processing a signal by a PRML method is provided with an A/D converter (4) for converting an analog signal into a digital signal; a first waveform equalizer (14) which is connected to the A/D converter (4), and amplifies a specific band of a signal to optimize data of a clock extraction system; a second waveform equalizer (15) which is connected to the A/D converter (4), and amplifies the specific band of the signal and performs waveform equalization to optimize data of a data processing system; a timing recovery logic circuit (11) which is connected to the first waveform equalizer (14), and extracts a reproduction clock; and a decoder (16) which is connected to the second waveform equalizer (15), and decodes data.
... |
| Optical pickup control circuit | 20070297303 | 20071227 |
| In an optical disc playback device, focus and tracking balance amounts are automatically adjusted to specified amounts. An error rate from an error correction circuit for performing error correction of data played back from an optical disk using the optical pickup is then measured, and if the measurement results are a specified threshold value or higher it is determined that the optical disc being played is an inferior disk. The focus and tracking balance amounts are then adjusted to as to reduce the error rate to a minimum level.
... |
| High-speed dispersion compensation control apparatus | 20070297804 | 20071227 |
| An optical signal, which is a low-speed signal superimposed on a high-speed phase modulated optical signal by intensity modulation, is used. In an optical receiver apparatus 40, a received signal is split, and one of the split signals is O/E converted and low frequency component alone is extracted via a filter 46. A clock is extracted from low-frequency component by CDR, and is compared with a preset frequency. Using the frequency difference obtained, dispersion compensation is performed with low accuracy. Next, the amount of phase control of the delay interferometer 21 is adjusted so that the amplitude of the electrical signal is maximized. An error rate is measured, and fine adjustment is performed to improve the error rate.
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| Bit error rate reduction buffer | 20070300104 | 20071227 |
| In a preferred embodiment, the invention provides a circuit for reducing bit error rates. A data recovery circuit recovers data from a first HSS link to differential bit pair inputs. Data from the differential bit pair outputs of the data recovery circuit drive differential bit pair inputs to a plurality of FIFOs. The data is then driven from a parallel output of the plurality of FIFOs to the parallel input of a synchronizer. The data is then driven from the parallel output of the synchronizer to the parallel input of a serializer. The serializer, through different bit pair outputs, drives a second serial HSS link.
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| Method and apparatus for isolating iic bus noise from a tuner in a television receiver | 20070291183 | 20071220 |
| A method and apparatus for isolating a noise intolerant device, e.g., a phase-lock loop of a tuner within a television receiver, from source of noise. In one embodiment, the apparatus isolates a phase-lock loop integrated circuit (IC) from the bus, by providing an isolation buffer that allows the receiver to only pass data to the tuner's phase-lock loop IC when a tune command is issued by a processor. When not being tuned, the IIC lines to the tuner are held HIGH by a buffer until needed again to perform the tuning function. This allows the demodulation circuitry to use a setting for a carrier tracking-loop that optimizes bit error rate performance.
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| Apparatus and methods for communicating using symbol-modulated subcarriers | 20070291639 | 20071220 |
| Apparatus and methods for selecting a transmit power level and subcarrier modulation assignments based on measured channel conditions to achieve a performance level for communications over a symbol-modulated subcarrier communication channel are provided. In some embodiments, the transmit power level may be changed depending on whether a desired packet error rate and/or a desired link data rate can be achieved based on selected subcarrier modulation assignments and a selected transmit power level.
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| Wireless communication system capable of switching protocol | 20070286102 | 20071213 |
| A wireless communication system comprising a management server, base stations, and a plurality of node terminals, wherein a wireless communication protocol to be applied is switched dynamically based on such indices as but error, packet error rate, the number of times of retransmitting packets, throughput/power consumption that may occur between each base station and nodes.
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| Error detection and recovery within processing stages of an integrated circuit | 20070288798 | 20071213 |
| An integrated circuit includes a plurality of processing stages each including processing logic 2, a non-delayed latch 4, a delayed latch 8 and a comparator 6. The non-delayed latch 4 captures an output from the processing logic 2 at a non-delayed capture time. At a later delayed capture time, the delayed latch 8 also captures a value from the processing logic 2. The comparator 6 compares these values and if they are not equal this indicates that the non-delayed value was captured too soon and should be replaced by the delayed value. The non-delayed value is passed to the subsequent processing stage immediately following its capture and accordingly error recovery mechanisms are used to suppress the erroneous processing which has occurred by the subsequent processing stages,... |
| Setting transmission length based on estimated error rate | 20070288829 | 20071213 |
| Based on an expected error rate for a wireless transmission, the length of the transmission may be limited so that the probability of an error in one or more particular data segments is no greater than a predetermined threshold value. The expected error rate and/or the threshold value may be periodically changed, based on various criteria.
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| Helical-scan-type magnetic tape recording and reproducing apparatus and magnetic tape recording and reproducing method | 20070279783 | 20071206 |
| A helical-scan-type magnetic tape recording and reproducing apparatus includes: a helical-scan-type recording head that is movable, while being attached to a distal end of an actuator, in a track width direction by displacement of the actuator itself to sequentially scan a magnetic tape; a helical-scan-type reproducing head that is movable, while being attached to a distal end of an actuator, in the track width direction by displacement of the actuator itself to sequentially scan a track on the magnetic tape recorded by the recording head; an error rate profile forming mechanism forming, by wobbling the reproducing head at each of plural points on the track, error rate profiles at the plural points; and a reproducing-head moving mechanism moving the reproducing head at the plural points, by... |
| Method and system for adjusting downlink outer loop power to control target sir | 20070281729 | 20071206 |
| A wireless communication system and method for controlling transmission power to maintain a received signal-to-interference ratio (SIR) as close as possible to a target SIR. A received quality is maintained as close as possible to a target quality based on block error rate (BLER). When a target BLER is converted to an initial target SIR, an error may occur due to a channel condition mismatch, since the target SIR required for the target BLER varies with channel conditions. An outer loop power control process is used to set a target SIR for each coded composite transport channel (CCTrCH) based on the required target BLER. The process adjusts a SIR step size parameter to maximize the convergence speed of the process.
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| Capacitor below the buried oxide of soi cmos technologies for protection against soft errors | 20070272961 | 20071129 |
| Disclosed is a semiconductor structure that incorporates a capacitor for reducing the soft error rate of a device within the structure. The multi-layer semiconductor structure includes an insulator-filled deep trench isolation structure that is formed through an active silicon layer, a first insulator layer, and a first bulk layer and extends to a second insulator layer. The resulting isolated portion of the first bulk layer defines the first capacitor plate. A portion of the second insulator layer that is adjacent the first capacitor plate functions as the capacitor dielectric. Either the silicon substrate or a portion of a second bulk layer that is isolated by a third insulator layer and another deep trench isolation structure can function as the second capacitor plate. A first capacitor contact... |
| Method and appartus for determining set value of write current of magnetic head | 20070273993 | 20071129 |
| Embodiments of the present invention help to efficiently determine the appropriate setting of the write current of a magnetic head relative to temperature. According to one embodiment, a test computer determines the set value of a write current as a function of temperature for each head device portion from the relationship between a write current and an error rate. A test execution controller sets a selected head device portion and a write current to an AE, and writes data on a magnetic disk using the components in a HDD. The test execution controller reads the written data, and the error rate of the data from an error correcting section. The test execution controller repeats the same process with the write current varied. Upon completion of the... |
| Estimation of ber performance | 20070274378 | 20071129 |
| A method to determine bit error rate (BER) for a given channel of a communication system includes determining a first statistical representation of at least one deterministic source of noise for the given channel. A parametric statistical representation having parameters that model non-deterministic noise is defined for the given channel and values for the parameters of the parametric statistical representation are estimated to provide a second statistical representation for the non-deterministic noise based on at least one of measurements and simulations performed for the given channel. The BER of the given channel is estimated as a function of the first and second statistical representations.
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| Wireless multimedia communication method | 20070274381 | 20071129 |
| A wireless multimedia communication method for improving wireless video transmission quality by using physical layer channel status information (CSI) in a video application layer. In this method, the transmitting end decides the maximum transmission rate (Rmax) of the system based on both SNR information of receiving antennas fed back from the receiving end and a bit error rate required by the system. At the same time, a hierarchical encoding method is used, in the video application layer, to divide a bit stream into a basic layer and an expansion layer. In a case of employing an FGS encoding method, the transmission is caused to start with the basic layer, and the number of bits is increased in the expansion layer just until the bit rate of... |
| Active test fuel cell for characterizing and qualifying cell-internal fuel cell components | 20070275287 | 20071129 |
| An active test fuel cell characterizes and qualifies cell-internal components to establish technical data on the cell-internal components to be tested at low assembly costs, at a low error rate and with a high degree of reproducibility of the measuring results. The test fuel cell includes two housing plates. One of the housing plates is coupled to a piston/cylinder unit whose piston acts on a pressure element which in turn applies a load to cell-internal component being tested.
... |
| Dynamic power adjusting device for viterbi decoder | 20070277081 | 20071129 |
| A dynamic power adjusting device for a Viterbi decoder is disclosed. The device includes a processing unit for receiving a plurality of data to be decoded, detecting whether the data to be decoded have any bit errors, and estimating a number of the bit errors of the data. The device further includes a control unit for receiving the bit errors and the number of the bit errors of the data detected by the processing unit, so as to enable the Viterbi decoder to perform decoding, and disable the Viterbi decoder after the Viterbi decoder has performed the decoding the number of times equivalent to the number of the bit errors. By way of the dynamic adjustment technique, coupled with the bit-error detection and estimation, workload of... |
| Control device of storage/reproduction mechanism | 20070268609 | 20071122 |
| In order to provide a control device for a storage and reproduction mechanism that can acquire a constant error rate without being affected by changes of atmospheric pressure, a control device comprises a storage medium for storing data, a head for conducting a storage/reproduction process of data on the storage medium, an error detection unit for detecting an error of the data read by the head, and a flying height control unit for controlling a flying height of the head in accordance with the error rate for correlating changes of the flying height due to the changes in the atmospheric pressure.
... |
| Method for digital wireless communications | 20070268987 | 20071122 |
| In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a modulation type different from that for pilot symbols. In this way, it is possible to suppress deterioration of the accuracy in estimating the reference phase and amount of frequency offset by pilot symbols and improve the bit error rate characteristic in the signal to noise ratio in quasi-coherent detection with symbols whose symbol synchronization is not completely established.
... |
| Methods for assembly of high fidelity synthetic polynucleotides | 20070269870 | 20071122 |
| Disclosed are methods of manufacturing synthetic DNAs, that is, DNAs made at least in significant part by chemical synthesis of nucleic acid polymers. Also provided are methods for assembling plural DNAs in the same pool by multiplexed assembly of synthetic oligonucleotides. In exemplary embodiments, the methods involve pre-amplification of one or more oligonucleotides using “universal” primers, reduction of the error rate in oligonucleotide and/or nucleic acid products, and sequence optimization and oligonucleotides design. Also provided are low-purity arrays of nucleic acids and methods for assembling nucleic acids using oligonucleotides obtained from low-purity arrays.
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| Correction method for a metric measurement of the quality of transmission in a communication system and device implementing the method | 20070270101 | 20071122 |
| The invention proposes a study of how the inaccurate knowledge of the propagation conditions and interferences and noise, affecting the received signal of a radio transmission, affects the reception and a measurement model used to estimate the quality of the transmission, in a digital radio signal receiver. Actual means to correct the measurement model and improve the accuracy of the estimation of the error rate, or any other indicator of the quality of the transmission, are proposed along with a device comprising such means.
... |
| Analog front end for a wireless device | 20070270110 | 20071122 |
| A novel amplifier for a wireless device is disclosed. The system employing the preferred embodiment can deliver a radio signal with output power up to 500 mW for 64QAM (48 Mb/s bit rate) modulation and a radio signal up to 700 mW for 16QAM (36 Mb/s bit rate) modulation with the packet error rate below 1%. The increase of the signal from 10 to 500 mW (64QAM modulation) thus increases the base station coverage area 50 times.
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| Technical solution to written calculations engineering of the digital engineering method for hybrid numeral carry system and carry line | 20070271326 | 20071122 |
| The present invention relates to the digital engineering method and the field of written calculation engineering, and it puts forward a new digital engineering method which could remarkably increase the computation speed and greatly reduce the error rate of written calculation. The present invention uses the “method of hybrid numeral carry system and carry line”, in which K common Q-ary numerals that participate in the computation of addition and subtraction are transformed into K or 2K numerals of hybrid numeral carry system, then said K or 2K numerals are added for the sum in the hybrid numeral carry system. “Adding by place” is performed from the lowest place or at each place at the same time, and the number of the sum is written into the... |
| Radio transmitting apparatus, radio receiving apparatus, radio transmitting method and radio receiving method | 20070263666 | 20071115 |
| A radio transmitting apparatus and the like for improving the reception error rate characteristic. In this apparatus, a data modulating part (121) modulates a data signal to provide a modulated symbol. A Q-inverting part (125) generates a symbol that corresponds to the modulated symbol provided by the data modulating part (121) and that, when combined with the modulated symbol, becomes a signal having a particular value. A multiplexing part (110) multiplexes the modulated symbol provided by the data modulating part (121) with the corresponding symbol generated by the Q-inverting part (125) to provide a multiplexed signal.
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| Wireless transmitting apparatus and pre-equalization method thereof | 20070263747 | 20071115 |
| A wireless transmitting apparatus capable of improving the reception error rate of a wireless receiving apparatus. In the inventive apparatus, a channel estimating part (122) acquires a propagation path estimated value. A control part (113) determines whether an estimation precision of the acquired propagation path estimated value is equal to or greater than a predetermined level. A pre-equalization (PE) part applies PE based on the acquired propagation path estimated value to a transport signal if it is determined that the estimation precision is equal to or greater than the predetermined level. Otherwise, the pre-equalization (PE) part avoids the PE application to the transport signal. An RF part (117) transmits the transport signal to which PE has been applied, and transmits the transport signal for which the... |
| Method, apparatus and system for self-aligning components, sub-assemblies and assemblies | 20070263963 | 20071115 |
| Method, apparatus and system for self-aligning components, sub-assemblies and/or assemblies wherein actuators are used to physically move the components, sub-assemblies and/or assemblies such that an appropriate alignment is provided. The efficiency of the alignment may be determined with respect to a qualitative measurement (e.g., bit error rate, optical intensity and the like) of an output signal.
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| Packet loss measurement device and error rate measurement device using the same | 20070258383 | 20071108 |
| It is an object of the present invention to provide a packet loss measurement device capable of preventing a packet from being erroneously judged as being lost when packets transmitted through the same transmission path are received in an order different from the transmission order. In a packet loss measurement device 8 for measuring a packet loss on a transmission path by receiving packets respectively assigned with sequence numbers and transmitted in parallel through a plurality of transmission paths, the packet loss measurement device 8 comprises a counting unit 11 for counting the number of receptions of packets respectively assigned with sequence numbers for each of the sequence numbers, and a packet loss judging unit 12 for judging whether each of the packets is lost or... |
| Method for data communication via a voice channel of a wireless communication network | 20070258398 | 20071108 |
| A system and method for data communication over a cellular communications network that allows the transmission of digital data over a voice channel using a vocoder that operates in different modes depending upon characteristics of the inputted signal it receives. To prepare the digital data for transmission, one or more carrier signals are encoded with the digital data using one of a number of modulation schemes that utilize differential phase shift keying to give the modulated carrier signal certain periodicity and energy characteristics that allow it to be transmitted by the vocoder at full rate. The modulation schemes include DPSK using either a single or multiple frequency carriers, combined FSK-DPSK modulation, combined ASK-DPSK, as well as PSK with a phase tracker in the demodulator. These modulation... |
| Access point multi-level transmission power control supporting periodic high power level transmissions | 20070259659 | 20071108 |
| A wireless access point and multiple wireless terminals exchange utilization, status, mobility and reception characteristics. Each wireless terminal generates reception characteristics based on transmissions received from the wireless access point and from other devices in the network. In one operating mode, the characteristics gathered by the wireless devices are forwarded to the wireless access point, and, based on all received characteristics, the wireless access point selects its own transmission power for different types of the transmissions. The access point transmits to client devices at reduced power levels, however, periodic beacons and other selected non-beacon transmissions are transmitted at a high power level to facilitate association by other client devices. In another mode, all characteristics are exchanged between every wireless terminal and the access point so that... |
| Method for inspection process development or improvement and parts inspection process | 20070260342 | 20071108 |
| A method of developing or improving a parts inspection process, the method comprising: selecting at least one target part for inspection; convening a panel to review samples of the target part, and to define conditions and determine a disposition of the target part samples; conducting initial inspections of the target part samples to obtain sample inspection results; comparing the sample inspection results with the conditions and disposition of the target part samples set by the panel; determining a cause of variability between the sample inspection results and the conditions and disposition of the target part samples set by the panel and generating one or more solutions for the cause of variability; creating an inspection standard based on the one or more solutions; conducting training of inspectors... |
| Pilot signal transmission method and radio communication system for enabling measurement of reception quality with high accurancy | 20070253450 | 20071101 |
| In a pilot signal transmission method for raising the SIR measurement accuracy for transmission power control during high-speed transmission and thus reducing the block error rate and improving the throughput, a first SIR value measured by first pilot signals and second SIR value measured by second pilot signals are first compared, and the presence or absence of second pilot signals then determined in slot units based on the comparison results. When the second pilot signals exist, the second pilot signals are used in addition to the first pilot signals in the SIR measurement for high-speed closed-loop transmission power control. When the second pilot signals do not exist, only the first pilot signals are used in the SIR measurement for high-speed closed-loop transmission power control.
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| Adaptive control of head velocity during data storage device startup | 20060291086 | 20061228 |
| A control method is provided for loading a data transfer head to a data storage medium comprising: determining a desired maximum displacement between a parked position of the head and an encroaching position of the head in relation to a selected data storage track of the medium; determining a spin interval associated with a predetermined quantity of medium movement before the head reaches the encroaching position; rotating the data storage medium at a beginning of the spin interval; and moving the actuator during the spin interval from the parked position and at a velocity resulting in the head being displaced at the end of the spin interval a distance that is less than the maximum displacement. A data storage device is contemplated comprising programmed instructions for... |
| Transmission apparatus and transmission method | 20060291579 | 20061228 |
| A transmission apparatus capable of preventing both degrading of the error rate characteristic and deterioration of throughput caused by repeated retransmissions. In the apparatus, arrangement determination section 103 determines in an initial transmission to perform general constellation mapping, and determines in a retransmission to vary a constellation mapping position or vary a bit arrangement of each symbol according to the number of retransmissions. Data interchanging section 105 interchanges transmission data for each bit on a symbol basis to be in a bit arrangement determined by arrangement determining section 103. Mapper section 106 configures (maps) the transmission data input from data interchanging section 105 in each symbol to be mapped in the constellation mapping position determined in arrangement determining section 103.
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| Magnetic recording medium for high density recording | 20060292401 | 20061228 |
| A bit error rate is improved and, at the same time, an aging change due to thermal fluctuation is decreased. In one embodiment, a magnetic recording medium has first, second, third, and fourth magnetic layers stacked over the underlayer film on a substrate. The product (Brt2) of the residual magnetic flux density and film thickness of the second magnetic layer is smaller than the product (Brt3) of the residual magnetic flux density and film thickness of the third magnetic layer. The second magnetic layer has a thickness larger than that of the third magnetic layer and is anti-ferromagnetically coupled with the first magnetic layer by way of the first non-magnetic intermediate layer. The fourth magnetic layer is formed by way of a second non-magnetic intermediate layer... |
| Method and apparatus for sequential authentication using one or more error rates characterizing each security challenge | 20060294390 | 20061228 |
| Methods and apparatus are provided for sequential authentication of a user that employ one or more error rates characterizing each security challenge. According to one aspect of the invention, a user is challenged with at least one knowledge challenge to obtain an intermediate authentication result; and the user challenges continue until a cumulative authentication result satisfies one or more criteria. The intermediate authentication result is based, for example, on one or more of false accept and false reject error probabilities for each knowledge challenge. A false accept error probability describes a probability of a different user answering the knowledge challenge correctly. A false reject error probability describes a probability of a genuine user not answering the knowledge challenge correctly. The false accept and false reject error... |
| Robust non-coherent receiver for pam-ppm signals | 20060285578 | 20061221 |
| A robust method and system for communicating via ultra-wideband (UWB) radio transmission signals over multi-path channels with a very broad range of delay spread. The system includes an optimized non-coherent receiver structure of low complexity and potentially very low power consumption, while offering robust error rate performance for a wide variety of UWB multi-path channel. Use of the proposed transmission signals, referred to as combined PAM-PPM (pulse amplitude modulation-pulse position modulation) signals, together with the disclosed non-coherent receiver method and apparatus are applicable in any UWB communication, identification, sensor or localization system and network, where battery power consumption must be minimized without undue system performance degradation. In particular, timing recovery and synchronization methods and embodiments for bipolar 2PPM (two-slot PPM) signals are disclosed, enabling the construction... |
| Integrated maximum a posteriori (map) and turbo product coding for optical communications systems | 20060285852 | 20061221 |
| An integrated maximum a posteriori equalization and turbo product coding (IMAP-TPC) system for optical fiber communications systems (OFCS) is provided that uses probabilistic characterization of the electrical current in the presence of inter-symbol interference (ISI) and noise to compensate their effects and improve the bit error rate. In the IMAP-TPC system, turbo product code (TPC) decoding is integrated with a symbol-by-symbol maximum a posteriori (MAP) detector. The MAP detector calculates the log-likelihood ratio of a received symbol using the conditional electrical probability density information, and hence obtains a much more accurate reliability measure than the traditional measure used in the TPC decoder.
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| Semiconductor device for reducing soft error rate with reduced power consumption | 20060279318 | 20061214 |
| A semiconductor device is composed of a first circuit receiving a first power supply voltage; and a second circuit receiving a second power supply voltage. The second power supply voltage is higher than the first power supply voltage. Such device arrangement is effective for reducing the soft error rate, when the second circuit is more susceptive to a soft error than the first circuit, especially when the second circuit is a memory device.
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| Soft-error rate improvement in a latch using low-pass filtering | 20060279343 | 20061214 |
| In a preferred embodiment, the invention provides a circuit and method for reducing soft error events in latches. A low-pass filter is placed between the output of a forward inverter and the inputs of a feedback keeper. The first and second outputs of the low-pass filter are connected to first and second inputs respectively of the feedback keeper. The only type of diffusion connected to the first output of the low-pass filter is a P-type diffusion. The only type of diffusion connected to the second output of the low-pass filter is an N-type diffusion. The feedback keeper is connected to an input of the forward inverter.
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| Information read device and read signal processing circuit | 20060280240 | 20061214 |
| An optical disk read signal processing system for Blu-ray disc systems to ensure stable phase-locked locked operation even with a low signal-to-noise ratio. This system changes a loop configuration of a phase lock loop circuit according to the operating state, and utilizes a FIR equalizer for phase detection. This system attains a low error rate even when the signal-to-noise ratio of an input signal is low, and avoids pulse edges with low phase detection accuracy or signal pulse streams with a high possibility of being mistakenly detected as an edge in conventional methods, and also supports diverse types of input signals.
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| Method and apparatus for testing a wireless link using configurable channels and rates | 20060274667 | 20061207 |
| Techniques to test a wireless communication link using configurable channels and rates. A W-Markov test service may be invoked to test and/or verify the performance of the downlink and/or uplink using at least one transport channel for each link. Each transport channel may be individually configured. The W-Markov test service supports generation of test data based on a defined data sequence or a pseudo-random number generator. The testing may be performed based on a particular deterministic or pseudo-random activity model. For voice call testing, a first-order Markov model may be used to model voice activity and to select the rate to use for each transmission time interval (TTI). For Adaptive Multi-Rate (AMR), testing may be performed based on configurable AMR rates and silence descriptor (SID) types.... |
| Method and system for adaptive control of sub-carriers | 20060274839 | 20061207 |
| A method and system for adaptive control of sub-carriers is useful for increasing frequency diversity gain to improve bit error rate performance in an Interleaved Frequency Division Multiple Access (IFDMA) system. The method includes selecting a combination of a Repetition Factor (RF) and a repetition block size (Q), from possible combinations of a RF and a Q, based on a number of users (Nu) (step 1405). A Spreading Factor (SF), Forward Error Correction (FEC) coding rate (R), or modulation order (M) based on the Nu is then determined (step 1410). Control signals are then provided based on the RF and Q, and based on the SF, R, or M (step 1415).
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| Adaptive radio resource management for wireless local area networks | 20060277450 | 20061207 |
| A method for determining whether a data transmission rate in a wireless communication system is appropriate for current system conditions begins by calculating a frame error rate (FER) for a given period of time and obtaining a current data rate. If the current data rate is greater than a minimum data rate and the FER is a high value, then the system switches to a lower data rate. If the current data rate is greater than a minimum data rate and the FER is less than a high value, then the system maintains the current data rate. If the current data rate is less than a maximum data rate and the FER is a low value, then the system determines whether a higher data rate can... |
| Method and apparatus for sorting particles | 20060266679 | 20061130 |
| A method and apparatus for sorting particles moving through a closed channel system of capillary size comprises a bubble valve for selectively generating a pressure pulse to separate a particle having a predetermined characteristic from a stream of particles. The particle sorting system may further include a buffer for absorbing the pressure pulse. The particle sorting system may include a plurality of closely coupled sorting modules which are combined to further increase the sorting rate. The particle sorting system may comprise a multi-stage sorting device for serially sorting streams of particles, in order to decrease the error rate.
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| Method and apparatus for monitoring transmission quality | 20060268968 | 20061130 |
| In wireless communications, it is necessary to monitor the transmission quality of communications channels to maintain system performance and operation. The invention provides a way of measuring bit error rates in channels at the receiver, without diminishing channel throughput by inserting quality monitoring data into the signal at the transmitter.
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| Magnetic recording medium for longitudinal recording | 20060269793 | 20061130 |
| A longitudinal magnetic recording medium having high medium S/N ratio, no problem for overwriting characteristics, excellent bit error rate and also sufficient thermal stability is provided. In one embodiment, a medium has a substrate, an underlayer film formed above the substrate, a magnetic film formed by stacking a first magnetic layer, a second magnetic layer, a third magnetic layer, a non-magnetic intermediate layer and a fourth magnetic layer over the underlayer film, and a protective film formed over the magnetic film, in which each of the magnetic layers of the magnetic film comprises a cobalt-based alloy containing chromium, the first magnetic layer has the least thickness among all the magnetic layers, the second, the third and the fourth magnetic layer each further contain platinum and boron,... |
| Method and apparatus for determining the closed loop power control set point in a wireless packet data communication system | 20060270358 | 20061130 |
| According to one aspect of the invention, a method for determining a power control set point is provided. In one embodiment, the power control set point is determined based on one or more factors including a first factor corresponding to a pilot bit error rate, a second factor corresponding to a normalized signal variance, and a third factor corresponding to an average number of fingers in lock.
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| Method of controlling power | 20060270435 | 20061130 |
| A method of controlling power of a data channel, said method comprising the steps of defining for said channel a target value for a layer 1 block error rate L1 BLER and controlling the power of said data channel based on said target value.
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| Mobile communication terminal | 20060270441 | 20061130 |
| A mobile communication terminal performs an antenna picture display according to the received signal power measured by a received signal measurement means and the base station transmission conditions acquired by a base station transmission condition acquisition means. Therefore, the display of a large number of antenna pictures regardless of a high error rate at the receiving-end does not occur and the user does not become confused. As a result, the antenna picture display method when using multicast services is improved and user-friendliness is enhanced.
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| Method and apparatus for communication channel error rate estimation | 20060262754 | 20061123 |
| A wireless communication device or system generates transmit power control feedback for a received power control channel by determining a command error rate (CER), or by identifying a target signal quality for the power control channel according to a defined signal-quality-to-CER mapping function. Generally, the power control channel does not include error-coded data to use for CER estimation. However, in one embodiment, the channel does include known reference bits that are evaluated for CER estimation, with the estimated CER used to set the signal quality target for inner loop power control. In other embodiments, a computed reception error probability is used to identify a CER estimate according to a defined probability-to-CER mapping function. By way of non-limiting example, these embodiments may be used to provide power... |
| Wireless diagnostic systems | 20060264178 | 20061123 |
| Wireless diagnostic systems and methods of implementing wireless diagnostic analysis between at least one end point device and at least one wireless diagnostic device/probe, each including a wireless transceiver that enables wireless communication therebetween. The wireless diagnostic device could be a bit error rate tester, a protocol analyzer, a generator, a jammer, a monitor, and the like. The end point devices can be storage devices, LAN ports, computer systems, SAN ports, wireless RAIDS, network taps, and the like.
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| Multi input multi output wireless communication reception method and apparatus | 20060256888 | 20061116 |
| A Multi Input Multi Output (MIMO) Wireless Communication Reception Method and Apparatus are proposed whereby in a 2-way wireless communication system with scattering propagation channels, where several data sub-streams are simultaneously transmitted from a transmitting side to a receiving side, and where no channel information is necessarily available at the transmitting side, excellent Symbol Error Rate performance is a achieved, in some cases quasi-optimal, at a complexity scaling almost quadratically with the number of transmitted sub-streams and independent of the constellation order.
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| Systems and methods for decoding forward error correcting codes | 20060259849 | 20061116 |
| Systems and methods are disclosed that can improve the performance of decoders of forward error correcting codes by using the information contained in late packet arrivals to update (or recompute) the state of the decoder. The systems and methods of the disclosed embodiments are generally applicable to decoders that maintain state information in decoding successive bits or information frames. The systems and methods disclosed herein can improve the performance (i.e., the bit error rate) of the decoder since the recomputed state is exactly the state that the decoder would have had if the information contained in the late packet had originally arrived on time and been decoded in a usual manner. In effect, the updating of the decoder state following a late packet arrival terminates the... |
| Interspersed training among data | 20060250285 | 20061109 |
| A communications system, having a combination Reed-Solomon encoder and a Turbo-Code encoder Data frame configuration which may be changed to accommodate embedded submarkers of known value are embedded in with the data order to aid synchronization in the receiver system, by providing strings of known symbols. The string of known symbols may be the same as the symbols within a training header that appears at the beginning of a data frame. Frame parameters may be tailored to individual users and may be controlled by information pertaining to receivers, such as bit error rate, of the receiver. Additional headers may be interspersed within the data in order to assist in receiver synchronization. Frames of data may be acquired quickly by a receiver by having a string of... |
| Method and test device for detecting an error rate | 20060250972 | 20061109 |
| A method and device for detecting an error rate of a receiver of data transmitted to a device that is to be checked is provided. A test device generates a data block having a first length and a test signal generated based on the data block is sent. The device to be checked receives and evaluates the test signal. Another data block having a different length is generated based on the evaluated test signal to obtain another data rate. The other data block is sent as a response signal in a different transmission direction, and is received and evaluated by the transmitter/receiver device of the test device. An evaluation unit compares the contents of both data blocks to detect the error rate, wherein the content of... |
| Method and apparatus for improving the error rate of track information on a magnetic storage device | 20060245102 | 20061102 |
| An apparatus and method for improving the error rate of track information on a magnetic storage device is disclosed. One embodiment provides a counter for counting the number of writes to a first track on a magnetic storage device. In addition, a re-read and re-write initiator is provided for reading information from a second track adjacent to the first track and re-writing the information read from the second track back to said magnetic storage device when said counter reaches a pre-defined number of writes for the fist track.
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| Timing control in orthogonal frequency division multiplex systems based on effective signal-to-noise ratio | 20060245347 | 20061102 |
| A spread-spectrum communication system provides an effective signal-to-noise ratio (SNR) of received orthogonal frequency division multiplex (OFDM) slots in the presence of timing errors. Effective SNR can serve as a diagnostic tool for determining whether there was a timing error when a measured packet error rate (PER) remains high, and a predicted PER from the effective SNR remains low. A loop can use the effective SNR to control a time reference used by an OFDM decoder.
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| Digital broadcasting receiving terminal with reception quality indicator | 20060248412 | 20061102 |
| A terminal for receiving digital broadcast signals includes signal receiving components for receiving a digital broadcast signal, and a first error rate detection unit for detecting a first bit error rate (BER) of the digital broadcast signal before the digital broadcast signal is decoded by a decoder. The terminal also includes a second error rate detection unit for detecting a second bit error rate (BER) of the digital broadcast signal after the digital broadcast signal is decoded by the decoder, and a packet error rate detection unit for detecting packet error rate (PER) of the digital broadcast signal. The terminal typically further includes a controller for determining reception quality of the digital broadcast signal based upon a value of the first BER, or the second BER,... |
| Low power transmission provisioning for wireless network devices | 20060239217 | 20061026 |
| A process for secure, safe, and easy provisioning of a wireless device with credentials to connect to a wireless network. A connecting wireless device and an established wireless device both utilize low power transmission at close proximity to exchange wireless connection setting information and/or a password. The connecting wireless device is moved into proximity with the established wireless device and a low power setting is discovered at which the wireless devices may communicate with a sufficiently low error rate. The connecting wireless device is then passed the secret information by the established network device.
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| Data transmission method for wireless network | 20060239293 | 20061026 |
| Disclosed is a device and method that relates to radio engineering and especially to data transmission in a wireless local area network. The method improves the throughput of the wireless local area network, by selecting a transmission rate, data transmission mechanism and a fragment size which maximize the network throughput considering the receiving conditions on the receiving station (bit error rate in the transmitted data units of the transmitting station) and taking into account the current network loading are selected for transmission of data units.
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| Qkd system detector autocalibration based on bit-error rate | 20060239460 | 20061026 |
| In a quantum key distribution (QKD) system, a method of autocalibrating the gating of a single-photon detector (SPD) unit is disclosed. The method includes exchanging photon signals (P1, P2) to establish a bit-error rate (BER). The method also includes performing a detector gate signal timing scan (314) that varies the signal arrival time (T) to establish an optimum arrival time (TMIN) corresponding to an optimum (e.g., minimum) BER. Detector gate signal timing dithering is then performed (318). This involves varying the detector gate signal arrival times about the optimum arrival time to ensure that the QKD system operates at or near an optimum BER.
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