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Apparatus and methods of frequency spectrum usage in a wireless communication system

Method and system for adaptive coding and modulation (acm) for supporting mesh network connectivity for multipoint…

Magnetic resonance imaging apparatus and magnetic resonance imaging method

Date/App# patent app List of recent Center Frequency-related patents
09/04/14
20140249418
 Ultrasound diagnostic imaging apparatus patent thumbnailUltrasound diagnostic imaging apparatus
Disclosed is an ultrasound diagnostic imaging apparatus including an ultrasound probe which outputs transmission ultrasound toward a subject due to a pulse signal being input and which outputs a received signal by receiving reflected ultrasound from the subject, and a transmission unit which makes the ultrasound probe generate the transmission ultrasound by outputting a pulse signal whose drive waveform is formed of rectangular waves. The frequency power spectrum of the pulse signal has intensity peaks in a frequency band included in a transmission frequency band at −20 db of the ultrasound probe on a low frequency side and a high frequency side of a center frequency of the transmission frequency band, respectively, and intensity of a frequency region between the intensity peaks is −20 db or greater with a maximum value of intensity among the intensity peaks being a reference..
09/04/14
20140248917
 Apparatus and methods of frequency spectrum usage in a wireless communication system patent thumbnailApparatus and methods of frequency spectrum usage in a wireless communication system
Techniques of frequency spectrum usage in a wireless communication system include configuring two or more downlink carriers, each having a downlink carrier center frequency, to have a total occupied bandwidth that is constrained within an allocated downlink frequency spectrum. Further, the techniques include transmitting, to a user equipment (ue), two or more downlink carrier center frequency indicators that each identify a downlink carrier center frequency of each of the two or more downlink carriers.
08/28/14
20140243031
 Method and system for adaptive coding and modulation (acm) for supporting mesh network connectivity for multipoint networks patent thumbnailMethod and system for adaptive coding and modulation (acm) for supporting mesh network connectivity for multipoint networks
A method of provisioning a communications link between remote terminals within a hub-spoke network comprising receiving, by a first remote terminal, information about a second remote terminal from a hub, selecting, by the first remote terminal, a modulation factor, coding rate, symbol rate, center frequency, and power level based on the information received about the second remote terminal, transmitting, by the first remote terminal, a signal using at least one of the selected modulation factor, coding rate, symbol rate, center frequency, and power level, to the second remote terminal such that a communications link is created, and adjusting the modulation factor, coding rate, symbol rate, center frequency, or power level of the transmitted signal such that performance of the link is increased while maintaining a presence of the link.. .
08/28/14
20140239950
 Magnetic resonance imaging apparatus and magnetic resonance imaging method patent thumbnailMagnetic resonance imaging apparatus and magnetic resonance imaging method
In one embodiment, an mri apparatus (10) includes a gap calculating unit (65), a candidate calculating unit (66) and a sequence setting unit (61). The gap calculating unit calculates a gap between the center frequency of an rf pulse and a resonance center frequency, after start of a pulse sequence.
08/21/14
20140233957
 Optical signal processing apparatus, transmission apparatus, and optical signal processing method patent thumbnailOptical signal processing apparatus, transmission apparatus, and optical signal processing method
An optical signal processing apparatus includes: an optical frequency comb generation unit configured to generate an optical frequency comb; an extraction unit configured to extract a plurality of optical components having a certain frequency interval between the optical components from the optical frequency comb; and an optical carrier generation unit configured to multiplex the plurality of optical components with reference light to thereby generate an optical carrier having a center frequency away from the center frequency of the reference light by an integer multiple of the frequency interval.. .
08/21/14
20140232405
 Magnetic resonance imaging apparatus patent thumbnailMagnetic resonance imaging apparatus
A magnetic resonance imaging apparatus of an embodiment includes: an imaging condition setting section configured to set an imaging condition for a main scan, a preparatory scan performing section configured to repeat a preparatory scan to be performed by the use of the imaging condition for a main scan and a changeably inputted center frequency so as to generate a preparatory image in real time, a display section on which the preparatory image can be displayed in real time, an optimum center frequency setting section configured to change the center frequency so as to change a situation in which a banding artifact appears and configured to set an optimum center frequency according to a user operation based on an observation of the preparatory image, and a main scan performing section configured to reconstruct an image for a diagnosis by using the optimum center frequency having been set.. .
07/31/14
20140210673
 Dual-band antenna of wireless communication apparatus patent thumbnailDual-band antenna of wireless communication apparatus
A dual-band antenna of a wireless communication apparatus includes a first radiation part for receiving or transmitting signals at a first frequency band; a second radiation part for generating a coupling effect together with the first radiation part to receive or transmit signals at a second frequency band having a center frequency lower than a center frequency of the first frequency band, wherein the second radiation part comprises multiple radiation sections, and at least one of the multiple radiation sections is positioned on a first plane; a feeding element for coupling with a signal receiving terminal of the wireless communication apparatus; and a shorting element for coupling with a fixed-voltage region of the wireless communication apparatus. The first radiation part does not physically contact with the second radiation part, and at least a portion of the first radiation part is not positioned on the first plane..
07/17/14
20140199956
 Tunable filter devices and methods patent thumbnailTunable filter devices and methods
Analog interference filter devices and methods for isolation of desirable portions of a radio frequency signal. Signal compensation is used to provide desirable center frequency, passband width, ripple, rolloff, stopband and distortion performance.
07/17/14
20140198878
 Method for designing band pass delta-sigma modulator, band pass delta-sigma modulator, signal processing device, and radio transceiver patent thumbnailMethod for designing band pass delta-sigma modulator, band pass delta-sigma modulator, signal processing device, and radio transceiver
F0 is a center frequency of a quantization noise stop band of the band pass delta-sigma modulator.. .
07/17/14
20140198862
 Communication device and communication system patent thumbnailCommunication device and communication system
A transmitter includes a generation section that generates a baseband ofdm signal based on transmission data, and a transmission section that transmits a communication signal that is based on a real-part signal that is obtained by removing an imaginary-part signal from the baseband ofdm signal. In the baseband ofdm signal, the data signal including the transmission data is superimposed on subcarriers that are given numbers equal to or less than n/2−1, and the data signal is not superimposed on subcarriers that are given numbers more than n/2−1, where n (n is an integer) subcarriers included in the baseband ofdm signal are numbered by integers from 0 to n−1 in ascending order with respect to the center frequency of each subcarrier..
07/10/14
20140192706
Method and system for frequency reuse in wireless relay scenario
The disclosure provides a method for frequency reuse in a wireless relay scenario, wherein a center frequency spectrum, an edge frequency spectrum and a random access frequency spectrum are pre-allocated to a cell according to a scenario parameter in the cell; load conditions of all mobile stations (mss) covered by each relay station (rs) in the cell is calculated and reported to a base station (bs); the bs allocates the random access frequency spectrum to an rs according to load conditions of all rss and schedules mss. The disclosure also provides a system for frequency reuse in a wireless relay scenario.
07/03/14
20140187925
Synthetic aperture image reconstruction system in a patient interface module (pim)
A field programmable gate array (fpga) circuit including a quadrature internal conditioning circuit is provided. The circuit having a buffer circuit; and a reconstruction engine circuit, wherein the reconstruction engine circuit includes: a circuit to measure a phase of a signal; and a flavor interpolation circuit; wherein: the circuit to measure the phase of a signal includes digitization points forming two complex numbers for each cycle of the center frequency of the signal.
07/03/14
20140184216
Systems and method to substantially mitigate ac stark shift effects in a sensor system
One embodiment includes a sensor system. The system includes a cell system comprising a pump laser configured to generate a pump beam to polarize alkali metal particles enclosed within a sensor cell.
06/26/14
20140177520
Bonded pseudo hemispherical beam operation for spot beam environments
A method of creating a pseudo hemispherical beam using a plurality of individual spot beams comprising receiving by a single router or packet processor, user data from a plurality of users, processing the user data by the single router or packet processor using a qos logic such that a single output comprising a plurality of queues of data results, each queue of data comprising data designated for transmission only to one or more predetermined remote receivers, modulating the plurality of queues of data received using a multiple-carrier modulator such that a single output comprising a plurality of individual spot beams results, wherein each individual spot beam has a unique center frequency and carrier signal configuration, and transmitting the plurality of individual spot beams to a repeating relay configured to transmit each individual spot beam to the one or more predetermined remote receivers.. .
06/26/14
20140176364
Methods of processing a radio frequency signal, signal processing devices for carrying out the methods, radio frequency front-ends, radio receivers and gnss receivers
A radio frequency signal is frequency-translated to form a complex first intermediate signal where a frequency corresponding to a gps center frequency is at an intermediate frequency. In a multiplexing conversion unit a complex multiplexed conversion signal which assumes different conversion frequencies is derived from a clock signal where the frequency of the latter is divided alternately by one of two divisors in a divider circuit and further by two in a phase shifter.
06/19/14
20140172339
Automatic center frequency and span setting in a test and measurement instrument
A test and measurement instrument having initial display center frequency and span settings and configured to process an input signal is disclosed. The test and measurement instrument includes a processor configured to digitize the input signal and locate a primary peak and determine a primary peak center frequency of the input signal.
06/19/14
20140169194
Method, system and program product for detecting wireless interferers
A method, system and program product comprise generating spectral samples from at least one radio communication device being configured to be operable as an observer of transmissions within a frequency band divided into one or more sub-bands associated with communications of the radio communication device. The spectral samples at least comprise signal levels and timing information for observed signals within the sub-bands.
06/19/14
20140168170
Iphone frequency sensor/magnifier application
Devices, using emitted acoustic signals and received vibrations, determine resonant frequencies of a surface or other object, and determine useful information about that surface, including size, thickness, and material. Received vibrations include impulse vibrations from striking that surface with a finger or stylus, or from a frequency or from a swept-sinusoid emitted by the device.
06/19/14
20140167775
Systems and methods for measuring high frequency resistance in a fuel cell system
System and methods for measuring operating parameters of a fuel cell system are presented. In certain embodiments, the systems and methods may be configured to measure a high frequency resistance of a fuel cell system.
06/12/14
20140161096
Wireless communication device and wireless communication method
A wireless communication device includes a wireless communication module and an allocator. The wireless communication module wirelessly communicates with a plurality of other wireless communication devices.
06/12/14
20140160915
Communication device and communication system
A preamble signal is an ofdm signal, and is a real-part signal obtained by removing an imaginary-part signal from a signal in the time domain that is generated by an ifft process being performed on a signal in the frequency domain obtained by assigning preamble data to subcarriers in accordance with a predetermined arrangement pattern. The predetermined arrangement pattern indicates that preamble data is assigned to any of subcarriers given numbers equal to or less than n/2−1 and the preamble data is not assigned to subcarriers given numbers more than n/2−1, where a plurality of subcarriers are numbered by integers from 0 to n−1 (n is an integer) in ascending order with respect to the center frequency of each subcarrier..
06/12/14
20140159833
Elastic wave device
A reflector of the elastic wave resonator in an elastic wave device has first and second regions. The second region has third and fourth regions.
06/05/14
20140155116
Dynamic operating bandwidth configuration for an envelope tracker
A communication device, such as a smart phone, receives operational parameters from a network controller. The operational parameters may include, as examples, bandwidth allocation, center frequency, and receive/transmit band assignments.
05/22/14
20140141779
Method for performing a cooperative operation between heterogeneous networks and device for same
The present invention relates to a method for performing a cooperative operation between heterogeneous networks and a device for same. A method for a first type base station to perform a cooperative operation between heterogeneous networks in a wireless communication system includes receiving a downlink synchronization channel from at least one second type base station; obtaining an identifier (id) of the second type base station by using the received downlink synchronization channel; and transmitting at least one of a channel number and a bandwidth of a center frequency of the first type base station and the cell id of the second type base station to a server.
05/15/14
20140132464
Glass antenna for vehicle
A glass antenna provided on vehicle side glass has a power feeding portion disposed at side portion of the side glass, a main element connected to the power feeding portion and a square bracket-shaped element whose one end is connected to some midpoint of the main element. When frequency band of fm broadcast wave received by the antenna is divided into two frequency bands with respect to its center frequency, wavelength of center frequency of frequency band of low frequency is λ, and wavelength of center frequency of frequency band of high frequency.
05/08/14
20140123757
Method for measuring mechanical resonance frequency using servo driver
A method of measuring mechanical resonance frequency using a servo driver including the steps of: having the servo driver work under a torque control mode, by applying in the servo driver a preset torque drive signal, the motor drives the mechanical components in a microvibration state; collecting actual speed signals of the motor to obtain the actual speed signal sequence of the motor; the actual speed signal sequence of the motor being passed in sequence through a certain number of band-pass filters having a fixed pass-band frequency and different center frequencies to obtain filtered speed signals; the filtered speed signal sequences output from each of the band-pass filters being changed into absolute values and then accumulated to obtain accumulation values; comparing the accumulation values obtained from the signal sequences output from the certain number of band-pass filters, and the center frequency of the band-pass filter corresponding to the largest accumulation value being the mechanical resonance frequency. By using the method, an automatic measurement of the mechanical resonance frequency of a mechanical device can be achieved..
05/01/14
20140123194
Single-cable automatic ird installation procedure
A method, apparatus, system, and computer program product for auto-installing an integrated receiver/decoder (ird) includes issuing an auto-installation command from the ird to an outdoor unit (odu) and receiving a plurality of tones from the odu in response to the auto-installation command, each tone representing a center frequency of available user bands (ubs). The auto-installation also includes acquiring a ub center frequency by the ird, requesting the odu to confirm a ub number corresponding to the acquired ub center frequency, and receiving confirmation from the odu that a ub number corresponds to the acquired ub center frequency.
05/01/14
20140120968
Frequency tunable transmit/receive (tx/rx) antenna switch
A frequency tunable transmit/receive (tx/rx) antenna switch uses a tuned pin diode rf switch topology (e.g. Shunt, series or series-shunt).
05/01/14
20140120857
Magnitude and phase response calibration of receivers
An integrated calibrator provides for magnitude and phase response calibration of rf receivers to produce amplitude flatness and phase linearity across the frequency range of the rf receiver by using a simple square law diode detector and a frequency-stepped two-tone source. A two-tone source generator provides two sinusoidal signals separated by a specified frequency delta about a center frequency.
05/01/14
20140118071
Compact broadband impedance transformer
The present invention is directed to an impedance transformation device for use in a system having a characteristic system impedance, the device being characterized by a predetermined bandwidth having a center frequency. The device housing size is one-eighth wavelength of the center frequency.
04/17/14
20140106698
Variable band pass filter device
A variable filter device has: a first series arm which is serially connected to a signal line, includes a variable capacitance and an inductance, and constitutes a series resonator; first and second parallel arms, which are connected between the signal line and the ground on both sides of the first series arm, each of which includes a variable capacitance and an inductance, and constitutes a grounded series resonator. The first series arm defines the center frequency of the pass band, and the first and second parallel arms define attenuation poles sandwiching the pass band..
04/17/14
20140105232
On-chip optical reference cavity exhibiting reduced resonance center frequency fluctuations
An optical apparatus comprises a waveguide substrate and an optical reference cavity. The optical reference cavity comprises an optical waveguide formed on the waveguide substrate and arranged to form a closed loop greater than or about equal to 10 cm in length.
04/17/14
20140105170
Method and apparatus of accessing channel in wireless communication system
A method and apparatus of accessing a channel including receiving, by a device, an operation element for setting up or switching at least one channel from an access point (ap), the operation element including a channel type field indicating whether the at least one channel is either a single channel or multiple channels, and including two channel center frequency segment fields indicating a channel center frequency of a primary and a secondary channel if the channel type field indicates that the channel is multiple channels, determining whether the primary channel is idle during a first interval, determining whether the secondary channel is idle during a second interval if the primary channel is idle, and transmitting data by using the primary and secondary channels to the ap or at least one station in a basic service set (bss) if the primary and secondary channel are idle.. .
04/03/14
20140093237
Optical channel monitor
In one example, an optical channel monitor includes a tunable filter, a deinterleaver, first and second optical receivers, and a control module. The tunable filter is configured to receive an optical signal having a plurality of channels spaced at a nominal channel spacing.
04/03/14
20140093236
Optical channel monitor
In one example, an optical channel monitor includes a tunable filter, a deinterleaver, first and second optical receivers, and a control module. The tunable filter is configured to receive an optical signal having a plurality of channels spaced at a nominal channel spacing.
04/03/14
20140092664
Associative memory oscillator array
An embodiment of the invention includes an analog associative memory, which includes an array of coupled voltage or current controlled oscillators, that matches patterns based on shifting frequencies away from a center frequency of the oscillators. The test and memorized patterns are programmed into the oscillators by varying the voltage or current that controls the oscillators.
03/20/14
20140080414
Systems and methods for collision avoidance in near-field communications
Systems, methods, and devices for wireless communication are included herein. An aspect of the subject matter described in the disclosure provides a device configured to detect a transmission.
03/20/14
20140079164
Full-range pilot-assisted frequency offset estimation for ofdm communication systems
A training symbol with two identical halves as well as a pilot-tone at a center frequency is used for both timing synchronization and carrier frequency offset estimation. A timing synchronization is achieved by finding a peak of a cross-correlation function of the two halves in the first symbol.
03/20/14
20140077904
Apparatus and method for tuning the frequency of a bandpass filter to an offset frequency around a carrier frequency
A novel frequency locked loop for tuning a bandpass filter to a small offset frequency around an rf center frequency is provided. The difference between the bandpass filter frequency and the rf center frequency is generated, a frequency locked loop is used to tune the frequency difference to a reference offset frequency..
03/13/14
20140073952
Methods and systems for conditioning a physiological signal using an adjustable bandpass filter
A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may apply a bandpass filter to the physiological signal to assist in the determination of the physiological information.
03/13/14
20140071022
Mobile terminal
A mobile terminal including a terminal body; a display configured to display information; and an antenna device mounted in the terminal body. Further, the antenna device includes a first conductive member including a shape such that the antenna device resonates at a first frequency band; a second conductive member diverging from the first conductive member, and extending by a prescribed length; and a ground member spaced apart from the second conductive member, and capacitive-coupled to the second conductive member, such that a frequency resonance added by the second conductive member is generated near a center frequency of the first frequency band..
03/13/14
20140070993
Signal tracking and antenna positioning system
Embodiments disclosed herein relate to a communication system. Particularly disclosed are systems and methods for locating and tracking radio frequency signals and for automatically positioning an antenna to receive a desired radio frequency signal.
03/06/14
20140065991
Matching network for transmission circuitry
The present disclosure relates to transmission circuitry of a wireless communication device. The transmission circuitry includes power amplifier circuitry, an output matching network, and impedance control circuitry.
03/06/14
20140064723
Cueing system for universal optical receiver
A universal optical receiver may include an optical channel monitor configured to acquire spectral data for an optical signal on at least one selected optical channel, a tunable local oscillator configured to be tuned to a center frequency of the optical signal on the at least one selected optical channel, a storage device configured to store data associated with the optical signal responsive to acquisition of the spectral data and tuning of the tunable local oscillator, and processing circuitry configured to execute an algorithm that employs a plurality of binary distinctions based on physical characteristics of the optical signal and employs at least one calculation of figure of merit associated with a series of parameter values of the optical signal to identify a format of the optical signal.. .
03/06/14
20140062604
System and method for a power amplifier
In accordance with an embodiment, a system includes a first amplifier and a first bandpass filter having an input coupled in series with an output of the first amplifier, and an output configured to be coupled to a load. The bandpass filter has a lower input impedance at an in-band center frequency than at out-of-band frequencies, and the first amplifier is configured to receive a pulse width modulated waveform filtered according to a first transfer function that attenuates sidebands of the pulse width modulated waveform..
02/27/14
20140055117
Digitally controlled spur management technique for integrated dc-dc converters
And frf is center frequency of a received channel. None of the harmonics of the clock frequency (fs+Δf) is present in a channel of interest.
02/20/14
20140050252
Apparatus and method for ultra wideband communication using dual band pass filter
An apparatus and method for ultra wideband (uwb) communication, using a dual band pass filter (bpf) is disclosed. The uwb communication apparatus may include a first bpf performing a first band pass filtering with respect to a uwb signal, a second bpf that has a center frequency differing from a center frequency of the first bpf, and performs a second band pass filtering with respect to the uwb signal, a first envelope detector that detects a size of a first signal filtered in the first bpf, a second envelope detector that detects a size of a second signal filtered in the second bpf, and a demodulator that demodulates a uwb signal, using the size of the first signal and the size of the second signal..
02/20/14
20140050124
Full duplex system with self-interference cancellation
An apparatus and method enable a full duplex system with self-interference cancellation. Receiving circuitry forming a signal receiving path is arranged for transferring communication signals received via air interface.
02/13/14
20140045514
Channelization method in whitespace band and apparatus for the same
A wireless communication system is disclosed. Specifically, a channelization method in a whitespace band and an apparatus for the same are disclosed.
01/30/14
20140029485
Simultaneous bidirectional transmission for radio systems
Disclosed are methods, systems, and apparatus for maximizing the spectral efficiency of a communications spectrum by providing a means to transmit information continuously in both directions of a radio link on the same center frequency at any given time. One embodiment may be directed to a method of communicating in a point-to-point radio system.
01/30/14
20140029482
Simultaneous bidirectional transmission for radio systems
Disclosed are methods, systems, and apparatus for maximizing the spectral efficiency of a communications spectrum by providing a means to transmit information continuously in both directions of a radio link on the same center frequency at any given time. One embodiment may be directed to a method of communicating in a point-to-point radio system.
01/30/14
20140028314
Method and apparatus for acquisition of magnetic resonance data while avoiding signal inhomogeneities
In a method and apparatus for the acquisition of magnetic resonance data while avoiding signal inhomogeneities, an excitation pulse is radiated into the examination subject, and following a first time period thereafter, a first refocusing pulse is radiated into the examination subject. After a second time period after the radiation of the first refocusing pulse, a series of at least two additional refocusing pulses is radiated that generate variable flip angles adapted to a predetermined signal curve and that are non-selective pulses.
01/23/14
20140025139
Receiver with dual band pass filters and demodulation circuitry for an external controller useable in an implantable medical device system
Receiver and demodulation circuitry for an external controller for an implantable medical device is disclosed. The circuitry comprises two high quality-factor band pass filters (bfps) connected in series.
01/09/14
20140011530
Wireless transmission device, power control method and program
A transmission power adjustment value acquisition unit references a transmission power/adjustment value table to output a transmission power adjustment value for transmission power. A transmission frequency correction value acquisition unit references a transmission frequency/correction value table to output a transmission power correction value, from a center frequency of the position of an rb that is sent from a used transmission frequency calculation unit and that will actually be used.
01/09/14
20140010332
Receiving device, receiving method, program, and receiving system
The present technology relates to a receiving device, a receiving method, a program, and a receiving system which may improve reception performance in the case of receiving a signal with a variable frequency band. A receiving device according to an embodiment of the present technology includes a demodulation unit configured to convert a received signal to a baseband signal in the case where a first frequency differs from a second frequency, wherein the first frequency is a center frequency in a band of the received signal, the second frequency is a center frequency in a band of a desired signal included in a part of the band of the received signal, and a dc component of the baseband signal is to be a frequency in the vicinity of the second frequency.
01/02/14
20140003547
Orthogonal signal demodulation
A modulation transmission technique comprises placing orthogonal subcarriers across an arbitrary-wide band of frequencies without a fixed pre-defined center frequency. Receivers demodulate only the sub-group of subcarriers in which they are to receive data.
01/02/14
20140002056
Systems and methods for measuring the frequency of signals generated by high frequency medical devices
Systems and corresponding methods for determining characteristics of an output signal generated by a high-frequency medical device using low-frequency measurement systems are disclosed. A digital measurement system includes an oscillator, a mixer, and a controller coupled to each other.
12/26/13
20130344837
Adjustable receive filter responsive to frequency spectrum information
An adjustable filter is responsive to a control signal to change a frequency response of the adjustable filter based on frequency spectrum information. The control signal may shift a center of the pass band from a first center frequency to a second center frequency and/or change a pass band bandwidth from a first bandwidth to a second bandwidth.
12/26/13
20130344836
Adjustable receive filter responsive to frequency spectrum information
An adjustable filter is responsive to a control signal to change a frequency response of the adjustable filter based on frequency spectrum information. The control signal may shift a center of the pass band from a first center frequency to a second center frequency and/or change a pass band bandwidth from a first bandwidth to a second bandwidth.
12/26/13
20130344829
Adjustable receive filter responsive to frequency spectrum information
An adjustable filter is responsive to a control signal to change a frequency response of the adjustable filter based on frequency spectrum information. The control signal may shift a center of the pass band from a first center frequency to a second center frequency and/or change a pass band bandwidth from a first bandwidth to a second bandwidth.
12/26/13
20130344826
Adjustable receive filter responsive to frequency spectrum information
An adjustable filter is responsive to a control signal to change a frequency response of the adjustable filter based on frequency spectrum information. The control signal may shift a center of the pass band from a first center frequency to a second center frequency and/or change a pass band bandwidth from a first bandwidth to a second bandwidth.
12/19/13
20130336239
Television high throughput communication
Systems and methods of performing communication via television high throughput (tvht) bandwidth channels are disclosed. Values of one or more physical layer parameters for use in communication via tvht parameters are also defined.
12/19/13
20130335163
Methods and apparatuses for implementing variable bandwidth rf tracking filters for reconfigurable multi-standard radios
A variable bandwidth filter comprises a first filter branch in parallel with a second filter branch. The first filter branch comprises a first resistance in series with an input and a first output, and n parallel paths across the first output, each path comprising a corresponding capacitor in series with a corresponding switch and a common terminal.
12/12/13
20130329773
Receiver and method of controlling a receiver
According to embodiments of the present invention, a receiver is provided. The receiver includes an envelope detector configured to generate a waveform corresponding to an envelope of a signal received by the receiver, a carrier recovery circuit configured to generate a carrier signal based on the waveform, wherein the carrier signal has a frequency corresponding to a center frequency of the received signal, and a template generator configured to generate a local template signal based on the waveform, the local template signal including a plurality of pulses.
12/05/13
20130322576
Accelerated carrier acquisition method for a digital communication receiver
A method of accelerated carrier signal acquisition for a digital communication receiver, the method comprising receiving a carrier signal by a receiver comprising a carrier recovery loop (crl), setting the crl to an open loop setting using a processor. Setting a numerically controlled oscillator (nco) within the crl at a center frequency of the nco, determining, by the processor, one or more initial parameters of the crl, calculating an estimate and polarity for a sign frequency detection frequency using a sign frequency detector while simultaneously estimating a fast fourier transform (fft) frequency by running an fft using the processor, comparing polarities of the estimates of the sign frequency detection frequency and fft frequency and determining a frequency offset using the processor, and adjusting one or more parameters of the crl based on the frequency offset using the processor..
12/05/13
20130321047
Distortion tolerant clock and data recovery
A system can include a phase detector configured to generate a phase error signal indicating a phase error of an input signal compared to an output signal and a first filter coupled to the phase detector and configured to generate a first control signal derived from the phase error signal. The system can include a pattern error detector configured to generate a pattern error signal specifying a pattern error of the input signal compared to the output signal and a second filter coupled to the pattern error detector and configured to generate a second control signal derived from the pattern error signal.
12/05/13
20130320215
Interconnection apparatus and method using terahertz waves
Disclosed herein is an interconnection apparatus and method using terahertz waves. The interconnection apparatus using terahertz waves according to the present invention includes a first terahertz wave generation unit for generating a first transmission terahertz wave, a center frequency of which is a first center frequency, using photomixing.
11/28/13
20130313837
Meta-material vibration energy harvester
A meta-material vibration energy harvester includes a housing element encapsulating a multiplicity of oscillators capable of harvesting a significant percentage of the total mechanical energy diffusely distributed throughout the vibrating structure, the harvester design resulting in a rapid transfer of mechanical energy entering it via the housing element from the element to the oscillators wherein the energy remains trapped while accumulating over an extended time, the percentage of energy transfer primarily depending on the ratios of the sum of the oscillator masses to the sum of the housing mass and of the measure of the mass of the vibrating structure and of the width of the band spanned by the oscillators to its center frequency, both the relevant measure of the vibrating structure mass and the values of the mass and frequency ratios that maximize the percentage of internal energy transfer depending on the harvesting scenerio.. .
11/14/13
20130304463
Noise cancellation method
An embodiment of the invention provides a noise cancellation method for an electronic device. The method comprises: receiving an audio signal; applying a fast fourier transform operation on the audio signal to generate a sound spectrum; acquiring a first spectrum corresponding to a noise and a second spectrum corresponding to a human voice signal from the sound spectrum; estimating a center frequency according to the first spectrum and the second spectrum; and applying a high pass filtering operation to the sound spectrum according to the center frequency..
11/14/13
20130299693
Tandem mass spectrometry using composite waveforms
A tandem mass spectrometer system and method are described, where a composite voltage waveform is applied to so as to trap ion having selected m/z. The trapped ions may be subject to collision induced ionization dissociation (cid) by a selectable discrete frequency voltage waveform positioned so as to be in a notch in a broadband waveform.
10/31/13
20130285714
Tuner
A center frequency f0 of an if filter is effectively adjusted. The if filter filters a down-converted signal centering around the center frequency f0.


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Center Frequency topics: Center Frequency, Frequency Band, Magnetic Field, Electrostatic Discharge, Amplifier Device, Data Packet, Processing Device, Signal Processing, Reproduction, Computer Program, Communication System, Modulation, Channel Op, Extensions, Transducer

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