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Pilot Signal patents

      

This page is updated frequently with new Pilot Signal-related patent applications.




 Improved carrier frequency offset estimation using precoded non-fixed pilot signals patent thumbnailnew patent Improved carrier frequency offset estimation using precoded non-fixed pilot signals
In an embodiment a method in an access point of a wireless is disclosed. The wireless network comprises the access point and a plurality of terminals.
Kabushiki Kaisha Toshiba


 System and  pilot signal transmission patent thumbnailnew patent System and pilot signal transmission
Longer pilot sequences can be supported by transmitting pilot values of a given pilot sequence over different orthogonal frequency division multiplexed (ofdm) symbols of an uplink frame. The pilot values may be contiguous, or non-contiguous, with one another in the time domain.
Huawei Technologies Co., Ltd.


 Pilot time slot allocation for a mimo system patent thumbnailPilot time slot allocation for a mimo system
A cellular multiple-input and multiple-output, mimo, system (10) comprises a base station (20) having a plurality of antennas (22) and a logic (21) which analyzes pilot signals received from a terminal (11-15) at the plurality of antennas (22) to obtain information about radio channel properties between the terminal (11-15; 100) and the plurality of antennas (22). The base station (20) assigns at least two terminals (11-13) of a plurality of terminals (11-15) to a same pilot time slot.
Sony Corporation


 Monitoring  optical signal to noise ratio, signal transmission apparatus and receiver patent thumbnailMonitoring optical signal to noise ratio, signal transmission apparatus and receiver
Embodiments of the present disclosure provide a monitoring apparatus for an optical signal to noise ratio, a signal transmission apparatus and a receiver. White noise power of received signals is calculated according to noise power and power of pilot signals of the received signals in different polarization states, and influence of a nonlinear noise is excluded, thereby accurately estimating an optical signal to noise ratio, for example, with a calculation process being simple and an application range being relatively wide..
Fujitsu Limited


 Method, base station and terminal for determining channel properties in a cellular multiple-input and multiple-output system patent thumbnailMethod, base station and terminal for determining channel properties in a cellular multiple-input and multiple-output system
A cellular multiple-input and multiple-output, mimo, system comprises a base station having a plurality of antennas. Pilot signals are received by the base station in each frame of a sequence of frames (60).
Sony Corporation


 Method, apparatus, and device for modulating orthogonal frequency division multiplexing optical signal patent thumbnailMethod, apparatus, and device for modulating orthogonal frequency division multiplexing optical signal
A method, an apparatus, and a device for modulating an orthogonal frequency division multiplexing optical signal are provided and relate to the field of optical communications technologies. The method includes: performing bit-to-symbol mapping and serial-to-parallel conversion on a baseband signal to obtain at least two sub symbol sequences of the baseband signal; determining, from all subcarriers of an ofdm signal, a subcarrier used for loading a pilot signal; updating, according to information of the pilot signal, content corresponding to the subcarrier used for loading the pilot signal; and performing inverse discrete fourier transform, parallel-to-serial conversion, digital-to-analog conversion, and electrical amplification processing on content currently corresponding to all the subcarriers of the ofdm signal, and modulating a light wave by using processed data and a bias electrical signal, to form an ofdm optical signal loaded with the pilot signal..
Huawei Technologies Co., Ltd.


 Channel information feedback method and pilot and beam transmission method, system and device patent thumbnailChannel information feedback method and pilot and beam transmission method, system and device
Disclosed are a channel information feedback method, pilot and beam transmission methods, systems and devices. The channel information feedback method includes that: a base station transmits m types of pilot signals, the m types of pilot signals corresponding to m pilot ports respectively; the base station configures n pilot ports in the m pilot ports for a terminal through signalling, m being a positive integer and n being a positive integer smaller than m; and the terminal receives and detects the pilot signals from the n pilot ports, selects k pilot ports from the n pilot ports according to received signal quality, and feeds back channel information of channels formed by the k pilot ports and the terminal, k being a positive integer smaller than n..
Zte Corporation


 Systems and methods for frequency drift compensation for radio receivers patent thumbnailSystems and methods for frequency drift compensation for radio receivers
A frequency drift compensation system for a radio receiver includes a pilot signal generator that is configured to generate two pilot signals, a local oscillator that is configured to generate a local oscillator frequency signal, a first mixer that generates a first offset pilot signal, a second mixer that generates a second offset pilot signal, and a summer that is configured to add the first offset pilot signal and the second offset pilot signal to the intermediate frequency signal to obtain a composite signal. The frequency drift compensation system includes a processor that is configured to detect frequency drift in the offset pilot signal responsive to the composite signal and to generate a frequency drift control signal to compensate for the frequency drift.

 Channel estimation in wireless communication network node patent thumbnailChannel estimation in wireless communication network node
Radio network node and method therein, for channel estimation of a channel used for wireless signal communication with a ue. The radio network node comprises a multiple antenna array configured for beamforming, spatial multiplexing and mimo transmission.
Huawei Technologies Co., Ltd.


 Terminal station apparatus, base station apparatus, transmission method and control method patent thumbnailTerminal station apparatus, base station apparatus, transmission method and control method
A terminal apparatus is disclosed wherein even in a case of applying su-mimo and mu-mimo at the same time, the inter-sequence interference in a plurality of pilot signals used by the same terminal can be suppressed to a low value, while the inter-sequence interference in pilot signal between terminals can be reduced. In this terminal apparatus: a pilot information deciding unit decides, based on allocation control information, walsh sequences of the respective ones of first and second stream groups at least one of which includes a plurality of streams; and a pilot signal generating unit forms a transport signal by using the decided walsh sequences to spread the streams included in the first and second stream groups.
Sun Patent Trust


Aggregation frame design method and apparatus

Embodiments of the present application provide an aggregation frame design method and apparatus, the method includes: selecting, by a transmit end from n different hash function groups, one group that has a same sequence number as that of each receive end, mapping a mac address of each receive end into a number x, and denoting the number x; obtaining m first sequences of each receive end, and performing a bitwise or operation on the m first sequences to obtain an identification sequence of each receive end; obtaining n identification sequences of n receive ends, performing a bitwise or operation on the n identification sequences to obtain a bloom sequence, and encoding and modulating the bloom sequence to map the bloom sequence onto an ofdm symbol; and forming an aggregation frame by using a pilot signal, the ofdm symbol, the n identification sequences, and data of the n receive ends.. .
Huawei Technologies Co., Ltd.

Non-linear precoder with separate tracking

A network unit includes a non-linear precoder for jointly pre-processing transmit samples to be transmitted over respective communication channels for crosstalk mitigation. The non-linear precoder includes a first non-linear precoding stage configured to operate according to a first triangular precoding matrix and including a modulo function, followed by a second linear precoding stage configured to operate according to a second precoding matrix.
Alcatel Lucent

Methods to improve single radio long term evolution (srlte) performance

Various embodiments provide methods, devices, and non-transitory processor-readable storage media for reducing subscription reacquisition times in single radio long term evolution (srlte) communication devices. In various embodiments, a processor of the srlte communication device may calculate an expected pilot slew error in response to a radio frequency (rf) resource of the srlte communication device becoming available to a first subscription following a declared system loss of the first subscription.
Qualcomm Incorporated

Channel equalization apparatus and method based on pilot signals for docsis down stream system

An apparatus and a method of channel estimation and equalization based on pilot signals, which acquire a channel estimation vector and effectively perform channel equalization by using scattered pilots and continuous pilots in a communication system to which an ofdm symbol is applied, such as a docsis 3.1 down stream phy system using multiple carriers.. .
Electronics And Telecommunications Research Institute

Power supply apparatus and power supply control method

A power supply apparatus includes: a power supply circuit, including a switch configured to perform switching at a frequency, configured to generate an output voltage to be supplied to a load device; a phase compensator configured to perform feedback control of switching duty of the switch in accordance with the output voltage, and change a response characteristic of the output voltage to a load fluctuation of the load device in accordance with a reference voltage and the output voltage; and a controller configured to apply a pilot signal over a frequency range to the reference voltage, monitor the output voltage, and control the response characteristic in accordance with the pilot signal and the output voltage.. .
Fujitsu Limited

Device, network, and wideband lte single ofdm symbol uplink transmission

An embodiment method for managing uplink transmission includes dividing, by a network controller, frequency resources in a single ofdm symbol into two sets of frequency resources. The method further includes signaling, by the network controller, to a ue to transmit data in a first set of the frequency resources and to transmit a pilot signal in a second set of the frequency resources..
Futurewei Technologies, Inc.

Location-based services provided via unmanned aerial vehicles (uavs)

An automated method of determining a location of an aerial platform is described. The method includes: transmitting, from the aerial platform, a first pilot signal; receiving, at a set of ground devices, the first pilot signal; determining a first set of values based on measurements associated with the first pilot signal; and calculating a position of the aerial platform based at least partly on the first set of values.

Method and sending and receiving signal

Embodiments of the present invention provide a method and apparatus for sending and receiving a signal, and relate to the field of wireless communication, where a quantity of pilots does not increase with increasing paired data streams of an mu-mimo system, and overheads of the pilots are fixed. The method includes: determining, by a transmitter, a transmitting precoding vector of a primary pilot signal of a first receiver and an estimated receiving filtering vector; determining a transmitting precoding vector of a secondary pilot signal of the first receiver; determining a to-be-sent primary pilot signal, to-be-sent user data of the first receiver, and a to-be-sent secondary pilot signal; and sending the first receiver the to-be-sent primary pilot signal, the to-be-sent user data of the first receiver, and the to-be-sent secondary pilot signal..
Huawei Technologies Co.,ltd.

Methods and mitigating known interference

Systems and methods for mitigating known interference at a receiving device are provided. A signal from a transmission source is received by a receiving device that is affected by an interference source.
Marvell World Trade Ltd.

Pilot sequences in data streams

A method, an apparatus, and a computer-readable medium for wireless communication are provided. In one aspect, an apparatus is configured to determine a plurality of resource units for communication.
Qualcomm Incorporated

Optical transmitter and controlling optical modulator

An optical transmitter has an optical modulator with a mach-zehnder interferometer, a pilot signal generator configured to generate a pilot signal to be superimposed on a drive signal for driving the optical modulator or on a substrate bias voltage applied to the optical modulator, and a controller configured to detect a ratio between a pilot component and a direct current component contained in a light output from the optical modulator and control at least one of an amplitude of the drive signal and a level of the substrate bias voltage such that the ratio becomes a constant value.. .
Fujitsu Optical Components Limited

Method for controlling modulation depth of pilot signal, transmitter, and pilot locking apparatus

A transmitter includes a pilot loading apparatus, an optical modulator, and a pilot locking apparatus. The pilot locking apparatus is configured to determine a pilot operating point that is currently on a response curve and that is of the optical modulator, and a target initial amplitude of an electrical pilot signal.
Huawei Technologies Co., Ltd.

Method and performing feedback for massive antenna array based beamforming in wireless communication system

A method for transmitting feedback information to a base station at a user equipment (ue) in a wireless communication system is disclosed. The method includes receiving a pilot signal from the base station at a first time and a second time, measuring first channel quality at the first time and second channel quality at the second time based on the pilot signal and transmitting the feedback information including information about a variation value between the first channel quality and the second channel quality to the base station..
Lg Electronics Inc.

System and in band full duplex communication in radio network

The embodiments herein provide a method for in band full duplex (ibfd) communication in a radio network including at least one ibfd node, at least one first non-ibfd user equipment (ue) and at least one second non-ibfd ue. The method includes transmitting by the at least one ibfd node a first signal to the at least one first non-ibfd ue over a forward channel, and receiving by the at least one ibfd node a second signal from the at least one second non-ibfd ue over the same forward channel simultaneously, where the second signal includes at least one of a pilot signal, channel state information (csi), and control information, where the forward channel is orthogonal to a reverse channel in at least one of time, frequency, space, and code..
Indian Institute Of Technology Madras

Apparatus and sending and receiving broadcast signals

An apparatus for transmitting a broadcast signal includes an input formatting module configured to de-multiplex an input stream into at least one data pipe (dp); a bicm module configured to perform error correction processing on data of the at least one dp; a signal frame building module configured to map the data of the dp to symbols within a signal frame; and an ofdm generation module configured to generate a transmission broadcast signal by inserting a preamble into the signal frame and performing ofdm modulation. The ofdm generation module includes a pilot signal insertion module configured to insert a pilot signal including continual pilots (cp) and scattered pilots (sp) into the transmission broadcast signal, and the cps are inserted into every symbol of the signal frame, and location and number of the cps are determined based on a fast fourier transform (fft) size..
Lg Electronics Inc.

Apparatus, method, and computer program for communicating one or more symbols with multiple pilot signals and nulls

An apparatus, method, and computer program product are provided for communicating one or more symbols with multiple pilot signals and nulls. In use, one or more symbols are communicated including a plurality of pilot signals and a plurality of nulls, for use in generating a plurality of coefficients..
Futurewei Technologies, Inc.

Standardized inter-base station reporting of pilot contamination for improved pilot resource re-use

The invention is directed to systems, methods and computer program products for standardized inter-base station reporting of pilot contamination for improved pilot resource re-use. Specifically, possible pilot channel contamination is detected at first user equipment and, in response to the detection, a request is transmitted for the first user equipment to forego transmission during a next frame designated for transmitting a pilot signal.
Sony Corporation

Subscriber-controlled registration technique in a cdma system

A method and apparatus for dynamic uplink communication in a wireless communication system are disclosed herein. The method includes receiving, by the mobile station, a first channel from a first base station, wherein the first channel includes an indication, wherein the indication has one of two states, wherein the base station transmits on forward link channels including a pilot channel, traffic channels and the first channel.
Ipr Licensing, Inc.

Method and system for mapping pilot signals in multi-stream transmissions

A base station comprises a downlink transmit path comprising circuitry configured to transmit a plurality of reference signals in two or more subframes. Each subframe comprises one or more resource blocks.
Samsung Electronics Co., Ltd.

Pilot signal sending and receiving method and apparatus

Embodiments of this application disclose a pilot signal sending and receiving method and apparatus, wherein the pilot signal sending method includes: establishing a first correspondence between a carrier identifier and a pilot pattern of a first type of pilot signal; establishing a second correspondence between a carrier identifier and a resource block set; acquiring a target carrier identifier of a target carrier; determining a location of a target resource block set corresponding to the target carrier identifier; determining a target pilot pattern that is of a first type of pilot signal and that corresponds to the target carrier identifier; mapping, according to the target pilot pattern, the first type of pilot signal to each resource block in the target resource block set on the target carrier. In this method, mapping is performed on a pilot signal only in a resource block set, which may reduce pilot redundancy and overheads..
Huawei Technologies Co., Ltd.

Control system for construction machinery and control construction machinery using the same

A control system for construction machinery includes first and second hydraulic pumps connected to an engine, a swing control valve and a first boom control valve installed in a first center bypass line connected to the first hydraulic pump, a second boom control valve installed in a second center bypass line connected to the second hydraulic pump, a shutoff valve installed in a control line through which a boom raising pilot signal pressure is supplied to the first boom control valve and configured to selectively open and close the control line, and a control unit configured to electronically control the shutoff valve according to a manipulation signal, wherein the control unit closes the shutoff valve such that the first boom control valve is shifted to a neutral position when a swing operation priority mode is selected.. .
Doosan Infracore Co., Ltd.

Method and target cell throughput prediction prior to handover of a user equipment

In one example embodiment, a user equipment is currently being served over a first component carrier. The user equipment includes a processor configured to predict a quality of a pilot signal associated with a second component carrier, the second component carrier being a potential component carrier for a handover of the user equipment, and predict a data throughput based on the predicted quality of the pilot signal, the predicted data throughput being indicative of data throughput experienced by the user equipment after the handover of the user equipment to the second component carrier..
Alcatel Lucent Usa, Inc.

Methods and apparatuses for advanced receiver design

Disclosed are embodiments of apparatuses and methods of use thereof for frequency domain (fd) chip level (cl) equalizers used in wireless receivers. The fd-cl-eq may further selectively apply a higher order matrix inverse or a lower order matrix inverse in the calculation of a channel estimate based on whether interference is present or not.
Interdigital Technology Corporation

D2d communication method and d2d communication apparatus

Device to device (d2d) communication is provided. A method comprises: acquiring information associated with a pilot channel resource used to send at least one directional pilot signal associated with directional d2d communication; and transmitting a data signal associated with the directional d2d communication at least according to a received state of the pilot signal on the pilot channel resource.
Beijing Zhigu Rui Tuo Tech Co., Ltd

D2d communication control method and control apparatus

Device to device (d2d) communication control is provided. A method comprises: determining a pilot channel resource used to send at least one directional pilot signal associated with directional d2d communication; and determining a transmit control strategy associated with the directional d2d communication at least according to a received state of the pilot signal on the determined pilot channel resource.
Beijing Zhigu Rui Tuo Tech Co., Ltd

D2d communication control method and control apparatus

Device to device (d2d) communication control is provided. A method comprises: allocating a pilot channel resource for at least one directional pilot signal associated with directional d2d communication; and sending information associated with the pilot channel resource.
Beijing Zhigu Rui Tuo Tech Co., Ltd

Pilot reconfiguration and retransmission in wireless networks

Adaptive signaling (e.g., pilot signaling, control signaling, or data signaling) is disclosed in which resources allocated to one or more symbols are allowed to vary to more closely match channel conditions and data latency requirements. In one embodiment, a method includes determining that low-latency data is available to transmit during a first transmission time interval (tti) and informing a mobile station that the low-latency data will be transmitted during one slot reserved for a symbol in the first tti.
Qualcomm Incorporated

Technique for assigning pilot signals to user equipments

A technique for assigning pilot signals to user equipments is described. The user equipments access a radio base station that provides radio access.
Telefonaktiebolaget L M Ericsson (publ)

Interference measuring method and interference measuring apparatus

Interference measurement is provided. A method comprises: determining pilot channel resource configured to send at least one directional pilot signal associated with directional device-to-device communications, and determining, at least according to a received state of a pilot signal on the determined pilot channel resource, interference caused by a signal associated with directional device-to-device communications in the pilot channel resource.
Beijing Zhigu Rui Tuo Tech Co., Ltd

Scaled symbols for a self-contained time division duplex (tdd) subframe structure

In an aspect of the disclosure, a method, a computer program product, and an apparatus are provided. The method may be performed by a scheduling entity.
Qualcomm Incorporated

Uplink access method, apparatus, and system

The present application provide a method for a terminal device to transmit uplink service data to a base station. The terminal device obtains uplink service data from a user input in a service session.
Huawei Technologies Co.,ltd.

Pilot signal transmission method and apparatus

Embodiments of the present invention disclose a pilot signal transmission method and apparatus, which relate to the communications system field, and can enlarge an uplink coverage range. The method includes: first, determining a prb pair of which a quantity of subcarriers is less than 12, then, adding pilot signals to the prb pair, and finally, sending the pilot signals carried in the prb pair; or first, determining, from an uplink subframe and a special subframe that are of a tdd radio frame, a subframe for carrying a pilot signal, then, adding a pilot signal to the subframe for carrying a pilot signal, and adding a pusch to a special subframe of the tdd radio frame.
Huawei Technologies Co., Ltd.

Electric vehicle externally chargeable by two different methods

This vehicle includes an inlet for performing external charging of a first method as well as a charging cord and a relay for performing external charging of a second method. During external charging of the first method, a battery charger is controlled such that electric current having a value smaller than or equal to a current value indicated by a pilot signal flows.
Toyota Jidosha Kabushiki Kaisha

Channel impulse response estimation for full-duplex communication networks

A network-wide interference cancellation scheme estimates channel impulse responses related to self interference and the mutual interference, then reduces both the self interference and the mutual interference in the receiver of an full duplex device. Full duplex gains may be capitalized upon and translated into system gain.

Method for acquiring channel state information in fdd mimo wireless networks

This invention presents methods and circuits for a bs to acquire dl csi in a fdd wireless network comprising switching the normal transmitting and receiving frequencies in a first and a second fdd apparatus, and using ul pilot signals to estimate the dl csi based on reciprocity of the over the air channels.. .
Rf Dsp Inc.

Method for transmitting pilot signal, base station, and user equipment

The present invention provides a method for transmitting a pilot signal, a base station, and user equipment the method including: determining, by a base station, a transmission period of a pilot antenna port group; and sending, by the base station, in a transmission period corresponding to each pilot antenna port group, a pilot signal to user equipment by using a resource corresponding to the pilot antenna port group, so that the user equipment measures channel quality according to the pilot signal. By means of the technical solutions provided in the embodiments of the present invention, pilot signal overheads can be reduced..
Huawei Technologies Co., Ltd.

Signal processing apparatus, signal transmitting apparatus and receiver

Embodiments of the present disclosure provide a signal processing apparatus, a signal transmitting apparatus and a receiver, which are adapted for a frequency division multiplexing system having a high-order modulation format. A receiver having a high-magnification sampling rate by inserting a pilot signal between neighboring subcarriers at a transmitter side, calculating a laser phase noise according to a phase of the pilot signal at a receiver side, and performing down-sampling and equalization processing after performing carrier phase recovery according to the laser phase noise, so that a laser phase noise having a wide frequency may be accurately compensated, thereby having a relatively powerful carrier phase recovery ability..
Fujitsu Limited

Probe generator, optical transmission apparatus and probe generating method

A probe generator includes: a first demultiplexer configured to branch a first optical signal having a first wavelength into at least two first polarized optical signals; a first adjustor configured to adjust the first polarized optical signals such that the first polarized optical signals have the same polarization direction and to combine the adjusted first polarized optical signals into a second optical signal; a first modulator configured to branch the second optical signal into at least two first split optical signals and to intensity-modulate each of the first split optical signals with first pilot signals; a second adjustor configured to adjust the first split optical signals intensity-modulated by the first modulator such that the intensity-modulated first split optical signals have different polarization directions; and an output unit configured to combine the first split optical signals adjusted by the second adjustor to generate a probe optical signal to be output.. .
Fujitsu Limited

Method for acquiring channel information, apparatus, and system

Embodiments of the present disclosure provide a method for acquiring channel information, an apparatus, and a system, relate to the communications field, and can reduce overhead of pilot signals in a process of acquiring channel state information. In various embodiments, a base station selects first preset antennas from an antenna array, maps the first preset antennas to pilot signals, and sends the pilot signals and antenna configuration information to a terminal, and the terminal obtains channel state information of second preset antennas by means of calculation according to the pilot signals and the antenna configuration information.
Huawei Technologies Co., Ltd.

Signal generating method and signal generating apparatus

A transmission method for simultaneously transmitting a first modulated signal and a second modulated signal at the same frequency includes performing precoding on both signals using a fixed precoding matrix and regularly changing the phase of at least one of the signals. In this method, the power ratio between a plurality of signals transmitted from a plurality of antennas at the same frequency and at the same time differs from the power ratio between a plurality of pilot signals transmitted from the plurality of antennas at the same frequency and at the same time, whereby the accuracy of channel estimation by a reception device is improved..
Sun Patent Trust

Terminal station apparatus, base station apparatus, transmission method and control method

A terminal apparatus is disclosed wherein even in a case of applying su-mimo and mu-mimo at the same time, the inter-sequence interference in a plurality of pilot signals used by the same terminal can be suppressed to a low value, while the inter-sequence interference in pilot signal between terminals can be reduced. In this terminal apparatus: a pilot information deciding unit decides, based on allocation control information, walsh sequences of the respective ones of first and second stream groups at least one of which includes a plurality of streams; and a pilot signal generating unit forms a transport signal by using the decided walsh sequences to spread the streams included in the first and second stream groups.
Sun Patent Trust



Pilot Signal topics:
  • Pilot Signal
  • Base Station
  • Channel Estimation
  • Communication System
  • Communications
  • Mobile Terminal
  • Multiple Input Multiple Output
  • Carrier Frequency
  • Antenna Elements
  • Cellular Communication
  • Spatial Streams
  • Phase Shift
  • Distributed Antenna System
  • Distributed
  • Scheduling


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    This listing is a sample listing of patent applications related to Pilot Signal for is only meant as a recent sample of applications filed, not a comprehensive history. There may be associated servicemarks and trademarks related to these patents. Please check with patent attorney if you need further assistance or plan to use for business purposes. This patent data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Pilot Signal with additional patents listed. Browse our RSS directory or Search for other possible listings.


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