Plural Signal Paths In Receiver Patents (Class 375/349)
  • Patent number: 11637614
    Abstract: Some embodiments are directed to a method of transmission from at least one transmit antenna to all or some of n reception antennas including at least one transmission step suitable for transmitting a first binary information item by using the absence of focusing from the transmit antenna to any one of the n reception antennas, during a predetermined integer number k of symbol times and/or a modulation of the power transmitted by at least one transmit antenna, participating in a coding of a second binary information item. Some other embodiments are directed to a receiver-decoder suitable for reception according to the method.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: April 25, 2023
    Assignee: INSTITUT NATIONAL DES SCIENCES APPLIQUÉES DE RENNES (INSA de RENNES)
    Inventors: Ali Mokh, Maryline Helard, Yvan Kokar, Matthieu Crussiere, Jean-Christophe Prevotet
  • Patent number: 11552660
    Abstract: A wireless communication control method suppresses interference using an MMSE weight in an environment of wireless communication where the number of transmission stations transmitting a signal to a receiving station is larger than the number of reception antennas of the receiving station. The receiving station calculates power of an interference signal included in a signal received by the receiving station from the transmission stations the number of which is larger than the number of reception antennas, the interference signal corresponding to a part by which the number of transmission stations exceeds the number of reception antennas. The receiving station calculates the MMSE weight depending on the power of the interference signal, recalculates the power of the interference signal using the MMSE weight, and recalculates the MMSE weight depending on the recalculated power of the interference signal.
    Type: Grant
    Filed: October 7, 2021
    Date of Patent: January 10, 2023
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kenichi Takizawa, Masafumi Moriyama, Fumihide Kojima, Atsushi Kurosawa
  • Patent number: 11431434
    Abstract: A security signal transmission method performed by a first communication node includes estimating a radio channel between the first communication node and a second communication node; classifying all subcarriers into a first subcarrier group for transmitting a data signal and a second subcarrier group for transmitting a jamming signal based on estimated channel information; generating data symbol(s) by allocating the data signal to subcarriers of the first subcarrier group; generating jamming symbol(s) by allocating the jamming signal to subcarriers of the second subcarrier group; generating a first control symbol to which a first control signal is mapped, the first control signal including a first reference value used to restore the data symbols at the second communication node; and transmitting the data symbol(s), the jamming symbol(s), and the first control symbol to the second communication node.
    Type: Grant
    Filed: November 19, 2020
    Date of Patent: August 30, 2022
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventor: Hyung Sik Ju
  • Patent number: 11405080
    Abstract: According to an embodiment of the disclosure, a base station communicating by using a plurality of antennas includes: a memory; a transceiver including the plurality of antennas forming an array structure; and at least one processor configured to convert first in-phase quadrature (IQ) data included in a first digital signal into radio frequency (RF) signals and then apply the RF signals to the plurality of antennas, respectively, detect a back-lobe signal beam-formed by the plurality of antennas, and perform linearization on second IQ data included in a second digital signal, based on the detected back-lobe signal.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: August 2, 2022
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jinsung Kim
  • Patent number: 11394390
    Abstract: A wide-band analog input signal is converted into a digital output signal on the basis of a band division method without the need for filter circuits. An analog processing block Aj (j=2 to N, where N is an integer) down-converts an analog input signal Sx using a cutoff frequency fj-1 of a channel CHj-1 and A/D-converts an analog signal Saj acquired as a result. A digital processing block Bj doubles the signal strength of a first digital signal S1j acquired by Aj, subtracts a third digital signal S3j-1 of the channel CHj-1 from a second digital signal S2j acquired as a result, up-converts the acquired third digital signal S3j using the cutoff frequency fj-1, and outputs the result to an adder as a channel output signal Syj of a corresponding channel CHj.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: July 19, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Teruo Jo, Hiroshi Yamazaki, Munehiko Nagatani, Hiroshi Hamada, Hideyuki Nosaka
  • Patent number: 11342948
    Abstract: A mixer for mixing a radio frequency signal is described. The mixer includes a local oscillator input, a phase adjustment module, and at least one mixing channel. The local oscillator input is configured to receive a local oscillator signal. The phase adjustment module is configured to control a phase of the local oscillator signal in order to add a desired amount of delay to the local oscillator signal, thereby generating at least one adapted oscillator signal. The at least one adapted oscillator signal has a desired phase difference compared to the local oscillator signal. The at least one mixing channel includes at least one mixer unit having at least one signal input. The at least one mixing channel is configured to receive the at least one adapted oscillator signal. The at least one mixing channel further is configured to forward the adapted oscillator signal to the mixer unit. The at least one signal input is configured to receive an input signal.
    Type: Grant
    Filed: December 3, 2020
    Date of Patent: May 24, 2022
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventor: Oliver Landolt
  • Patent number: 11317417
    Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for switching between transmission technologies within a spectrum based on network load are described. In one aspect, a method includes obtaining first network load information that indicates network load for a first access point operating using listen before talk (LBT) and second network load information for a second access point using LBT, determining if at least one of the first network load information or the second network load information satisfies a network load threshold, and in response to determining that that the network load information satisfies the network load threshold, providing an instruction to the first access point to operate using frequency domain multiplexing.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: April 26, 2022
    Assignee: Google LLC
    Inventor: Jibing Wang
  • Patent number: 11316576
    Abstract: A wireless communication system and a precoder device for use in such system. The precoder device includes a delay element arranged to introduce a delay to a plurality of sub-channels of a signal at a transmitter end of the communication system; wherein the delay in a plurality of sub-channels are associated with a process time of a receiver component at a receiver end of the communication system.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: April 26, 2022
    Assignee: City University of Hong Kong
    Inventors: Chi Wah Kok, Wing Shan Tam, Wai Ming Chan, Hing Cheung So
  • Patent number: 11290212
    Abstract: Methods, apparatuses, and systems for calculating time delays by a Wasserstein approach are provided. A plurality of signals are recorded by a plurality of sensors (three or more), respectively, and received at a controller. The plurality of signals recorded by the plurality of sensors are generated in response to a signal emitted by a source. The plurality of signals are converted into a plurality of probability density functions. A cumulative distribution transform for each of the plurality of probability density functions is calculated. A time delay for each unique pair of the plurality of sensors is calculated by minimizing a Wasserstein distance between two cumulative distribution transforms corresponding to the unique pair of the plurality of sensors.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: March 29, 2022
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Meredith N. Hutchinson, Jonathan M. Nichols, Gustavo K. Rohde, Nicole Menkart, Geoffrey A. Cranch
  • Patent number: 11277194
    Abstract: An operation method of a first node belonging to an Xhaul network in a wireless backhaul system including the Xhaul network may comprise transmitting first resource allocation information to a second node and third nodes; receiving, from the second node, information of cross polarization interferences (XPIs) measured for wireless signals through wireless links generated based on the first resource allocation information; generating second resource allocation information indicating resources allocated to each of the second node and the third nodes based on the information of the XPIs; and transmitting the second resource allocation information to the second node and the third nodes, wherein the XPIs for the wireless signals are measured by the third nodes.
    Type: Grant
    Filed: September 1, 2020
    Date of Patent: March 15, 2022
    Assignee: Electronics and Telecommunications Research Institute
    Inventor: Kyung Yeol Sohn
  • Patent number: 11217285
    Abstract: A memory subsystem and method for performing calibrations therein is disclosed. A memory subsystem includes a memory controller coupled to a memory by a plurality of signal paths. The memory controller is configured to perform an initial calibration to determine respective eye patterns corresponding to the ones of the plurality of signal paths. For a subsequent calibrations, updated eye patterns are determined for a subset of the plurality of signal paths. Remaining ones of the plurality of signal paths (not included in the subset), are not active during the subsequent calibrations. Updated eye patterns for the remaining ones of the plurality of signal paths are determined based on information obtained during the initial calibration and information from signal paths in the subset designated proxies for the remaining ones of the plurality of signal paths.
    Type: Grant
    Filed: August 5, 2020
    Date of Patent: January 4, 2022
    Assignee: Apple Inc.
    Inventors: Robert E. Jeter, Rakesh L. Notani, Kai Lun Hsiung, Venkata Ramana Malladi, Rahul Ranjan, Naveen Kumar Korada
  • Patent number: 11196868
    Abstract: A server, system, and client are provided. The server receives audio data from one or more clients; receives an audio data request from a requesting client, and obtains, from the audio data request, a mixing manner of audio data requested by the requesting client; preprocesses audio data of a client of the one or more clients that corresponds to the audio data request using the obtained mixing manner; and sends the preprocessed audio data to the requesting client.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: December 7, 2021
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Xin Liang Wang, Bin Li, Jing Cong Chen
  • Patent number: 11038573
    Abstract: A distributed beamforming system including a platform terminal and a plurality of user terminals is disclosed. An individual user terminal includes a receiver configured to receive a plurality of individual wireless signals, where the plurality of individual wireless signals are transmitted by the platform terminal and are orthogonal with respect to one another. The individual user terminal also includes one or more frequency converters configured to transform each of the plurality of individual wireless signals to an intermediate frequency. The individual user terminal is configured to coherently combine the plurality of individual wireless signals together to form a beamformed signal.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: June 15, 2021
    Assignee: The Boeing Company
    Inventors: Christopher Jason Foster, Daniel Roukos, Kyle William Jewett, Christ Tzelepis
  • Patent number: 10998885
    Abstract: The present invention provides a method for equivalent high sampling rate FIR filtering based on FPGA, first, the coefficients h(k) of FIR filter are found by using MATLAB, multiplied by an integer and then rounded for the purpose that the rounded coefficients h(k) can be directly used into a FPGA, then the ADC's output of high data rate fs is lowered by dividing the ADC's output x(n) into M parallel data streams xi(n) of low data rate, and the M×L samples in one clock cycle is obtained by delaying the M parallel data streams xi(n) simultaneously by 1, 2, . . . , L? periods of the synchronous clock, at last, the samples yi(n) of FIR filtering output is calculated according to the samples selected from the M×L samples, and the filtered data y(n) of data rate fs is obtained by putting the samples yi(n) together in ascending order of i. Thus, the continuous FIR filtering of an ADC's output sampled with high sampling rate is realized, while the data rates before and after the FIR filtering are unchanged.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: May 4, 2021
    Assignee: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA
    Inventors: Lianping Guo, Hao Zeng, Feng Tan, Duyu Qiu, Xianggong Guo, Yu Li
  • Patent number: 10979131
    Abstract: A relay including a first transmitter that converts a first digital transmit signal to a first analog transmit signal, a first receiver that converts a first analog receive signal to a first digital receive signal, a second transmitter that converts a second digital transmit signal to a second analog transmit signal, a second receiver that converts a second analog receive signal to a second digital receive signal, and a self-interference canceller that generates a first self-interference cancellation signal based on at least one of the first digital transmit signal and the first analog transmit signal, and combines the first self-interference cancellation signal with at least one of the first digital receive signal and the first analog receive signal.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: April 13, 2021
    Assignee: Kumu Networks, Inc.
    Inventors: Steven Hong, Jeffrey Mehlman, Joel Brand, Jung-Il Choi, Mayank Jain
  • Patent number: 10862557
    Abstract: Embodiments of the present invention relate to the communications field, and provide a data transmission method, a sending device, and a receiving device. Transmission requirements of different subbands can be maximally satisfied, and a system throughput can be improved. The method includes: determining, by a sending device, rank indicators of J (an integer greater than or equal to 1) subbands corresponding to a to-be-transmitted channel, where the rank indicators of the J subbands are not totally the same; determining, by the sending device based on a rank indicator of each of the J subbands, a transmission block size.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: December 8, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Jianqin Liu
  • Patent number: 10846582
    Abstract: A RFID tag (1) for communicating with an external reader comprises: two antenna connections (LA, LB) for connecting the RFID tag (1) to an antenna (10), an active receiver switch circuit (5) for receiving two input sinusoidal signals from the two antenna connections (LA, LB) and generating a rectified waveform signal (8), a modulation detection circuit (12) for receiving two input sinusoidal signals from the two antenna connections (LA, LB) and generating a first demodulation signal (13) related to a 10% amplitude modulation of a RF field for communication between the reader and the RFID tag (1) and a second demodulation signal (14) related to a 100% amplitude modulation of a RF field for communication between the reader and the RFID tag (1).
    Type: Grant
    Filed: December 8, 2018
    Date of Patent: November 24, 2020
    Assignee: NXP B.V.
    Inventor: Jaydeep Girishkumar Dalwadi
  • Patent number: 10644715
    Abstract: An analog-to-digital converter (ADC) module includes a plurality of frequency stacked ADCs. A splitter splits channels into two segments to transmit the signal through respective low pass and high pass filters to send the analog signal to a low frequency ADC and a high frequency ADC along each channel. When using a quad-tuner having four channels, there are eight ADCs: four high frequency ADCs and four low frequency ADCs. Typically, there is one ADC associated with each channel. Thus, a quad-tuner would be used with an ADC module having four ADCs. However, by splitting and filtering each channel and increasing the number of ADCs in the ADC module, the system, assembly, and method in the present disclosure is able to increase the frequency bandwidth throughput along legacy radio frequency (RF) cables on a platform without the need of replacing any legacy hardware or the legacy RF cables.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: May 5, 2020
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Bryan A. Thibideau, David A. Brigham, Gregory S. Laste, Timothy Naylor, Jonathan E. Oppelaar
  • Patent number: 10594281
    Abstract: An automatic gain control system for a receiver for an asymmetrical and/or unbalanced constellation, the system including: an automatic gain control loop adapted to be coupled to both a first transimpedance amplifier coupled to a first analog-to-digital converter forming a first tributary and a second transimpedance amplifier coupled to a second analog-to-digital converter forming a second tributary; wherein the automatic gain control loop is operable for providing an offset gain control voltage to gain balance a transimpedance amplifier voltage and a power associated with the first tributary and a transimpedance amplifier voltage and a power associated with the second tributary. The automatic gain control loop includes an analog automatic gain control loop. The automatic gain control loop is implemented in hardware or firmware.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: March 17, 2020
    Assignee: Ciena Corporation
    Inventors: Tom Luk, Ron Hartman
  • Patent number: 10469110
    Abstract: In a noise canceller device, interference signal adjustment units adjust delay, phase and amplitude of a signal received by a sub antenna under different conditions to obtain adjustment signals, and subtract the adjustment signals from a signal received by a main antenna to obtain differential signals. An average power calculation unit calculates an average power for each of the differential signals. An optimal condition search unit determines the values of delay, phase and amplitude that result in the minimum average power, and sets the values in an optimal interference signal adjustment unit. The optimal interference signal adjustment unit adjusts the signal received by the sub antenna using optimal values for delay, phase and amplitude to obtain an optimal adjustment signal. A cancellation unit subtracts the optimal adjustment signal from the signal received by the main antenna to remove interference signals, and outputs a desired signal to a host device.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: November 5, 2019
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Yoichi Kushioka, Koji Yotsumoto, Mitsuhiro Takashima
  • Patent number: 10440720
    Abstract: A co-channel interference cancellation method and apparatus are provided. The method includes: obtaining effective interference by filtering co-channel interference according to a preset interference strength threshold, and obtaining a plurality of effective interference subgroups by grouping the effective interference; obtaining a reference interference sub-signal corresponding to the effective interference subgroup, by delaying a reference interference signal according to a determined interference delay of each effective interference subgroup; after each reference interference sub-signal passes through a corresponding adaptive interference reconstruction filter, obtaining a reconstructed interference signal by overlaying each reference interference sub-signal; and performing a subtraction operation on a received signal and the reconstructed interference signal. In this way, spectrum consumption is greatly reduced, and implementation is simple.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: October 8, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Qiao Liu, Xiaodong Li
  • Patent number: 10433305
    Abstract: A solution for operating a radio communication apparatus communicating with at least one other apparatus is provided. In communication, a frequency block of a set of frequency blocks having a given center frequency is utilized. The center frequencies of at least some adjacent frequency blocks are separated by a given frequency offset. The offset is selected such that the adjacent frequency blocks are partly overlapping and the apparatus receiving a given frequency interprets a signal separated from the given signal by the offset as noise.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: October 1, 2019
    Assignee: KYYNEL OY
    Inventors: Matti Raustia, Teemu Vanninen
  • Patent number: 10243709
    Abstract: A method (200) of determining mutual information of a composite receive signal, the composite receive signal comprising a reference signal and a data signal, includes the following acts: estimating (201) a base metric of the composite receive signal based on the reference signal, the base metric being indicative of a channel quality; and determining (202) the mutual information based on the base metric and the data signal.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: March 26, 2019
    Assignee: Intel IP Corporation
    Inventors: Yeong-Sun Hwang, Ismael Gutierrez, Andreas Bury
  • Patent number: 10177836
    Abstract: A relay including a first transmitter that converts a first digital transmit signal to a first analog transmit signal, a first receiver that converts a first analog receive signal to a first digital receive signal, a second transmitter that converts a second digital transmit signal to a second analog transmit signal, a second receiver that converts a second analog receive signal to a second digital receive signal, and a self-interference canceller that generates a first self-interference cancellation signal based on at least one of the first digital transmit signal and the first analog transmit signal, and combines the first self-interference cancellation signal with at least one of the first digital receive signal and the first analog receive signal.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: January 8, 2019
    Assignee: Kumu Networks, Inc.
    Inventors: Steven Hong, Jeffrey Mehlman, Joel Brand, Jung-Il Choi, Mayank Jain
  • Patent number: 10171215
    Abstract: Disclosed are methods and systems for segregating user equipment devices (UEs) among carriers to help facilitate operation in lean-carrier mode in which a base station (BS) engages in a reduced extent of reference signaling on a particular carrier. In practice, the BS may operate in the lean-carrier mode when bearer data is not being communicated on the particular carrier. Given this arrangement, the BS may identify one or more UEs, of a plurality of UEs served by the BS, based on each UE communicating bearer data less frequently than a threshold frequency of bearer data communication. And the BS may serve just the identified UEs on the particular carrier, thereby increasing a probability of the BS operating in the lean-carrier mode.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: January 1, 2019
    Assignee: Sprint Spectrum L.P.
    Inventors: Siddharth S. Oroskar, Jasinder P. Singh
  • Patent number: 10090940
    Abstract: A method for calibrating an antenna array coupled to a plurality of transmitters via a plurality of couplers and a plurality of antenna element feeds is described.
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: October 2, 2018
    Assignee: Analog Devices Global
    Inventors: Conor O'Keeffe, Michael O'Brien, Sean Sexton
  • Patent number: 10070325
    Abstract: An antenna apparatus for use in a wireless network and method of operating such an antenna apparatus are provided. The antenna apparatus has omnidirectional antenna elements and RF chains, where there are fewer RF chains than omnidirectional antenna elements. A subset of the omnidirectional antenna elements are coupled to the RF chains and sampling circuitry coupled to the RF chains samples the signals received by the subset of the omnidirectional antenna elements. This forms part of a signal detection process in which different subsets of the omnidirectional antenna elements are iteratively coupled to the RF chains. A signal sample spatial covariance matrix for the omnidirectional antenna elements is constructed from the signals sampled by the sampling circuitry at each iteration and a beamforming algorithm applied to the signal sample spatial covariance matrix parameterizes the signals received by the omnidirectional antenna elements.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: September 4, 2018
    Assignee: AIRSPAN NETWORKS INC.
    Inventor: Andrew Logothetis
  • Patent number: 9985777
    Abstract: A radio frequency (RF) receiver may comprise a first sampling module that is operable to sample in a first level at a particular main sampling rate; a plurality of second-level sampling modules, wherein each of the plurality of second-level sampling modules is operable to sample in a second level, an output of the first level, at a second sampling rate that is reduced compared to the main sampling rate; and a plurality of third-level modules, each comprising a plurality of third-stage sampling sub-modules that are operable to sample at a third sampling rate that is reduced compared to the second sampling rate, and a plurality of corresponding analog-to-digital conversion (ADC) sub-modules.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: May 29, 2018
    Assignee: MAXLINEAR, INC.
    Inventors: Jianyu Zhu, Sheng-Yu Peng, Rodney Chandler, Pawan Tiwari, Rahul Bhatia, Eric Fogleman
  • Patent number: 9942598
    Abstract: A wideband receiver system comprises a mixer module, a wideband analog-to-digital converter (ADC) module, and digital circuitry. The mixer module is configured to downconvert a plurality of frequencies that comprises a plurality of desired television channels and a plurality of undesired television channels. The wideband ADC module is configured to digitize the swatch of frequencies comprising the plurality of desired television channels and the plurality of undesired television channels. The digital circuitry is configured to select the desired plurality of television channels from the digitized plurality of frequencies, and output the selected plurality of television channels to a demodulator as a digital datastream.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: April 10, 2018
    Assignee: Maxlinear, Inc.
    Inventors: Madhukar Reddy, Curtis Ling, Tim Gallagher
  • Patent number: 9781612
    Abstract: Representative implementations of devices and techniques provide self-interference suppression for a transceiver of a wireless communication system. To minimize interference from a transmit signal appearing on a receive path of the system, a cross-correlation is minimized between the transmit signal and a desired receive signal.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: October 3, 2017
    Assignee: Intel IP Corporation
    Inventors: Emil Buskgaard, Elpiniki Tsakalaki, Osama Nafeth Alrabadi, Mikael Bergholz Knudsen, Gert Pedersen, Alexandru Daniel Tatomirescu, Poul Olesen, Peter Bundgaard, Pevand Bahramzy
  • Patent number: 9756519
    Abstract: One example includes a rate detector system. The rate detector system includes a plurality of energy detectors configured to receive an input signal and to filter separate respective frequency bands associated with the input signal to generate separate respective energy profiles. The system also includes an energy processing component configured to determine a symbol rate of the input signal based on a statistical evaluation of a ratio of the separate respective energy profiles.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: September 5, 2017
    Assignee: Northrop Grumman Systems Corporation
    Inventor: Christopher W. Walker
  • Patent number: 9654192
    Abstract: A method and apparatus for a channel feedback by a signal transmitting device in a Multiple Input Multiple Output (MIMO) system are provided. The method includes transmitting a pilot in which a compression rate is reflected to a signal receiving device; receiving channel related information on a compressed channel from the signal receiving device; and performing a precoding based on the channel related information. The apparatus includes a transmitting unit configured to transmit a pilot to which a compression rate is reflected to a signal receiving device; a receiving unit configured to receive channel related information on a compressed channel from the signal receiving device; and a precoding unit configured to perform a precoding based on the channel related information.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: May 16, 2017
    Assignees: Samsung Electronics Co., Ltd, Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Hyoung-Youl Yu, Chan-Byoung Chae, Yeon-Geun Lim, Young-Woo Kwak, Hyo-Jin Lee, Hyoung-Ju Ji, Youn-Sun Kim
  • Patent number: 9525532
    Abstract: A method of transmitting signals by a transmitting side device having multiple antennas (hereinafter ‘N antennas’) is disclosed. In this method, the transmitting side device transmits reference signals (RSs) via M antenna among the N antennas, where M?N, where one or more of M and a sequence of antenna numbers used for transmitting RSs informs a receiving side device of first information for data transmission, and where the RSs are used by the receiving side device for identifying second information for channel estimation. Transmitting side device transmits data to the receiving side device according to the first information.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: December 20, 2016
    Assignee: LG Electronics Inc.
    Inventors: Hyunsoo Ko, Heejeong Cho, Hyeyoung Choi, Ilmu Byun, Kungmin Park
  • Patent number: 9503292
    Abstract: A method for calculating a feed forward equalizer coefficient of a feed forward equalizer in a minimum mean square error decision feedback equalizer (MMSE-DFE) based on a fast transversal recursive least squares (FT-RLS) algorithm is provided. The length of the feed-forward equalizer is LF, which is a positive integer. The method includes an outer iteration having an LF number of iterations. The outer iteration includes an inner iteration having an n number of iterations, where n is an integer between 0 and (LF?2).
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: November 22, 2016
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventors: Ching-Wen Ma, Chih-Cheng Kuo, Tai-Lai Tung, Chih-Ching Chen
  • Patent number: 9445376
    Abstract: Compensation is provided for foreign interference within a cell. Uplink (UL) noise on an UL channel to a first base station (BS) device is detected. Whether the UL noise includes interference is determined. Interference can include any device other than a mobile device configured to communicate with a BS device associated with a cell. The first service area of the BS device can be modified, e.g., scaled based on determining that the UL noise includes interference. Scaling can include reducing the first service area to a second service area that does not include an imbalance region in the first service area caused by the foreign interference. Scaling can be effected by reducing the amount of downlink power from the first BS device, or by adjusting a re-selection parameter associated with reducing the range of the BS device.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: September 13, 2016
    Assignee: AT&T MOBILITY II LLC
    Inventors: Arthur Richard Brisebois, Michael Stephens
  • Patent number: 9432948
    Abstract: A method of automatic transmit power control in a radio communication system employing a co-channel dual-polarized radio link between a first radio station and a second radio station. The method comprises receiving a horizontal polarized signal and a vertical polarized signal transmitted from the second radio station to the first radio station and in the first radio station estimating a received power level value from said received horizontal polarized signal, and a received power level value from said received vertical polarized signal. Determined power corrections values are transmitted to the second radio station during a transmission of the first radio station to adjust the transmit power of the second radio station. The determining of said transmit power correction values are independently determined from said estimated received power level values, a target power value, a cross polarization interference threshold level value, and said cross polarization interference level values.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: August 30, 2016
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Giovanni Milotta, Antonio Carugati
  • Patent number: 9379842
    Abstract: A method and base station for adjusting outer-loop adjustment values used for link adaptation in a wireless communication network is provided. A modulation of a user equipment is determined and a success or failure of a Transport Block (TB) based on a TB feedback message is determined. Based on the TB feedback, one of an acknowledgement counter and a non-acknowledgement counter is incremented corresponding to the determined modulation. An upward step size for the determined modulation is updated based on the respective acknowledgement counter and the non-acknowledgement counter to affect link adaption.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: June 28, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Xixian Chen, Hong Ren, Edward Mah, Shiguang Guo, Ping Yu, Guoqiang Lu
  • Patent number: 9332545
    Abstract: A Method and System For Optimizing The Efficiency of SIGINT Collection Systems on Mobile Platforms with Limited Bandwidth Connections that is implementable in legacy signal collection systems. The resultant system first reduces potential upload bandwidth by eliminating whitespace in collected signals. Next, the system ignores collectable signals based on signals frequency or angle of arrival so as to identify energy of interest. Next, the system score and attributes a priority to each energy of interest, now known as signals of interest. The system then increases collection bandwidth on all signals of interest based on the score, priority and availability of resources. Finally, in real time, and based on SOI score and priority and the availability of downlink resources, the collected signal data is downlinked to the SIGINTcontrol center.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: May 3, 2016
    Assignee: Spectranetix, Inc.
    Inventor: Lars Karlsson
  • Patent number: 9268981
    Abstract: Systems and methods for reading RFID tags using joint beamforming and preamble detection in accordance with embodiments of the invention are disclosed. One embodiment includes an antenna array comprising a plurality of antenna elements, a joint beamformer and preamble detector configured to receive inputs from each of the antenna elements, and a decoder configured to receive a resampled signal from the joint beamformer and preamble detector and to decode data using the resampled signal. In addition, the joint beamformer and preamble detector is configured to correlate the inputs from the antenna elements against a correlation sequence at a plurality of starting sample positions and predetermined rates, use the correlations to select a starting sample position and rate for decoding the received signal, use the correlations to determine beamforming coefficients for combining the inputs, and resample the combined inputs based upon the selected starting sample position and rate.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: February 23, 2016
    Assignee: Mojix, Inc.
    Inventors: Dong-U Lee, Christopher R. Jones
  • Patent number: 9252826
    Abstract: A method of correlating a digital communications signal is described. In an example, a window is defined equal to a portion of an epoch of the digital communication signal. The digital communication signal is then correlated across the window. A determination is made as to whether a correlation peak results from the correlating. Timing parameters are then established for receiving additional digital communication signals in response to presence of the correlation peak.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: February 2, 2016
    Assignee: Broadcom Corporation
    Inventors: Frank Van Diggelen, Charles Abraham
  • Patent number: 9237044
    Abstract: One embodiment relates to a computer-implemented method that selects one of at least three procedures to determine equalization settings jointly for a transmitter and a receiver. A first process may be used if the end-of-channel signal-to-noise ratio (SNR) is greater than an SNR threshold and the equalization capability of the transmitter is greater than the equalization capability of the receiver. A second process may be used if the end-of-channel SNR is greater than the SNR threshold and the equalization capability of the transmitter is less than the equalization capability of the receiver. A third process may be used if the end-of-channel SNR is less than the SNR threshold. Other embodiments and features are also disclosed.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: January 12, 2016
    Assignee: Altera Corporation
    Inventors: Hsinho Wu, Masashi Shimanouchi, Peng Li
  • Patent number: 9218575
    Abstract: I/O parameters are adjusted based on a number of errors detected in a received training signal. A controller device sends the training signal while a memory device is in a training mode. The memory device samples the training signal and the system causes an adjustment to at least one I/O parameter based on a detected number of errors. Either the controller or the memory device can perform the error detection, depending on the configuration of the system. Either an I/O parameter of the controller or an I/O parameter of the memory device can be adjusted, depending on the configuration of the system.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: December 22, 2015
    Assignee: Intel Corporation
    Inventors: Christopher P. Mozak, James A. McCall
  • Patent number: 9219550
    Abstract: A system receive, from an optical receiver, a signal derived from a first optical signal and a second optical signal generated by a local oscillator, that includes a first component that is an in-phase component and a second component that is a quadrature phase component; filter the signal, using a filter, set to one or more configurations, to obtain one or more recovered signals, where each of the recovered signals includes a respective quantity of noise; perform forward error correction, on the recovered signals, to obtain one or more quantities of bit errors that correspond to the recovered signals; and process the signal using the filter set to a particular configuration, of the one or more configurations, that corresponds to a lowest quantity of bit errors of the one or more quantities of bit error.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: December 22, 2015
    Assignee: Infinera Corporation
    Inventors: Jeffrey T. Rahn, Gilad Goldfarb
  • Patent number: 9214185
    Abstract: A data processing system includes an adaptive notch filter operable to estimate an interference frequency in data samples, a convergence detector operable to determine whether the interference frequency converges on a value, indicating that the data samples contain interference, and an interference removal circuit operable to remove interference detected by the adaptive notch filter from the data samples.
    Type: Grant
    Filed: June 29, 2014
    Date of Patent: December 15, 2015
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Xiufeng Song, George Mathew
  • Patent number: 9191046
    Abstract: An FFT unit subjects a P-times oversampling output of an AD converter to Fourier transform into a frequency domain signal. A distortion estimation unit estimates a distortion characteristic from a difference between the frequency domain signal and a reference signal. A correction coefficient calculation unit calculates a correction coefficient of a distortion characteristic. A correction unit corrects the frequency domain signal by using the correction coefficient. An IFFT unit subjects the corrected frequency domain signal to inverse Fourier into a time domain signal having the same sampling speed as a symbol speed, and outputs a partial time series.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: November 17, 2015
    Assignee: Panasonic Corporation
    Inventors: Naganori Shirakata, Takenori Sakamoto, Naoya Yosoku
  • Patent number: 9143214
    Abstract: A transmitter includes first generator to generate pilot source signal by modulating pilot sequence, second generator to generate data source signal with time length longer than that of pilot source signal by modulating data sequence, first cyclic shifter to perform cyclic shift of first shift amount to pilot source signal to generate first pilot signal, second cyclic shifter to performs cyclic shift of second shift amount to data source signal to generate first data signal, third cyclic shifter to perform cyclic shift of third shift amount to pilot source signal to generate second pilot signal, fourth cyclic shifter to perform cyclic shift of fourth shift amount to data source signal to generate second data signal, first transmit antenna to transmit first pilot signal and first data signal, and second transmit antenna to transmit second pilot signal and second data signal.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: September 22, 2015
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Ren Sakata, Koji Akita
  • Publication number: 20150146828
    Abstract: Disclosed are a method of cancelling inter-subcarrier interference in a distributed antenna system, and a device for performing the same. The method of cancelling the interference performed in a receiver includes: generating a first signal and a second signal by performing a fast Fourier transform (FFT) operation on a received signal received from a first transmission antenna and a second transmission antenna; acquiring first symbols by combining the first signal and the second signal; generating a first interference signal and a second interference signal based on the first symbols; generating a third signal by cancelling the first interference signal from the first signal, and generating a fourth signal by cancelling the second interference signal from the second signal; and acquiring second symbols by combining the third signal and the fourth signal.
    Type: Application
    Filed: November 25, 2014
    Publication date: May 28, 2015
    Inventors: Bong Seok KIM, Kwon Hue CHOI
  • Publication number: 20150146805
    Abstract: A system and method for aggregation of a plurality of wireless communication signals in a common radio frequency transmitter. A multiple subchannel multiplexed (MSM) signal within a frequency band, and having a communication protocol with pilot signals estimating a channel state and efficient signal demodulation with a mobile receiver is combined with another signal. An automated digital processor at the transmitter modifies the MSM to meet at least one fitness criterion of the combined signal, selected from among alternatives that will maintain good reception of all transmitted signals within system protocols, without requiring transmitting additional side information specifying the modification. The range of alternates include modifications that disrupt the pilot signals.
    Type: Application
    Filed: November 25, 2014
    Publication date: May 28, 2015
    Inventor: John David Terry
  • Patent number: 9042497
    Abstract: A system that incorporates the subject disclosure may include, for example, a process that includes adjusting a filter in electrical communication between an input terminal and a demodulator. The filter is applied to an information bearing signal, e.g., to mitigate interference, received at the input terminal, resulting in a filtered signal. An error signal is received, indicative of errors detected within information obtained by demodulation of a modulated carrier of the filtered signal. A modified filter state is determined in response to the error signal and the filter is adjusted according to the modified filter state, e.g., to improve mitigation of the interference. Other embodiments are disclosed.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: May 26, 2015
    Assignee: ISCO International, LLC
    Inventors: Amr Abdelmonem, Mikhail Galeev, Sean S. Cordone, Howard Wong
  • Patent number: 9042429
    Abstract: A radio receiver apparatus includes a serving cell detector configured to generate a detected serving cell signal based on a serving cell detector input signal. The radio receiver apparatus further includes a first interfering cell detector configured to generate a detected first interfering cell signal based on a first interfering cell detector input signal and a first interfering cell synthesizer configured to generate synthesized first interfering cell signal based on the detected first interfering cell signal. A serving cell interference removing unit is configured to remove the synthesized first interfering cell signal from a serving cell signal to generate the serving cell detector input signal.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: May 26, 2015
    Assignee: Intel Mobile Communications GmbH
    Inventors: Christian Faber, Andreas Senst, Manfred Zimmermann, Lothar Winkler