Maximum Likelihood Decoder Or Viterbi Decoder Patents (Class 375/341)
  • Patent number: 11483011
    Abstract: Provided are a decoding method, a decoding device and a decoder. The method includes: setting a decoder parallelism P, and splitting soft information of a block to be decoded according to the parallelism P; performing decoding calculation on the block to be decoded according to the split information, and outputting decoded hard bit information; and recombining the hard bit information according to the parallelism P.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: October 25, 2022
    Assignee: ZTE CORPORATION
    Inventors: He Zhang, Xiong Tang, Wei Zhang, Chaozheng Chen, Xiaoliang Li, Zouzhang Wen
  • Patent number: 11477052
    Abstract: A radio receiver of a radio communication system is configured to tune to a radio channel by generating a periodic signal, mixing the periodic signal with radio signals received from a radio transmission system and passing the mixed signal through a channel filter. The radio receiver receives, from the radio transmission system, an OFDM data signal modulated on a set of OFDM subcarriers within the tuned channel. The channel filter has a passband that is wider than the channel bandwidth of the tuned channel such that the filter passes i) said OFDM data signal, ii) an in-channel reference signal, and iii) an out-of-channel reference signal. The radio receiver comprises channel estimation logic configured to use both reference signals to calculate a channel estimate for an OFDM subcarrier within the tuned channel.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: October 18, 2022
    Assignee: Nordic Semiconductor ASA
    Inventor: Kjell Östman
  • Patent number: 11462034
    Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for generating images using neural networks. One of the methods includes generating the output image pixel by pixel from a sequence of pixels taken from the output image, comprising, for each pixel in the output image, generating a respective score distribution over a discrete set of possible color values for each of the plurality of color channels.
    Type: Grant
    Filed: March 10, 2021
    Date of Patent: October 4, 2022
    Assignee: DeepMind Technologies Limited
    Inventors: Aaron Gerard Antonius van den Oord, Nal Emmerich Kalchbrenner, Karen Simonyan
  • Patent number: 11394505
    Abstract: Wireless communications systems and methods related to system information communications and decoding are provided. In one embodiment, a wireless communication device receives one or more known bits. The wireless communication device receives a first encoded information block. The wireless communication device decodes the first encoded information block to generate a first information block based on the one or more known bits. In one embodiment, a wireless communication device receives a first encoded information block including a first bit pattern. The wireless communication device receives a second encoded information block including a second bit pattern. The wireless communication device jointly decodes the first encoded information block and the second encoded information block based on an assumption that a difference between the first bit pattern and the second bit pattern is within a subset of a plurality of bit-change patterns.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: July 19, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Kapil Bhattad, Alberto Rico Alvarino, Hao Xu
  • Patent number: 11394401
    Abstract: An interleaved encoder includes a number of encoders consisting of L parallel encoders, and a first switch circuit to sequentially couple an input node to an input port of one of the encoders. The input node receives a group of K*L symbols. Each symbol of the group of K*L symbols is received in synch with a respective clock pulse of a group of K*L clock pulses. The first switch circuit is synched with clock pulses of the group of K*L clock pulses, and sequentially couples the input node to an input port of a subsequent one of the encoders in response to each clock pulse of the group of K*L clock pulses.
    Type: Grant
    Filed: February 3, 2021
    Date of Patent: July 19, 2022
    Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED
    Inventors: Chungming Tu, Thomas V. Souvignier, Ahmad Darabiha
  • Patent number: 11394423
    Abstract: A method for pseudo channel hopping in a node of a wireless mesh network is provided that includes scanning each channel of a plurality of channels used for packet transmission by the node, wherein each channel is scanned for a scan dwell time associated with the channel, updating statistics for each channel based on packets received by the node during the scanning of the channel, and changing scan dwell times of the plurality of channels periodically based on the statistics.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: July 19, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Kaichien Tsai, Arvind Kandhalu Raghu, Ramanuja Vedantham
  • Patent number: 11349531
    Abstract: The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval will include numerous traffic symbols and two or more short pilot symbols, which are spaced apart from one another by at least one traffic symbol and will have a Fourier transform length that is less than the Fourier transform length of any given traffic symbol. Multiple transmitters will generate pilot information and modulate the pilot information onto sub-carriers of the short pilot symbols in an orthogonal manner. Each transmitter may use different sub-carriers within the time and frequency domain, which is encompassed by the short pilot symbols within the transmit time interval. Alternatively, each transmitter may uniquely encode the pilot information using a unique code division multiplexed code and modulate the encoded pilot information onto common sub-carriers of the short pilot symbols.
    Type: Grant
    Filed: September 1, 2020
    Date of Patent: May 31, 2022
    Assignee: Apple Inc.
    Inventors: Jianglei Ma, Ming Jia, Hua Xu, Wen Tong, Peiying Zhu, Moussa Abdi
  • Patent number: 11328176
    Abstract: An information processing apparatus includes a memory; and a processor configured to determine a plurality of initial image processing programs and to add the initial image processing programs to an image processing program group, extract at least two image processing programs from the image processing program group, generate a candidate of a next-generation image processing program from the extracted image processing programs, based on genetic programming, calculate a fitness of the candidate of the next-generation image processing program, using a learning data item including an input image and a target processing result, and determine the next-generation image processing program or update the image processing program group based on the calculated fitness, wherein the processor is configured to determine, as some of the initial image processing programs, at least some of first image processing programs included in the image processing program group upon previous determination of a next-generation image proc
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: May 10, 2022
    Assignee: FUJITSU LIMITED
    Inventors: Tsuyoshi Nagato, Hiroaki Okamoto, Tetsuo Koezuka
  • Patent number: 11283652
    Abstract: A communication system and method is disclosed, applicable to the mobile communication using pilot-free channel estimation. In the uplink multiple access, the present invention utilizes the gain division multiple access (GDMA) technology to allow multiple users to share the same resource by utilizing the knowledge of different channel coefficients (channel gains) to distinguish signals transmitted by different users when the transmissions are over different and independent fading channels. Without using pilot signals for channel estimation, the present invention uses the clustering algorithm and the geometrical configuration of the superimposed signals for the superimposed signal sequence received by the base station to implement the estimation of channel gains corresponding to multiple users, and, according to the estimated channel gains, the GDMA technology is utilized to recover the original message transmitted by each user.
    Type: Grant
    Filed: May 5, 2020
    Date of Patent: March 22, 2022
    Assignee: NATIONAL TAIWAN UNIVERSITY
    Inventors: Mao-Chao Lin, Yung-Tsao Hsu
  • Patent number: 11283544
    Abstract: Provided are a QR decomposition-based detection method and apparatus based on overlapped multiplexing. The QR decomposition-based detection method includes: step S1: obtaining a receive sequence, where the receive sequence is a sequence obtained by encoding and modulating an input signal based on a multiplexing waveform matrix and transmitting the signal through a Gaussian channel; and step S2: detecting the receive sequence by using a QR decomposition algorithm, where step S2 includes: decomposing a foreknown multiplexing waveform matrix into a unitary matrix and an upper triangular matrix; performing matrix multiplication processing on the receive sequence based on the unitary matrix, to obtain a data sequence; and performing layer-by-layer detection on the data sequence based on the data sequence, the upper triangular matrix, and a quantized decision factor.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: March 22, 2022
    Assignee: SHEN ZHEN KUANG-CHI HEZHONG TECHNOLOGY LTD.
    Inventors: Ruopeng Liu, Chunlin Ji, Lin You
  • Patent number: 11277226
    Abstract: A transmitter apparatus wherein a simple structure is used to successfully suppress the degradation of error rate performance that otherwise would be caused by fading or the like. There are included encoding parts that encode transport data; a mapping part that performs such a mapping that encoded data sequentially formed by the encoding parts are not successively included in the same symbol, thereby forming data symbols; and a symbol interleaver that interleaves the data symbols. In this way, a low computational complexity can be used to perform an interleaving process equivalent to a bit interleaving process to effectively improve the reception quality at a receiving end.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: March 15, 2022
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Yutaka Murakami, Shutai Okamura, Kiyotaka Kobayashi, Masayuki Orihashi, Kazuaki Takahashi
  • Patent number: 11271596
    Abstract: A method and an apparatus are provided for decoding a polar code. A simplified successive cancellation list (SSCL) decoding tree for the polar code is generated. The SSCL decoding tree includes a plurality of nodes. One or more nodes of the plurality of nodes are identified as employing Reed-Muller codes for decoding. Decoding of received log-likelihood ratios (LLRs) is performed using Reed-Muller codes at the one or more nodes. Hard decision values are output from the one or more nodes.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: March 8, 2022
    Inventors: Nadim Ghaddar, Hamid Saber, Hsien-Ping Lin, Jung Hyun Bae
  • Patent number: 11265023
    Abstract: A transmitting apparatus is provided. The transmitting apparatus includes: an encoder configured to generate a low-density parity check (LDPC) codeword by LDPC encoding of input bits based on a parity check matrix including information word bits and parity bits, the LDPC codeword including a plurality of bit groups each including a plurality of bits; an interleaver configured to interleave the LDPC codeword; and a modulator configured to map the interleaved LDPC codeword onto a modulation symbol, wherein the interleaver is further configured to interleave the LDPC codeword such that a bit included in a predetermined bit group from among the plurality of bit groups constituting the LDPC codeword onto a predetermined bit of the modulation symbol.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: March 1, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung-joong Kim, Se-ho Myung, Hong-sil Jeong, Daniel Ansorregui Lobete, Belkacem Mouhouche
  • Patent number: 11252603
    Abstract: Embodiments of the present invention provide a method and apparatus for enhanced data retransmission based on log-likelihood ratio (LLR) combining in WLAN. According to some embodiments, packets can be retransmitted using a modified transmission scheme. Packets that are received with an error are stored, and a subsequent packet is received that includes data that can be used to correct the error. For example, each packet can be encoded for both error detection and correction, and the retransmission mechanism can be adapted to the error rate. The retransmission scheme is improved by utilizing an LLR combining scheme, transmit diversity, and modified ACK methods.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: February 15, 2022
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Jianhan Liu, Yongho Seok, Chung-Ta Ku, Thomas Edward Pare, Jr.
  • Patent number: 11246099
    Abstract: By switching the transmission mode according to the power amount of a power storage unit in a wireless communication terminal, appropriate communication performance is ensured. A communication unit transmits a packet. A comparison unit compares the power amount of the power storage unit with a predetermined threshold. A control unit causes the communication unit to transmit first transmission data in a first transmission mode in a case where the power amount of the power storage unit is larger than a predetermined threshold. Furthermore, the control unit causes the communication unit to transmit second transmission data including a known payload in a second transmission mode in a case where the power amount of the power storage unit is not larger than the predetermined threshold.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: February 8, 2022
    Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
    Inventors: Yusuke Yoneyama, Ryo Takai
  • Patent number: 11240074
    Abstract: A communication device includes a zero-forcing equalizer that receives a receipt signal and execute zero-forcing equalization on the receipt signal, a partial response equalizer that receives the receipt signal and execute partial response equalization on the receipt signal, a first weighted value calculator that calculates a first weighted value based on signal quality of the receipt signal output from the zero-forcing equalizer, a second weighted value calculator that calculates a second weighted value based on signal quality of the receipt signal output from the partial response equalizer, and an estimator that estimates a maximum likelihood sequence by supplying the first weighted value to state transition based on output by the zero-forcing equalizer and supplying the second weighted value to state transition based on output by the partial response equalizer.
    Type: Grant
    Filed: February 25, 2021
    Date of Patent: February 1, 2022
    Assignee: MEGACHIPS CORPORATION
    Inventors: Shinichi Murata, Taiji Kondo, Yoshiki Yokoyama
  • Patent number: 11218177
    Abstract: Various aspects of the disclosure relate to rate matching techniques for block encoding. In some aspects, a decision regarding whether to use repetition-based rate matching or puncture-based rate matching is made based on a block size of information being encoded. In some aspects, repetition-based rate matching uses a bit-reversal permutation technique.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: January 4, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Changlong Xu, Jian Li, Chao Wei, Jilei Hou
  • Patent number: 11190166
    Abstract: The present invention provides a system and method for representing quasi-periodic (“qp”) waveforms comprising, representing a plurality of limited decompositions of the qp waveform, wherein each decomposition includes a first and second amplitude value and at least one time value. In some embodiments, each of the decompositions is phase adjusted such that the arithmetic sum of the plurality of limited decompositions reconstructs the qp waveform. These decompositions are stored into a data structure having a plurality of attributes. Optionally, these attributes are used to reconstruct the qp waveform, or patterns or features of the qp wave can be determined by using various pattern-recognition techniques. Some embodiments provide a system that uses software, embedded hardware or firmware to carry out the above-described method. Some embodiments use a computer-readable medium to store the data structure and/or instructions to execute the method.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: November 30, 2021
    Assignee: Murata Vios, Inc.
    Inventors: Carlos A. Ricci, Vladimir V. Kovtun
  • Patent number: 11177816
    Abstract: Apparatus and methods for clock synchronization and frequency translation are provided herein. Clock synchronization and frequency translation integrated circuits (ICs) generate one or more output clock signals having a controlled timing relationship with respect to one or more reference signals. The teachings herein provide a number of improvements to clock synchronization and frequency translation ICs, including, but not limited to, reduction of system clock error, reduced variation in clock propagation delay, lower latency monitoring of reference signals, precision timing distribution and recovery, extrapolation of timing events for enhanced phase-locked loop (PLL) update rate, fast PLL locking, improved reference signal phase shift detection, enhanced phase offset detection between reference signals, and/or alignment to phase information lost in decimation.
    Type: Grant
    Filed: October 19, 2020
    Date of Patent: November 16, 2021
    Assignee: Analog Devices, Inc.
    Inventors: Neil E. Weeks, Reuben P. Nelson
  • Patent number: 11165446
    Abstract: A Viterbi traceback processing method, system, and apparatus are provided wherein a first Viterbi traceback processing operation (MUX 514) is performed on a first survivor path metric (TMV1) by selecting, in response to a back track state (INDEX 0), a first output data bit (Ti1) for the first survivor path metric, wherein a plurality of Viterbi traceback processing operations (MUX 512, 513) are performed on respective portions of an additional survivor path metric (TMV2A, TMV2B) by selecting, in response to a shifted back track state (INDEX 1), candidate data bits (Tn1, Tn2) for the additional survivor path metric, wherein a multiplexer (MUX 518) controlled by the first output data bit selects between the candidate data bits to generate an additional output data bit (Ti2) for the additional survivor path metric such that the Viterbi traceback processing operations are performed in parallel to produce the output data bits.
    Type: Grant
    Filed: November 5, 2020
    Date of Patent: November 2, 2021
    Assignee: NXP B.V.
    Inventor: Stefan Quitzk
  • Patent number: 11153854
    Abstract: A method, apparatus, and computer program for controlling allocation of control message fields in uplink transmission in a cellular telecommunication system are presented. Uplink control message fields are allocated to the resources of a physical uplink shared traffic channel according to an uplink transmission scheme selected for a user terminal. The control message fields are allocated so that transmission performance of the control messages is optimized for the selected uplink transmission scheme.
    Type: Grant
    Filed: December 31, 2018
    Date of Patent: October 19, 2021
    Assignee: WIRELESS FUTURE TECHNOLOGIES INC.
    Inventors: Timo E. Lunttila, Kari P. Pajukoski, Esa T. Tiirola
  • Patent number: 11133973
    Abstract: Methods and apparatus for facilitating wireless communication using digital Quadrature Amplitude Modulation are disclosed. A wireless communication device utilizes a signal constellation for quadrature modulating a signal for transmission or quadrature demodulating a received signal. The signal constellation includes multiple constellation symbols and associated bit sequences, which can be translated there between. Specific signal constellations are disclosed.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: September 28, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Guido Montorsi, Sergio Benedetto, Yan Xin, Min Yan, Wei Lin
  • Patent number: 11133963
    Abstract: Apparatus and associated methods relate to targeted digital correction of a predetermined component of inter-symbol interference (ISI) associated with two or more ranks of cascaded track-and-hold (T/H) front-end circuits of a Time-Interleaved analog-to-digital converter (TI-ADC). In an illustrative example, for two T/H circuit ranks of size N and M, the predetermined component to be compensated may be located at (N×M)th unit interval (UI). A feed forward equalizer (FFE) and/or a decision feedback equalizer (DFE) in a digital signal processing system (DSP) may be then configured to have extra taps and corresponding expanded equalization ranges to mitigate the ISI. Thus, a deterministic ISI component at the N×Mth UI may be digitally corrected by providing equalization with N×M taps at low cost to facilitate scaling to higher bit rates.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: September 28, 2021
    Assignee: XILINX, INC.
    Inventors: Kevin Zheng, Ronan Casey
  • Patent number: 11102049
    Abstract: Methods and apparatus for facilitating wireless communication using digital Quadrature Amplitude Modulation are disclosed. A wireless communication device utilizes a signal constellation for quadrature modulating a signal for transmission or quadrature demodulating a received signal. The signal constellation includes multiple constellation symbols and associated bit sequences, which can be translated there between. Specific signal constellations are disclosed.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: August 24, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Guido Montorsi, Sergio Benedetto, Yan Xin, Min Yan, Wei Lin
  • Patent number: 11070311
    Abstract: Disclosed are systems, methods, and non-transitory computer-readable storage media for monitoring application health via correctable errors. The method includes identifying, by a network device, a network packet associated with an application and detecting an error associated with the network packet. In response to detecting the error, the network device increments a counter associated with the application, determines an application score based at least in part on the counter, and telemeters the application score to a controller. The controller can generate a graphical interface based at least in part on the application score and a timestamp associated with the application score, wherein the graphical interface depicts a trend in correctable errors experienced by the application over a network.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: July 20, 2021
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Keerthi Manjunathan Swarnamanjunathan, Chih-Tsung Huang, Kelvin Chan, Wei-Jen Huang
  • Patent number: 11063691
    Abstract: A radio node in a wireless communication system employs multiple different candidate formats that define different possible positions of decoding checks within a transport block of a specific size. The radio node determines, from these different candidate formats, a format that defines a position of decoding checks within a transport block to be encoded or decoded. The radio node then encodes or decodes at least a portion of the transport block based on the determined format.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: July 13, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Jonas Fröberg Olsson, Svante Bergman, Erik Eriksson, Päl Frenger, Martin Hessler
  • Patent number: 11063695
    Abstract: The invention relates to an apparatus for selecting candidates in a K-Best algorithm of a MIMO decoder. The K-Best algorithm uses a layered structure comprising a first layer and subsequent layers. In each subsequent layer 2L candidates are selected by iteratively carrying out a selection step, wherein in the selection step the apparatus is configured to calculate and select at least two candidates having minimum distance values of a candidate group, and after each iteratively carried out selection step, the selected at least two candidates are sent to a further subsequent layer for iteratively generating a further candidate group of 2L candidates in the further subsequent layer.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: July 13, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yaron Ben-Arie, Chun Hang Lee, Genadiy Tsodik, Shimon Shilo, Doron Ezri
  • Patent number: 11038538
    Abstract: The present invention is directed to data communication. More specifically, an embodiment of the present invention provides an error correction system. Input data signals are processed by a feedforward equalization module and a decision feedback back equalization module. Decisions generated by the decision feedback equalization module are processed by an error detection module, which determines error events associated with the decisions. The error detection module implements a reduced state trellis path. There are other embodiments as well.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: June 15, 2021
    Assignee: INPHI CORPORATION
    Inventors: Jamal Riani, Farshid Rafiee Rad, Benjamin P. Smith, Yu Liao, Sudeep Bhoja
  • Patent number: 11025463
    Abstract: A first network node (NN) and a method therein for generation and transmission of a Binary Phase Shift Keying (BPSK) signal to a second NN. The first and second NNs are operating in a communications network. The first NN generates a third bit stream x(n) from a first bit stream d(n) of data for transmission, wherein each output bit comprised in the third bit stream depends on a transition in bit values between two input bits from the first bit stream. Further, the first NN generates a fourth bit stream y(n) from the third bit stream by expanding the third bit stream by a predetermined factor M. By means of a CPM signal generating module, the first NN generates a BPSK signal based on the fourth bit stream. Furthermore, the first NN transmits the BPSK signal to an OFDM signal receiving module of the second NN.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: June 1, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Miguel Lopez, Leif Wilhelmsson
  • Patent number: 11016681
    Abstract: An apparatus may include a circuit configured to receive an input signal at an input and process the input signal using a set of channel parameters. The circuit may further determine an error metric for the processing of the input signal using the set of channel parameters, compare the error metric to a plurality of thresholds, and when the error metric matches one of the plurality of thresholds, adapt, using an adaptation algorithm, the set of channel parameters to produce an updated set of channel parameters for use by the circuit as the set of channel parameters in subsequent processing of the input signal, the adaptation of the set of channel parameters being based on a weight corresponding to the matching threshold of the plurality of thresholds.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: May 25, 2021
    Assignee: Seagate Technology LLC
    Inventors: Marcus Marrow, Jason Bellorado, Vincent Brendan Ashe, Zheng Wu
  • Patent number: 10969518
    Abstract: An aspect includes aggregating a plurality of disparate datasets into a document store with semi-structured attributes, with each document in the document store specifying a geospatial location and a value of an environmental parameter at the geospatial location. The document store includes a plurality of documents specifying a plurality of different geo spatial locations and different environmental parameters, and the environmental parameters include a climatological parameter. Niche model layers are generated for the different environmental parameters at the geospatial locations. The niche models include a model layer for each of the different environmental parameters. A future geospatial location of a species is predicted based on environmental attributes of the species and contents of the niche model layers. The predicted future geospatial location of the species overlaid on a geographic map is output to a requestor.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: April 6, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Eli M. Dow, Matthew M. Klawonn, Harry R. Kolar
  • Patent number: 10958314
    Abstract: A wireless cellular base station (BS) transmitter transmits a downlink calibration pilot symbol. A receiver receives from a user equipment (UE) an uplink calibration pilot symbol and an effective downlink channel estimate transmitted by the UE. The effective downlink channel estimate is computed by the UE using the downlink calibration pilot symbol received from the BS. Processing devices compute an effective uplink channel estimate using the uplink calibration pilot symbol received from the UE and compute channel reciprocity calibration coefficients using the effective downlink channel estimate received from the UE and the effective uplink channel estimate computed by the BS. The BS includes multiple antennas, and the BS computes the channel reciprocity calibration coefficients for each antenna. Alternatively, the uplink channel estimate received by the BS is an inverted version of the effective downlink channel estimate, which the processing devices use for channel reciprocity compensation.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: March 23, 2021
    Assignee: National Instruments Corporation
    Inventors: Nikhil U. Kundargi, Karl F. Nieman, Junmo Sung
  • Patent number: 10958498
    Abstract: A coding and modulation apparatus and method are presented. The apparatus (10) comprises an encoder (11) that encodes input data into cell words, and a modulator (12) that modulates said cell words into constellation values of a non-uniform constellation. The modulator (12) is configured to use, based on the total number M of constellation points of the constellation and the signal-to-noise ratio SNR in dB, a non-uniform constellation from a group of constellations comprising one or more of predetermined constellations defined by the constellation position vector w0 . . . b?1, wherein b=M/4.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: March 23, 2021
    Assignee: SATURN LICENSING LLC
    Inventors: Lothar Stadelmeier, Nabil Sven Loghin, Jan Zoellner
  • Patent number: 10951261
    Abstract: A method for pseudo channel hopping in a node of a wireless mesh network is provided that includes scanning each channel of a plurality of channels used for packet transmission by the node, wherein each channel is scanned for a scan dwell time associated with the channel, updating statistics for each channel based on packets received by the node during the scanning of the channel, and selecting a channel of the plurality of channels for scanning based on the statistics when the scan dwell time of a currently scanned channel ends.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: March 16, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Kaichien Tsai, Arvind Kandhalu Raghu, Ramanuja Vedantham
  • Patent number: 10932233
    Abstract: A method for monitoring a downlink control channel, the method performed by a user equipment (UE) configured with multiple carriers includes determining whether to monitor the downlink control channel within either one UE-specific search space or a plurality of UE-specific search spaces, and monitoring the downlink control channel within the plurality of UE-specific search spaces if carrier index is configured, wherein each of the plurality of the UE-specific search spaces is determined based on the carrier index.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: February 23, 2021
    Assignee: LG Electronics Inc.
    Inventors: So Yeon Kim, Sung Ho Moon, Jae Hoon Chung, Yeong Hyeon Kwon, Han Gyu Cho
  • Patent number: 10931360
    Abstract: A method and system for selecting a symbol detector are herein provided. A method includes extracting a first set of features for a k-th resource element (RE), where k is an integer greater than one, extracting a second set of features from a first RE to a (k?1)th RE, and selecting a symbol detector for the k-th RE using a reinforcement learning (RL) neural network based on the extracted first set of features and the extracted second set of features.
    Type: Grant
    Filed: January 23, 2020
    Date of Patent: February 23, 2021
    Inventors: Hyukjoon Kwon, Kee-Bong Song
  • Patent number: 10931313
    Abstract: A bit interleaving method involves applying a bit permutation process to a QC LDPC codeword made up of N cyclic blocks each including Q bits, and dividing the codeword, after the bit permutation process, into a plurality of constellation words each made up of M bits, the codeword being divided into N/M sections, each constellation word being associated with one of the N/M sections, and the bit permutation process being performed such that each of the constellation words includes one bit from each of M different cyclic blocks associated with a given section.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: February 23, 2021
    Assignee: PANASONIC CORPORATION
    Inventor: Mihail Petrov
  • Patent number: 10911513
    Abstract: In various embodiments, a hindsight application computes a hindsight metric value for evaluation of a video rate selection algorithm. The hindsight application determines a first encoding option associated with a source chunk of a media title based on a network throughput trace and a buffer trellis. The hindsight application determines that the first encoding option is associated with a buffered duration range. The buffered duration range is also associated with a second encoding option that is stored in the buffer trellis. After determining that the first encoding option is associated with a higher visual quality than the second encoding option, the hindsight application stores the first encoding option instead of the second encoding option in the buffer trellis to generate a modified buffer trellis. Finally, the hindsight application computes a hindsight metric value associated with a sequence of encoded chunks of the media title based on the modified buffer trellis.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: February 2, 2021
    Assignee: NETFLIX, INC.
    Inventors: Zhi Li, Te-Yuan Huang
  • Patent number: 10877482
    Abstract: A trajectory setting device that sets a trajectory of a host vehicle includes a first path generation unit configured to generate a first path by assuming all obstacles around the host vehicle to be stationary obstacles, a second path generation unit configured to generate a second path when the moving obstacle is assumed to move independently, a third path generation unit configured to generate a third path when the moving obstacle is assumed to move while interacting with at least one of the other obstacles or the host vehicle, a reliability calculation unit configured to calculate reliability of the second path and reliability of the third path, and a trajectory setting unit configured to set the trajectory for traveling from the first path, the second path, and the third path based on the reliability of the second path and the reliability of the third path.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: December 29, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Toshiki Kindo
  • Patent number: 10879992
    Abstract: A receiver for receiving a signal including a plurality of symbols through a multiple input multiple output (MIMO) channel, and an operation method of the receiver are provided. The receiver includes a demodulator configured to calculate, for each physical channel, Euclidean distances of one or more of the received symbols with respect to all candidate vectors included in an initial candidate vector set and to output information about the Euclidean distances. A vector set detector may select, based on the information, one of a plurality of candidate vector sets having different sizes, as a subsequent candidate vector set for calculating a log likelihood ratio (LLR) of other symbols of the plurality of symbols or an LLR with respect to a second signal received following the first signal.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: December 29, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Young-seok Jung, In-hyoung Kim, Joo-yeol Yang
  • Patent number: 10872013
    Abstract: There is provided a method of providing adjusted LLR values of a plurality of bits in a codeword to an LDPC decoder, the plurality of bits representing a plurality of charge states of a plurality of memory cells of a non-volatile memory. The method comprises storing in a non-volatile memory controller associated with the non-volatile memory LLR values of the plurality of bits. The controller then determines a plurality of levels of the charge states represented by the plurality of bits. The controller then generates, by a distribution processor, distributions of a population of the plurality of bits in the codeword at each of the plurality of levels at a first and a second time after the first time. The controller then generates the adjusted LLR values based on a comparison between the first and second distributions, and then decodes the codeword according to the adjusted LLR values.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: December 22, 2020
    Assignee: Toshiba Memory Corporation
    Inventors: David Symons, Paul Hanham, Francesco Giorgio
  • Patent number: 10863348
    Abstract: A system and method for secure communications is disclosed which includes a processor(s) of a first appliqué spreading an uplink signal of a user from user equipment, where the first appliqué is coupled to the user equipment, and where the user equipment is connected to a mobile network. The processor(s) frequency shifts the spread uplink signal to maintain orthogonality over the mobile network.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: December 8, 2020
    Assignee: Perspecta Labs Inc.
    Inventors: Joseph C. Liberti, William H. Johnson
  • Patent number: 10856263
    Abstract: In order to improve the selection of search space candidates for a downlink control channel, an apparatus determines a set of decoding candidates of a lower aggregation level for a downlink control channel based on a random selection from a plurality of potential decoding candidates, wherein the plurality of potential decoding candidates are defined from a second set of decoding candidates of a higher aggregation level. The apparatus then attempts to decode the downlink control channel based on determined sets of decoding candidates of different aggregation levels. The downlink control channel may comprise a PDCCH.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: December 1, 2020
    Assignee: Qualcomm Incorporated
    Inventors: Jing Sun, Heechoon Lee, Wanshi Chen
  • Patent number: 10855398
    Abstract: A coding and modulation apparatus and method are presented, particularly for use in a system according to IEEE 802.11. The apparatus comprises an encoder configured to encode input data into cell words according to a low density parity check code, LDPC, and a modulator configured to modulate said cell words into constellation values of a non-uniform constellation and to assign bit combinations to constellation values of the used non-uniform constellation, wherein said modulator is configured to use, based on the total number N of constellation points of the constellation and the code rate R, a particular non-uniform constellation, which has been optimized using the peak-to-average power ratio (PAPR).
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: December 1, 2020
    Assignee: SONY CORPORATION
    Inventors: Thomas Handte, Daniel Schneider, Nabil Sven Loghin, Ben Eitel
  • Patent number: 10834632
    Abstract: Facilitating energy-efficient wireless communications for advanced networks (e.g., 4G, 5G, and beyond) with low-resolution digital-to-analog converters is provided herein. Operations of a system can comprise determining first values. Respective values of the first values can be digital samples of transmission and reception chains determined based on symbols transformed from bits. The operations can also comprise facilitating a quantization of the first values resulting in second values. Facilitating the quantization can be based on a cost function associated with processing the first values. Further, the operations can comprise outputting the second values as a continuous time signal over antennas of a base station device. The second values can comprise fewer values than the first values.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: November 10, 2020
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Ralf Bendlin, Arunabha Ghosh, Aditya Chopra
  • Patent number: 10826581
    Abstract: A machine-learning based multiple-input, multiple-output (MIMO) demapper for a wireless device may include a classifier that selects which MIMO demapper to use for a sample for a particular tone. For example, a wireless device may receive via a plurality of antennas a plurality of signals including a plurality of tones. The wireless device may determine selection features for each tone of the plurality of tones. The wireless device may select, for each tone, by the classifier based on the selection features, a selected demapper from at least a first MIMO demapper and a second MIMO demapper. The second MIMO demapper may have a different performance characteristic than the first MIMO demapper. The wireless device may detect, for each tone, one or more streams using the selected demapper for the tone. A stream may refer to a sequence of bits.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: November 3, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Parham Noorzad, Siddhartha Mallik, Taesang Yoo
  • Patent number: 10819468
    Abstract: Apparatuses, systems, and methods are disclosed for stochastic linear detection. A digital signal processor determines information about a plurality of transmitted signals based on a plurality of received signals. An initialization module determines an estimator matrix and a noise shaping matrix based on channel state information that relates the transmitted signals to the received signals. A sample generation module stochastically generates a plurality of signal estimates so that each signal estimate is a sum of a fixed component and a random component. The fixed component may be based on applying the estimator matrix to a vector of the received signals, and the random component may be based on applying the noise shaping matrix to generated noise. An output module sends soft information to an error-correcting code (ECC) decoder for decoding bits carried by the transmitted signals. The soft information may be based on the plurality of signal estimates.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: October 27, 2020
    Inventors: Ahmad Rezazadehreyhani, Jonathan C. Hedstrom, Chung Him Yuen, Kohl Riekhof, Daryl Wasden, Behrouz Farhang
  • Patent number: 10778397
    Abstract: The present disclosure relates to the field of communication technology, and provides a control signaling transmission method, a control signaling reception method, a network device and a reception device. The control signaling transmission method includes steps of: acquiring a control instruction for processing a first signal, the first signal carrying a signal for which a reception device is not a target reception device; and transmitting the control instruction to the reception device, the control instruction configured to control the reception device to or not to process the first signal.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: September 15, 2020
    Assignee: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY
    Inventors: Runhua Chen, Qiuping Huang, Qiubin Gao
  • Patent number: 10764868
    Abstract: A method for monitoring a downlink control channel, is performed by a user equipment (UE) configured with multiple carriers and includes receiving information on carrier index, determining a plurality of UE-specific search spaces for monitoring the downlink control channel, and monitoring the downlink control channel within the plurality of UE-specific search spaces, wherein location of each of the plurality of the UE-specific search spaces is determined based on the carrier index.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: September 1, 2020
    Assignee: LG Electronics Inc.
    Inventors: So Yeon Kim, Sung Ho Moon, Jae Hoon Chung, Yeong Hyeon Kwon, Han Gyu Cho
  • Patent number: 10749550
    Abstract: A likelihood generation device is included in a receiving apparatus that receives a code-modulated signal including n?k information bits and k parity bits in N-dimensional arrangement, where N is a natural number greater than or equal to four, and n and k are natural numbers with k<n. The likelihood generation device includes: a temporary likelihood determination unit to determine, by using a table that includes an L-dimensional address space and stores a likelihood in each of the L-dimensional address spaces, likelihoods of an information bit and a parity bit that are transmitted by the code-modulated signal received, where L is a natural number with L<N; and a likelihood correction unit to update, among the likelihoods determined by the likelihood derivation unit, the likelihood of the information bit on a basis of a rule for generation of the parity bit.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: August 18, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Tsuyoshi Yoshida, Keisuke Dohi, Keisuke Matsuda, Hiroshi Miura