Having Multi-receiver Or Interference Cancellation Patents (Class 375/144)
  • Patent number: 10848211
    Abstract: This disclosure relates to performing grouped MIMO communications in a cellular communication system. A cellular base station may select a precoding matrix for transmitting a downlink signal to a wireless device via a MIMO channel. The selected precoding matrix may have unequal weights for different MIMO subchannels. The downlink signal may be precoded using the selected precoding matrix. The precoded downlink signal may be transmitted to the wireless device via the MIMO channel. The wireless device may receive and decode the downlink signal.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: November 24, 2020
    Assignee: Apple Inc.
    Inventors: Sai Sravan Bharadwaj Karri, Swaminathan Balakrishnan, Tarik Tabet
  • Patent number: 10834706
    Abstract: An arrangement is disclosed where in a multi-carrier communication system, the modulation scheme, coding attributes, training pilots, and signal power may be adjusted to adapt to channel conditions in order to maximize the overall system capacity and spectral efficiency without wasting radio resources or compromising error probability performance, etc.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: November 10, 2020
    Assignee: NEO WIRELESS LLC
    Inventors: Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang
  • Patent number: 10804945
    Abstract: The present disclosure describes apparatuses and methods for dynamic interference cancellation in wireless receivers. In some aspects, a signal vector transmitted through a wireless environment is received via multiple antennas of a receiver, the signal vector affected by interfering signals in the wireless environment. The receiver determines an interference channel matrix for the signal vector based on the interference received with the signal vector and selects, from the interference channel matrix, columns of the interference channel matrix to form a noise-cancelling equalization matrix. The receiver then equalizes the signal vector with the noise-cancelling equalization matrix to remove a portion of interference from the signal vector to provide noise-cancelled equalized values of the signal vector for decoding. By so doing, the receiver may reduce effects of interference of the wireless environment (e.g.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: October 13, 2020
    Assignee: NXP USA, Inc.
    Inventors: B Hari Ram, Lokesh Sundaramurthy Satrasala, Sudhir Srinivasa, Hongyuan Zhang
  • Patent number: 10715288
    Abstract: An access point (AP) in a wireless local area network (WLAN) uses a protocol to determine frequency/time resource allocations of resource units (RUs) in parallel with data transfer to and from WLAN stations (STAs). The AP generates a sounding table associating STAs with RUs for uplink (UL) and downlink (DL). The AP processes the sounding table to create a channel map table and then the AP allocates particular RUs to particular STAs. The STAs then receive and transmit data from and to the AP over the allocated RUs. This approach achieves good throughput while reducing the use of signaling and pilot overhead associated with channel sounding. To avoid interruption of ongoing transmissions, a newly arriving STA is grouped and sounded with other STAs. The protocol includes a joint sounding and data epoch followed by a determination of the channel map table.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: July 14, 2020
    Assignee: Apple Inc.
    Inventors: Oren Shani, Guoqing Li, Joonsuk Kim, Ashok Ranganath
  • Patent number: 10708888
    Abstract: The present disclosure discloses an uplink detection method and device in a NOMA system. The method includes: performing pilot activation detection on each terminal in a first terminal set corresponding to a NOMA transmission unit block repeatedly until a detection end condition is met, wherein the first terminal set includes terminals that may transmit uplink data on the NOMA transmission unit block; performing channel estimation on each terminal in a second terminal set that determined through the pilot activation detection within each repetition period, wherein the second terminal set includes terminals that have actually transmitted uplink data on the NOMA transmission unit block; and detecting and decoding a data channel of each terminal in the second terminal set within each repetition period.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: July 7, 2020
    Assignee: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY
    Inventors: Bin Ren, Shaoli Kang, Hao Liu, Yang Song, Qiubin Gao
  • Patent number: 10701697
    Abstract: A technique for controlling and using a reference signal for a radio link between a base station and a radio device is described. As to a method aspect of the technique, a control message indicative of a scrambling identifier selector for selecting a scrambling identifier associated with the radio link is transmitted to the radio device. The transmitted scrambling identifier selector depends on a time index and a link identifier associated with the radio link. Over the radio link, the reference signal is transmitted to or received from the radio device at a time according to the time index. The reference signal is based on a pseudo-random binary sequence, which is generated using a seed value depending on the time index, the scrambling identifier selector and the scrambling identifier selected according to the scrambling identifier selector.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: June 30, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Karl Werner, Lars Lindbom
  • Patent number: 10694454
    Abstract: An improved technique for encoding and decoding of data for group common control channels is provided herein. Generally, the embodiments disclosed herein involve masking the information bits of the group common PDCCH (or group common control channel information) with the common RNTI, without using parity bits, which reduces the power requirements of the transmitter and receiver. In a first embodiment, the information block and the common RNTI can each be encoded using separate encoders, and then the encoded information block can be masked with the encoded common RNTI, and the resulting code symbol can be transmitted to the group of mobile devices. In a second embodiment, an information block can be appended with bits to match a size of the common RNTI, and then be masked by the common RNTI.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: June 23, 2020
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: SaiRamesh Nammi, Arunabha Ghosh, Salam Akoum
  • Patent number: 10659176
    Abstract: A method for identifying a radio frequency transmitter is described, wherein a radio frequency signal is received via a radio frequency channel, the radio frequency signal including at least one radio frequency sequence. The sequence received is split into a plurality of chunks. The radio frequency channel is equalized by using a first subset of the plurality of chunks. The amplitude of each chunk of a second subset of the plurality of chunks is measured in the equalized radio frequency channel. The at least one amplitude is used for deciding whether the at least one sequence of the radio frequency signal corresponds to a sequence listed in a list. Further, a system for identifying a radio frequency transmitter is described.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: May 19, 2020
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventor: Otmar Wanierke
  • Patent number: 10652901
    Abstract: Aspects of the subject disclosure may include, for example, obtaining a schedule of spectral segments in a communication link of a communication system. Signal interference is identified in a portion of a number of spectral segments according to the schedule of spectral segments and at least one threshold for detecting interference. A determination is made that a number of signal interferers in the portion of the number of spectral segments exceeds a number of filters and, responsive to the number of signal interferers exceeding the number of filters, use of the number of filters is prioritized to filter signal interference in the portion of the number of spectral segments for suppressing at least a portion of the signal interference detected.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: May 12, 2020
    Assignee: ISCO International, LLC
    Inventors: Mikhail Galeev, Amr Abdelmonem, Dariusz Seskiewicz, Zhigang Wang
  • Patent number: 10637508
    Abstract: Systems and methods provide for one or more server computers communicatively coupled to a network and configured to: generate a code construction for a file, including layers, each at a different code rate; calculate optimized code parameters, including storage efficiency, error-correction capability parameters, and constraints on error patterns; use the plurality of layers and optimized parameters to encode the file on a physical storage media; detect an error on the physical storage media; identify an error location within a first layer encoded at a first code rate; mark the error location as an erasure; and identify the erasure and a second error location for a second error location within a second layer, higher than the first layer, encoded at a second code rate.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: April 28, 2020
    Assignee: BOARD OF TRUSTEES OF MICHIGAN STATE UNIVERSITY
    Inventors: Jian Ren, Jian Li, Tongtong Li
  • Patent number: 10554328
    Abstract: Embodiments of the present invention provide a data transmission method and apparatus. The method includes: determining a contention transmission unit CTU to be used by to-be-sent uplink data, where the CTU is a transmission resource including at least a time domain resource, a frequency domain resource, and a code domain resource; encoding the to-be-sent uplink data by using N different code element groups in the code domain resource corresponding to the determined CTU, to obtain N groups of encoded data, where N is a positive integer greater than or equal to 2; and sending the N groups of encoded data by using the time domain and frequency domain resources that are corresponding to the determined CTU. According to the embodiments of the present invention, data reception reliability at a receive end can be improved.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: February 4, 2020
    Assignee: Huawei Techonologies Co., Ltd.
    Inventors: Xiuqiang Xu, Yalin Liu, Yan Chen
  • Patent number: 10547486
    Abstract: A data transmission method and apparatus are provided. The method includes: modulating, based on a codebook, every N information bits of to-be-transmitted data into one M-dimensional modulation symbol, where the codebook is generated based on an M-dimensional modulation constellation, the M-dimensional modulation constellation includes M modulation constellations, a constellation point in an mth modulation constellation in the M modulation constellations is obtained by mapping N information bits based on an mth information bit subset, the mth information bit subset includes information bits on some locations in the N information bits, and a union set of M information bit subsets respectively corresponding to the M modulation constellations is the N information bits, where M and N are integers greater than or equal to 2, and m is 1, 2, . . . , or M; and sending the generated M-dimensional modulation symbol. The technical solutions can reduce complexity when a modulation signal is demodulated.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: January 28, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Meng Cheng, Yiqun Wu, Yan Chen
  • Patent number: 10547427
    Abstract: According to an aspect of the present invention, a method for transmitting a Demodulation Reference Signal (DMRS) performed by a terminal in a wireless communication system that supports a Narrow Band (NB)-Internet of Things (IoT) includes generating a DMRS sequence by considering a single subcarrier transmission or a multiple subcarrier transmission; mapping the generated DMRS sequence to one or more symbols in time domain; and transmitting the DMRS to a base station through the mapped symbols, where each element of the generated DMRS sequence is sequentially mapped to each symbol of M symbols, when the DMRS is transmitted through the single subcarrier, and where the generated DMRS sequence is mapped to N symbols, when the DMRS is transmitted through the multiple subcarriers.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: January 28, 2020
    Assignee: LG ELECTRONICS INC.
    Inventors: Seunggye Hwang, Yunjung Yi, Kijun Kim
  • Patent number: 10512076
    Abstract: A method of transmitting a signal by a base station in a beam forming-based communication system is provided. The method includes: transmitting the signal using a transmission beam having at least one of a beam width and a transmission period in reverse proportion to one of a distance between a position of a transmission target region of the transmission beam for transmitting the signal within a service coverage of the base station and the base station and a size or area of the transmission target region.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: December 17, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jung-Soo Jung
  • Patent number: 10506595
    Abstract: Aspects of the present disclosure relate to methods and apparatus for allocating (or assigning) channels to different groups of wireless nodes in the case of co-channel coexistence between the different groups and interference to one or more other wireless nodes. One example method generally includes evaluating, for different assignments of channels to different groups of wireless devices that share bandwidth, an amount of transmission limitation imposed due to higher-tier protection, and assigning one or more of the channels to each of the groups, based on the evaluation.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: December 10, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Mostafa Khoshnevisan, Farhad Meshkati, Satashu Goel, Damanjit Singh, Vinay Joseph
  • Patent number: 10479019
    Abstract: A method of forming a textured effect on a substrate, the method comprising steps of: (a) creating a data file of an image having a thickness to be formed as the textured effect on the substrate, the data file comprising print image(s) and a number of times specified for printing of the print image(s); (b) preparing the data file for surface deposition by a printer; (c) providing the substrate on the printer; (d) the printer printing the print image(s) in the data file on the substrate using a layer of clear ink; (e) the printer UV curing the layer of ink; (f) repeating steps (d) and (e) for every print image of the print image(s) for the number of times specified in the data file such that the image formed as the textured effect on the substrate comprises a plurality of layers of printed and UV cured clear ink.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: November 19, 2019
    Assignee: NEOLT ASIA PTE LTD
    Inventor: Kok Leong Cheah
  • Patent number: 10476709
    Abstract: A radio receiver is disclosed, comprising: a receiving stage configured to receive a multi-layered signal comprising a plurality of layers; a division stage configured to divide the plurality of layers into a first subset and a second subset; a first whitening filter configured to filter the multi-layered signal based on a noise and interference covariance measure derived from the second subset to provide a first filtered multi-layered signal; and a first detection stage configured to detect at least one layer of the first subset based on the first filtered multi-layered signal.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: November 12, 2019
    Assignee: Intel IP Corporation
    Inventors: Michael Horvat, Tobias Kurpjuhn, Christoph Jans, Xiaofeng Wu
  • Patent number: 10425880
    Abstract: An on-board method for the end-to-end transparent transport of data packets is implemented by a telecommunications system comprising a first, sending station, a second, receiving station, a first, sending satellite, connected directly to the first station, and a second, receiving satellite, connected directly to the second station, the first satellite and second satellite being interconnected via a spaceborne network. The transport method comprises steps allowing an end-to-end transparent adaptive control loop for the adaptive control of the modulation and of the coding of the access links between the first station and the first satellite and between the second station and the second satellite to be implemented.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: September 24, 2019
    Assignee: THALES
    Inventors: Cédric Baudoin, Nicolas Chuberre, Mathieu Dervin
  • Patent number: 10404298
    Abstract: Indication of an amount of processing performed in detection and removal of ingress noise may be provided. A frequency domain representation of a narrowband region of a digital input signal may be received. The received frequency domain representation of the narrowband region may be compared with a predetermined threshold. Results from the comparison of the received frequency domain representation of the narrowband region with the predetermined threshold may be aggregated. Based on the aggregated results, an indication of an amount of processing performed by an ingress exciser in removing the ingress noise may be provided.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: September 3, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Richard Meller, Glendon L. Akins, III, Denis Downey, James An, Koen Van Renterghem
  • Patent number: 10389424
    Abstract: A method for adapting a beam shape of a beam in a wireless communication system having multiple nodes is disclosed. Each node is provided with an antenna system configured to provide radio coverage in a cell by a cell specific beam. The method comprises: calculating a transmit weight vector for each user to be served by a given cell based on information of spatial channel characteristics for the user to be served by the given cell and long term interference characteristics estimated based on aggregated information of spatial channel characteristics for users that the given cell should avoid interfering with and that are served by other cells; performing phase normalization of the calculated transmit weight vectors; and aggregating all transmit weight vectors to establish a common transmit weight vector used to form the beam shape for the cell specific beam.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: August 20, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Niklas Jaldén, Henrik Asplund, David Astely, Martin Johansson
  • Patent number: 10342003
    Abstract: To enable low latency uplink to be used in a more preferable mode can be provided. A device includes: a communication unit configured to perform radio communication; and a control unit configured to perform control such that control information is transmitted from the communication unit to a terminal, the control information indicating that a communication scheme in which data non-orthogonally multiplexed for a plurality of layers is demodulated through cancellation of interference between the layers and in which the data is transmitted from the terminal to a base station through a predetermined uplink resource, is available.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: July 2, 2019
    Assignee: SONY CORPORATION
    Inventor: Atsushi Yoshizawa
  • Patent number: 10313174
    Abstract: The present disclosure provides a method for interference cancellation which includes: calculating a mean value and a variance value of a received signal to obtain statistics information of the received signal; calculating an estimating log-likelihood ratio using the statistics information of the received signal; calculating a decoding log-likelihood ratios of the received signal using the estimating log-likelihood ratio of the received signal, and performing calculations to update the statistics information of the received signal; repeating the above steps for a pre-determined number of times, performing hard decisions on the decoding log-likelihood ratios of the received signal, and outputting data bits obtained from the hard decision. The present disclosure also provides an apparatus, an auxiliary method, a base station and a terminal device for interference cancellation.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: June 4, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dalin Zhu, Bin Yu, Pengfei Sun
  • Patent number: 10263660
    Abstract: Disclosed are methods and apparatus used in wireless communications. The methods and apparatus establish a codebook for use in sparse code multiple access (SCMA) encoded communications, in particular. The SCMA codebook is configured to set the codebook for at least one layer (i.e., a user) to include a constellation of points having a first grouping of constellation points located at first radial distance from an origin in a complex plane and a second grouping of constellation points located at a second radial distance from the origin. This codebook arrangement provides increased gains at receivers by optimizing the constellation shape to improve the distance between constellation points (i.e., SCMA codebook performance), and in particular more robust performance when encountering amplitude and phase misalignment in uplink (UL) multiple access.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: April 16, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Haitong Sun, Naga Bhushan, Tingfang Ji
  • Patent number: 10264554
    Abstract: Disclosed are a method and a device for allocating wireless resources in bandwidths of different sizes in a wireless LAN. The method for allocating wireless resources in bandwidths of different sizes in a wireless LAN may comprise steps in which: an AP determines a first resource unit to be allocated to an STA in a first bandwidth; and the AP schedules the first resource unit for the STA, wherein the allocation starting position of the first resource unit allocated in the first bandwidth is configured the same as the allocation starting position of a second resource unit allocated in a second bandwidth, and the allocation starting position of a first guard tone adjacent to the first resource unit may be configured differently from the allocation starting position of a second guard tone adjacent to the second resource unit on the basis of tone shifting.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: April 16, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Jinsoo Choi, Hangyu Cho, Wookbong Lee
  • Patent number: 10250423
    Abstract: A modem apparatus is configured to provide wireless network access in accordance with an Orthogonal Frequency Division Multiplexing communications scheme. The apparatus comprises a hardware subsystem comprising baseband processing components (302) and Radio Frequency processing components (304). The baseband processing components (302) comprise a first converter component (314) arranged to convert between time and frequency domains in accordance with the Orthogonal Frequency Division Multiplexing communications scheme, and a second converter component (316) arranged to convert between parallel and serial data formats, the second converter (316) being operably coupled to the first converter (314). The Radio Frequency processing components (304) comprise a cyclic prefix processing component (318) responsive to control information.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: April 2, 2019
    Assignee: u-blox AG
    Inventors: Peter Mutitika Kibutu, Norman John Beamish
  • Patent number: 10211952
    Abstract: A method for receiving a signal by integer forcing in a wireless communication system is provided. The method includes receiving one or more signals through a plurality of antennas, filtering the received one or more signals using a forcing matrix, generating codewords by remapping the filtered one or more signals, acquiring a summed codeword by performing a modulo operation on the codewords, decoding the summed codeword, and acquiring original codewords by performing an inversion operation on the decoded summed codeword.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: February 19, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Min Jang, Sung-Ho Chae, Cheol Jeong
  • Patent number: 10211951
    Abstract: Embodiments of the present invention provide a decoding method and apparatus. The method includes: receiving K user signals by using N subcarriers, where one user signal is carried on at least two subcarriers of the N subcarriers, one subcarrier carries at least two user signals of the K user signals, and 2?N<K; determining, from the N subcarriers, at least two target subcarriers that carry a target user signal, and performing initialization calculation on the target subcarriers, to obtain initialization calculation results; and determining, in a logarithm domain, a probability of each codeword in a codebook of the target user signal according to the initialization calculation results, to decode the target user signal. According to this method, decoding can be performed in the logarithm domain with low complexity.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: February 19, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Gaoning He, Shunqing Zhang, Yan Chen
  • Patent number: 10200231
    Abstract: A communication system in which probabilistic signal shaping and FEC coding are jointly applied using a partial amplitude-shaping scheme, under which bit-words representing binary labels of the transmitted amplitudes may have (i) a fixed number of amplitude most-significant bits (MSBs) generated using a shaping code and (ii) a fixed number of amplitude least-significant bits (LSBs) generated using an FEC code, e.g., without the shaping code being applied thereto. In various embodiments, the transmitted constellation symbols can carry, as sign bits, some original information bits and/or the parity bits generated by FEC-encoding some combination of the MSBs, the LSBs, and said some original information bits. Some embodiments are compatible with convolutional FEC codes, such as the trellis-coded modulation. Some embodiments can be used in communication systems relying on discrete multi-tone modulation, such as the systems providing DSL access over subscriber lines.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: February 5, 2019
    Assignee: Nokia Technologies Oy
    Inventors: Yannick Lefevre, Joon Ho Cho
  • Patent number: 10097246
    Abstract: A control method for a communication network that has a transmitter with an array of transmit antennas and that has at least one receiver communicating with the transmitter. The receiver performs a channel measurement for a receive antenna of the receiver using a signal transmitted from the transmitter to the receiver. The receiver further determines channel coefficients for each of an array of transmit antennas at the transmitter from an output of the channel measurement, and then applies a linear, reversible and orthogonal transform to the channel coefficients, thus ascertaining channel component coefficients indicative of the individual weight of respective channel components in a transform domain. The receiver then selects one or more channel components in the transform domain and communicates to the transmitter a control signal indicative of one or more preferred channel components or a magnitude of one or more channel component coefficients, or both, in quantized form.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: October 9, 2018
    Assignee: Koninklijke Philips N.V.
    Inventors: Filippo Tosato, Timothy James Moulsley
  • Patent number: 10020967
    Abstract: A method includes receiving an n-level Pulse Amplitude Modulated (PAM-n) signal at a receiver from a transmitter via a channel. The method also includes determining one or more sampling times of the PAM-n signal. The method further includes determining one or more slicing levels of the PAM-n signal. The method also includes extracting and decomposing jitter in the PAM-n signal for each slicing level of the PAM-n signal to determine one or more jitter components. The method further includes extracting and decomposing noise in the PAM-n signal for each data level of the PAM-n signal to determine one or more noise components. The method also includes adjusting the receiver, the transmitter, the channel, or any combination thereof, based on the one or more jitter components, the one or more noise components, or both.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: July 10, 2018
    Assignee: Intel Corporation
    Inventors: Mike Peng Li, Hsinho Wu, Masashi Shimanouchi
  • Patent number: 9954719
    Abstract: Embodiments relate to a data transmission method. A relay node receives information that is about an SCMA codebook used by the relay node and that is sent by a destination node. The relay node receives two or more source signals sent by two or more source nodes. The relay node performs network coding on the received two or more source signals. The relay node performs SCMA codebook mapping on a signal obtained after the network coding, so as to obtain at least two modulation symbols. The relay node sends to the destination node, the at least two modulation symbols obtained after the SCMA mapping.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: April 24, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Lei Lu, Dai Shi, Wenting Guo
  • Patent number: 9831963
    Abstract: A MIMO communication method of performing MIMO communication between a base station having a plurality of antennas and each of a plurality of terminals covered by the base station using uplink data slots and downlink data slots that are alternately placed on a time axis. The method includes, in the base station, despreading a received signal that is transmitted from each of the plurality of terminals demodulating the transmission data transmitted from a respective terminal on the basis of the value of the estimated channel; decoding a received signal included in the uplink data slots, estimating a current channel between each of all antennas of the base station and the respective terminal; and comparing the stored value of the estimated channel with a value of the estimated current channel and updating the stored value of the estimated channel to the value of the estimated current channel.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: November 28, 2017
    Assignees: Sony Corporation, Sony Mobile Communications Inc.
    Inventors: Shigeo Kusunoki, Erik Bengtsson, Ying Zhinong
  • Patent number: 9813092
    Abstract: A signal processing method and apparatus are disclosed. The signal processing method includes: receiving, by a first signal processing apparatus, a mixed signal; acquiring, by the first signal processing apparatus, an energy strength ratio of the mixed signal, where the energy strength ratio includes a ratio of energy strength of a signal sent by a first signal source and received by the first signal processing apparatus to energy strength of a signal sent by a second signal source and received by the first signal processing apparatus; and if the energy strength ratio is less than a first preset threshold, using, by the first signal processing apparatus, the signal sent by the second signal source in the mixed signal as an interference signal and separating the interference signal, and determining that a mixed signal obtained after the separation processing is the desired signal sent by the first signal source.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: November 7, 2017
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Meng Cai, Kun Li, Hongli Jiang, Yu Liu
  • Patent number: 9798013
    Abstract: Method of detecting interference in a satellite radio-navigation signal, characterized in that it comprises the following steps: determining a first temporal position for which the correlation between the said signal and a local spreading code, offset by the said position, is maximum; determining a plurality of measurements of correlation between the said signal and a local spreading code offset by a plurality of secondary temporal positions, the said plurality of secondary temporal positions and the said first temporal position being regularly spaced; determining, for a plurality of correlation measurement pairs formed by two measurements at two consecutive temporal positions, the phase difference between the two correlation measurements of the said pair; calculating an item of information representative of the standard deviation of the said phase difference; and comparing the said item of information with a detection threshold configured at least as a function of the ratio of the powers of the signal and
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: October 24, 2017
    Assignee: Thales
    Inventors: Marc Revol, David Pietin
  • Patent number: 9788033
    Abstract: In one embodiment, a consumer device is assigned, at a broadcast headend to one of at least two groups of consumer devices, the two groups including a first group of consumer devices which is required to play content of a second type in order to view content of a first type and a second group of consumer devices which is not required to play content of the second type in order to view content of the first type. A video broadcast stream is sent from the broadcast headend to the consumer device, the video broadcast stream comprising content of the first type sent associated with a first packet ID (PID) and content of the second type sent associated with a second PID, wherein the first PID and the second PID are processed at the consumer device at the same time.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: October 10, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Harel Cain, Michal Devir, Yaron Sella
  • Patent number: 9774405
    Abstract: A system for frequency-isolated self-interference cancellation includes a transmit coupler, that samples an RF transmit signal to create a sampled RF transmit signal having a first RF carrier frequency, an RF self-interference canceller that transforms the sampled RF transmit signal to an RF self-interference cancellation signal, a receive coupler, that combines the RF self-interference cancellation signal with an RF receive signal to form a reduced-interference receive signal, and a frequency shifter.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: September 26, 2017
    Assignee: Kumu Networks, Inc.
    Inventors: Dinesh Bharadia, Jeffrey Mehlman, Wilhelm Steffen Hahn
  • Patent number: 9755869
    Abstract: A system and method use tunnelizing for analyzing frequency spectrum. The method may include the steps of under sampling an input signal to take samples in one or more tunnels each with a tunnel bandwidth that is equal to or less than a total analysis bandwidth of the input signal; detecting one or more cyclostationary features of the input signal based on the samples; and determining one or more signal types of the one or more cyclostationary features based on the one or more cyclostationary features.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: September 5, 2017
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Michael P. Anthony, Jack Chuang, Apurva N. Mody, Chad M. Spooner
  • Patent number: 9596669
    Abstract: A semiconductor device comprising interface logic for transmitting data bursts across an interface. The interface logic is arranged to transmit bursts of data across the interface such that the start of a burst of data is substantially aligned with a symbol interval (SI) boundary. The interface logic is further arranged to apply an offset to the SI boundary at the start of the burst of data.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: March 14, 2017
    Assignee: NXP USA, INC.
    Inventors: Paul Kelleher, Michael O'Brien, Conor O'Keeffe
  • Patent number: 9559871
    Abstract: A method and an apparatus for using a plurality of antennas to equalize a composite propagation channel of a wideband wireless communication is provided. The method comprises adjusting a corresponding weight associated with at least two of the plurality of antennas to obtain a channel response from the plurality of antennas over a composite propagation channel. The method further comprises equalizing the channel response of the composite propagation channel over a given bandwidth based on the corresponding weights for the wireless communication over a wideband frequency range. By adjusting a complex weight associated with each of the set of transmit antennas, a wireless communication system may obtain a channel response from the plurality of antennas over the composite propagation channel.
    Type: Grant
    Filed: January 10, 2006
    Date of Patent: January 31, 2017
    Assignee: Alcatel-Lucent USA Inc.
    Inventor: Dennis Raymond Morgan
  • Patent number: 9438377
    Abstract: A two-reference-point-pair determining unit 101 determines two reference point pairs by selecting two transmission symbol points with their LLR computation target bit being 0 and two transmission symbol points with their LLR computation target bit being 1. An LLR computation unit 113 assigns weights to the two LLRs calculated for the two reference point pairs, respectively, followed by adding them, and further adds to the addition result a correction term that may be zero sometimes, thus computing LLR for the two reference point pairs.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: September 6, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kenya Sugihara, Wataru Matsumoto
  • Patent number: 9432080
    Abstract: For each channel of a plurality of channels of a Vector transmission system, a sequence of cross-coupling test signals representing a sequence of complex numbers may be transmitted or received. And for each channel of the plurality of channels a sequence of the real part of the sequence of complex numbers is different to a sequence of the imaginary part of the sequence of complex numbers.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: August 30, 2016
    Assignee: Lantiq Deutschland GmbH
    Inventor: Heinrich Schenk
  • Patent number: 9432103
    Abstract: A cellular communication system comprises a Multiple-In Multiple-Out, MIMO, transmitter and receiver. The MIMO transmitter comprises a message generator for generating MIMO messages comprising selected training sequences and transceivers transmitting the messages on a plurality of antennas. The training sequences are selected by a midamble selector from a set of training sequences in response to an associated antenna on which the message is to be transmitted. The set of training sequences is associated with the cell of the MIMO transmitter and comprises disjoint subsets of training sequences for each of the plurality of antennas. The receiver comprises a transmit antenna detector which determines which antenna of the MIMO transmitter the message is transmitted from in response to the training sequence of the received message.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: August 30, 2016
    Assignee: SONY CORPORATION
    Inventors: Peter B. Darwood, Vishakan Ponnampalam, Alan Edward Jones
  • Patent number: 9391655
    Abstract: A digital filter for narrowband interference rejection, including modules of narrowband interference rejection connected in series, each of which includes the following elements connected in series: a block of successive vector rotation based on the CORDIC vector rotation algorithm for integers, a block of reduction of the length of the rotated vector to maintain the same number of bits for digital signal representation, a block of high-pass filters for orthogonal components of the reduced vector in order to remove the interference from zero frequency region. The filter can be implemented without multiplication.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: July 12, 2016
    Assignee: Topcon Positioning Systems, Inc.
    Inventors: Andrey V. Veitsel, Victor A. Prasolov, Dmitry D. Murzinov
  • Patent number: 9374140
    Abstract: A method of selecting antenna segments for transmission and/or reception in a MIMO wireless transmission system using sectorized directional antennas, includes the steps of selecting, from an initial set of ranked link antenna patterns, a link antenna pattern having the best average rank, at predetermined time intervals, successively selecting a subset of link antenna patterns having average ranks within a predetermined distance to the best average rank, determining an average link performance of the link antenna patterns selected in the preceding step, determining an average rank of the link antenna patterns, for which the average link performance has been determined in the preceding step, selecting the link antenna pattern having the best average rank, and repeating the process at the next predetermined time interval.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: June 21, 2016
    Assignee: Thomson Licensing
    Inventors: Theodoros Salonidis, Tae Hyun Kim, Henrik Lundgren
  • Patent number: 9350414
    Abstract: A digital filter for narrowband interference rejection, including modules of narrowband interference rejection connected in series, each of which includes the following elements connected in series: a block of successive vector rotation based on the CORDIC vector rotation algorithm for integers, a block of reduction of the length of the rotated vector to maintain the same number of bits for digital signal representation, a block of high-pass filters for orthogonal components of the reduced vector in order to remove the interference from zero frequency region. The filter can be implemented without multiplication.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: May 24, 2016
    Assignee: Topcon Positioning Systems, Inc.
    Inventors: Andrey V. Veitsel, Victor A. Prasolov, Dmitry D. Murzinov
  • Patent number: 9331716
    Abstract: The present inventions are related to systems and methods for data processing, and more particularly to systems and methods for data encoding.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: May 3, 2016
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Pavel A. Panteleev, Elyar E. Gasanov, Andre P. Sokolov, Yuri Shutkin, Dmitriy V. Alekseev
  • Patent number: 9307420
    Abstract: A method for noise rise estimation in a wireless communication system comprises measuring (210) of received total wideband power of an antenna a plurality of times. An estimate of a noise floor measure is computed (212) based on at least a number of the measured received total wideband powers of the antenna. Interference whitening of a received signal is performed (214) per user for a multitude of users. A useful signal power per user after the interference whitening, preferably Frequency Domain Equalization, is determined (216). A noise rise measure per user is calculated (220), based at least on the useful signal power per user and the noise floor measure. The calculation in turn comprises compensation of the noise rise measure per user for the effects of the interference whitening. An arrangement for noise rise estimation is adapted for such a method. A radio base station comprises such an arrangement.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: April 5, 2016
    Assignee: TELEFONAKTIEBOLAGET L M ERICSSON
    Inventors: Torbjörn Wigren, Henrik Egnell, Ari Kangas
  • Patent number: 9294163
    Abstract: An apparatus and a method for selecting a beam in a wireless communication system capable of forming a plurality of antenna beams are provided. The method for transmitting signals includes transmitting a training signal by using a plurality of first beams and a plurality of second beams, and transmitting at least one of user control information and data by using at least one fourth beam among a plurality of third beams.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: March 22, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Yung-Soo Kim
  • Patent number: 9246646
    Abstract: Method and apparatus for transmitting pilot on multiple antennas are disclosed. A wireless transmit/receive unit (WTRU) may transmit a primary dedicated physical control channel (DPCCH) and at least one secondary DPCCH via multiple antennas using different channelization codes. The first eight pilot symbols of the secondary DPCCH may be same as pilot symbols of length eight of the primary DPCCH. The secondary DPCCH may include a same number of pilot bits as the primary DPCCH in a normal mode and in a compressed mode, respectively. The transmit power of the secondary DPCCH may be adjusted based on a ratio of a number of pilot symbols in the primary DPCCH and the secondary DPCCH. When a required transmit power exceeds a maximum allowed transmit power of the WTRU, power scaling may be applied equally to the primary DPCCH and the secondary DPCCH.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: January 26, 2016
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Benoit Pelletier, Lujing Cai, Hong Zhang, Fengjun Xi, Joseph S. Levy
  • Patent number: RE47912
    Abstract: The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting control information through a PUCCH in a wireless communication system and an apparatus for same comprising the steps of: obtaining a plurality of second modulation symbol streams corresponding to a plurality of SC-FDMA (Single Carrier Frequency Division Multiplexing) symbols by diffusing a plurality of first modulation symbol streams to form the first modulation symbol streams corresponding to the SC-FDMA symbols within a first slot; obtaining a plurality of complex symbol streams by performing a DFT (Discrete Fourier Transform) pre-coding process for the plurality of second modulation symbol streams; and transmitting the plurality of complex symbol streams through the PUCCH wherein the plurality of second modulation symbol streams are scrambled in a SC-FDMA symbol level.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: March 17, 2020
    Assignee: LG ELECTRONICS INC.
    Inventors: Seung Hee Han, Sung Ho Moon, Jae Hoon Chung, Moon Il Lee, Yeong Hyeon Kwon