Plural Diversity Patents (Class 375/299)
  • Patent number: 11076350
    Abstract: Accordingly, systems and methods for managing power when the number of training and data tones are increased in a wireless communications system are provided. An L-SIG field is generated that includes a set of data and pilot tones, wherein the pilot tones are inserted between the data tones in the set of data and pilot tones. A plurality of training tones is added to the L-SIG field before and after the set of data and pilot tones. A symbol is generated that includes the L-SIG field, an L-LTF field, and a data field, wherein the training tones of the L-SIG field provide channel estimates for the data field. Power of the L-LTF field is managed relative to power of the L-SIG field in the generated symbol in a time domain.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: July 27, 2021
    Assignee: NXP USA, INC.
    Inventors: Hongyuan Zhang, Mingguang Xu, Yakun Sun
  • Patent number: 11063805
    Abstract: A signal generation method includes phase-changing baseband signals with respective phase changing patterns to generate respective phase-changed signals, each of the phase changing patterns being different from each other, and inverse-fast-Fourier-transforming the phase-changed signals to respective orthogonal frequency division multiplexing (OFDM) transmission signals. Each phase changing pattern has N candidates for an amount of change in a phase, N being an integer greater than two, and each candidate is periodically selected from the N candidates based on subcarriers of the respective OFDM transmission signals, a phase of the respective baseband signals being changed by the each candidate.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: July 13, 2021
    Assignee: SUN PATENT TRUST
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 11063797
    Abstract: A transmitter is arranged to transmit binary information using a binary amplitude shift keying where information symbols are represented by a signal including a first power state and a second power state. A duration of a bit includes a first part where the second power state is applied irrespective of which binary value being represented, and a second part where a binary value is represented by any of the first power and a third power state or a combination pattern of the first power state and the third power state. The first power state has a higher signal power than the second power state and the third power state. The duration of the second part is equal or less the duration of the first part and the signal power of the first power state is such that the binary values are distinguishably decodable.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: July 13, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Leif Wilhelmsson, Miguel Lopez, Dennis Sundman
  • Patent number: 11057255
    Abstract: The present specification relates to a method for transmitting and receiving signals in a wireless local area network (WLAN) system and an apparatus therefor, the method comprising the steps of: generating a training sub-field consisting of a certain number of orthogonal frequency division multiplexing (OFDM) symbols; and transmitting, to a second STA, a signal including a header field and the training sub-field, wherein the transmitted signal is repeatedly transmitted T times (where T is a natural number) on the basis of information indicated by the header field after a data field.
    Type: Grant
    Filed: April 9, 2020
    Date of Patent: July 6, 2021
    Assignee: LG ELECTRONICS INC.
    Inventors: Sunwoong Yun, Jinmin Kim, Sungjin Park, Jinsoo Choi
  • Patent number: 11044045
    Abstract: Disclosed herein are techniques to provide forward error correction for a high-speed interconnect symbol stream, such as, DisplayPort. The symbol stream may be split into FEC blocks and parity bits generated for each of the FEC blocks. The parity bits may be interleaved, encoded, and transmitted over an interconnect along with the symbol stream to provide forward error correction for the symbol stream.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: June 22, 2021
    Assignee: INTEL CORPORATION
    Inventors: Nausheen Ansari, Ziv Kabiry, Gal Yedidia
  • Patent number: 10985948
    Abstract: Noise and interference may be estimated at a user equipment (UE) in a system that may support transmissions having different transmission time intervals (TTIs). The UE may perform a channel estimation for a first set of transmissions having a first TTI based at least in part on an estimated interference from a second set of transmissions having a second TTI that is shorter than the first TTI. The UE may perform channel estimation for orthogonal frequency division multiplexing (OFDM) symbols of the first set of transmissions. The first set of transmissions may then be demodulated based at least in part on the channel estimation for the first set of transmissions. Noise and interference may also be estimated based on one or more null tones within one or more OFDM symbols of the allocated resources.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: April 20, 2021
    Assignee: QUALCOMM INCORPORATED
    Inventors: Seyedkianoush Hosseini, Wanshi Chen, Juan Montojo, Shimman Arvind Patel, Hao Xu
  • Patent number: 10985815
    Abstract: All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.
    Type: Grant
    Filed: January 31, 2020
    Date of Patent: April 20, 2021
    Assignee: SUN PATENT TRUST
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 10972163
    Abstract: A transmission method includes generating a first precoded signal and a second precoded signal by performing a precoding process on a first baseband signal and a second baseband signal, outputting a third signal by inserting a pilot signal into the first precoded signal, outputting a fourth signal by applying a first phase change to the second precoded signal, outputting a fifth signal by inserting a pilot signal into the fourth signal, and outputting a sixth signal by applying a second phase change to the fifth signal.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: April 6, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 10972243
    Abstract: Provided is a radio communication device which can separate propagation paths of antenna ports and improve a channel estimation accuracy even when using virtual antennas. The device includes: a mapping unit which maps a data signal after modulation to a virtual antenna and a virtual antenna; a phase inversion unit which inverts the phase of S0 transmitted from an antenna port in synchronization with a phase inversion unit between the odd-number slot and the even-number slot; the phase inversion unit which inverts the phase of R0 transmitted from the antenna port; a phase inversion unit which inverts the phase of S1 transmitted from an antenna port in synchronization with a phase inversion unit; and the phase inversion unit which inverts the phase of R1 transmitted from an antenna port.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: April 6, 2021
    Assignee: Sun Patent Trust
    Inventors: Seigo Nakao, Masayuki Hoshino, Atsushi Sumasu, Katsuhiko Hiramatsu
  • Patent number: 10958304
    Abstract: Methods, systems, and devices for wireless communications are described. A UE may use different modulation schemes, or different modulators, for a single data stream. The set of modulators may be based on a linear combination of a function of encoded bits to be transmitted. In some cases, the UE may use a different permutation or interleaving of the function of bits with the same linear function to generate a different set of modulators. The UE may use a combination of any one or more of the described techniques for generating a set of modulators. Different modulators may be cyclically repeated over time. The UE may apply a device-specific scrambling sequence and transmit the modulated symbols on an uplink channel. The base station may use matched filters and an element-wise estimator (ESE) to compute log-likelihood ratios (LLRs) for each bit of each UE in a received signal.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: March 23, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Seyong Park, Pinar Sen, Naga Bhushan, Tingfang Ji
  • Patent number: 10938529
    Abstract: Aspects directed towards sounding reference signal (SRS) antenna switching are disclosed. In one example, an SRS configuration is received from a network in which at least four antennas of a scheduled entity are configured based on the SRS configuration. Here, the SRS configuration configures at least one antenna to simultaneously support SRS antenna switching and an uplink (UL) multiple-input multiple-output (MIMO) communication. An SRS communication is then transmitted according to the SRS configuration. In another example, a transmission capability reporting is received from a scheduled entity comprising at least four antennas. A determination is then made of whether the scheduled entity may simultaneously support SRS antenna switching and an UL MIMO communication. An SRS configuration is then generated for the scheduled entity based on the determination in which a default SRS configuration configures at least one antenna to simultaneously support the SRS antenna switching and the UL MIMO communication.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: March 2, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Le Liu, Alberto Rico Alvarino, Peter Gaal, Alexandros Manolakos, Wanshi Chen
  • Patent number: 10931482
    Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present invention relates to a method and apparatus for channel estimation in a wireless communication system. A method for operating a transmitter comprises the operations of: transmitting a first reference signal through a first antenna; and transmitting a second reference signal through a second antenna, wherein the first reference signal includes a first Golay sequence, and the second reference signal includes a second Golay sequence.
    Type: Grant
    Filed: January 20, 2020
    Date of Patent: February 23, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jongho Oh, Soon Chan Kwon, Daehoon Kim, Taeyeong Kim, Jungmin Yoon
  • Patent number: 10914775
    Abstract: A measuring system for measuring properties of a device under test over the air comprises an antenna array, adapted to receive first measuring signals from the device under test, a measuring device adapted to process the first measuring signals received by the antenna array, and to generate second measuring signals and transmit them to the device under test, using the antenna array. The measuring device comprises a quiet zone generator, which is adapted to perform a beamforming of the first measuring signals after reception by the antenna array. It is preferably also adapted to perform a beamforming on the second measuring signals before transmission by the antenna array. The quiet zone generator is adapted to apply the beamforming, so that at least one adjustable quiet zone is achieved.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: February 9, 2021
    Assignee: ROHDE & SCHWARZ GMBH & CO. KG
    Inventors: Corbett Rowell, Adam Tankielun, Daniel Markert
  • Patent number: 10911975
    Abstract: The present invention discloses a method for a terminal reporting radio resource management (RRM) to a base station, and an apparatus supporting the same. More specifically, the present invention discloses a method for a terminal, if a base station transmits signals including an RRM reference signal (RS) by using one or more analogue beams for each symbol, performing RRM measurement in correspondence with the same, and reporting the measured RRM information; and an apparatus supporting the same.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: February 2, 2021
    Assignee: LG Electronics Inc.
    Inventors: Hanjun Park, Hyunsoo Ko, Eunsun Kim, Kijun Kim, Yunjung Yi, Hyunho Lee
  • Patent number: 10904039
    Abstract: Embodiments of the present disclosure relate to downlink/uplink data transmission in a wireless communication system. In an embodiment of the present disclosure, there is provided a method for downlink data transmission in a wireless communication system which comprises transmitting an indication for a new-type reference signal to a user equipment, wherein the new-type reference signal has an identical location in frequency domain to a legacy reference signal; and transmitting the new-type reference signal and the legacy reference signal to the user equipment for using in channel estimation. In a case of more than one antenna port, the new-type reference signal may be designed to have a different location in time domain from a legacy reference signal to avoid interference to other antenna ports.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: January 26, 2021
    Assignee: NEC (China) Co., Ltd.
    Inventors: Gang Wang, Zhennian Sun, Ming Lei
  • Patent number: 10892821
    Abstract: The present application discloses a method for a terminal to receive a downlink signal including at least one code word in a wireless communication system. Particularly, the method is characterized by: a step of receiving a first code word, through a first number of layers, and a second code word, through a second number of layers, which have been newly transmitted from a base station; a step of transmitting, to the base station, a negative acknowledgement for one of the first code word and the second code word; and receiving, from the base station, a code word which has been re-transmitted in response to the negative acknowledgement, and a third code word which has been newly transmitted, wherein the number of layers for receiving the re-transmitted code word is equal to the number of layers involved in the new transmission thereof.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: January 12, 2021
    Assignee: LG ELECTRONICS INC.
    Inventors: Hyungtae Kim, Kijun Kim, Jiwon Kang
  • Patent number: 10862609
    Abstract: In some embodiments of the invention, OFDM symbols are transmitted as a plurality of clusters. A cluster includes a plurality of OFDM sub-carriers in frequency, over a plurality of OFDM symbol durations in time. Each cluster includes data as well as pilot information as a reference signal for channel estimation. In some embodiments, a plurality of clusters collectively occupy the available sub-carrier set in the frequency domain that is used for transmission. In some embodiments of the invention data and/or pilots are spread within each cluster using code division multiplexing (CDM). In some embodiments pilots and data are separated by distributing data on a particular number of the plurality of OFDM symbol durations and pilots on a remainder of the OFDM symbol durations. CDM spreading can be performed in time and/or frequency directions.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: December 8, 2020
    Assignee: Apple Inc.
    Inventors: Jianglei Ma, Ming Jia, Wen Tong, Peiying Zhu, Hua Xu, Hang Zhang, Mo-Han Fong
  • Patent number: 10833801
    Abstract: There is provided a method of generating a space-time block code (STBC) for encoding a digital data sequence comprising a set of independent symbols to be transmitted through a transmission channel in a communication system, the space-time block code being represented by a set of linear dispersion matrices in a linear dispersion representation, each linear dispersion matrix comprising components having complex values, the method comprising, generating at least some of the linear dispersion matrices depending on component-wise conditions related to a set of selected pairs of the linear dispersion matrices, each pair comprising a first linear dispersion matrix and a second linear dispersion matrix, said component-wise conditions comprising a component-wise condition between the components of the first linear dispersion matrix and the components of the second linear dispersion matrix.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: November 10, 2020
    Assignee: INSTITUT MINES-TELECOM
    Inventors: Ghaya Rekaya-Ben Othman, Asma Mejri, Mohamed-Achraf Khsiba
  • Patent number: 10833770
    Abstract: Aspects of the present disclosure describe systems, methods and structures for optical fiber nonlinearity compensation using neural networks that advantageously employ machine learning (ML) algorithms for nonlinearity compensation (NLC) that advantageously provide a system-agnostic model independent of link parameters, and yet still achieve a similar or better performance at a lower complexity as compared with prior-art methods. Systems, methods, and structures according to aspects of the present disclosure include a data-driven model using the neural network (NN) to predict received signal nonlinearity without prior knowledge of the link parameters. Operationally, the NN is provided with intra-channel cross-phase modulation (IXPM) and intra-channel four-wave mixing (IFWM) triplets that advantageously provide a more direct pathway to underlying nonlinear interactions.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: November 10, 2020
    Assignee: NEC Corporation
    Inventors: Shaoliang Zhang, Fatih Yaman, Eduardo Rodriguez, Yoshihisa Inada, Kohei Nakamura, Takanori Inoue
  • Patent number: 10812131
    Abstract: In a physical broadcast channel sending/receiving method, after receiving two broadcast channel signals on two corresponding physical broadcast channels at two time-frequency resource locations, the terminal device determines that information other than an offset of a corresponding time-frequency resource location is the same in two pieces of broadcast information carried in the two broadcast channel signals, obtains a time offset difference between the foregoing two time-frequency resource locations, and generates a scrambling code sequence based on the time offset difference; and the terminal device separately descrambles the two broadcast channel signals based on the scrambling code sequence and a preset scrambling code sequence.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: October 20, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xu Zhang, Jianqin Liu, Bingyu Qu
  • Patent number: 10785085
    Abstract: Systems, methods, apparatuses, and computer program products for probabilistic amplitude shaping (PAS) are provided. One method may include selecting a distribution parameter for one constellation in a communications system depending on one or more flat fading channels, transforming a uniform distribution of the constellation into a shaped distribution using the selected distribution parameter to produce modulated data, and passing the modulated data through a fading channel.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: September 22, 2020
    Assignee: NOKIA TECHNOLOGIES OY
    Inventors: Fanny Jardel, Jie Chen, Philippe Sehier
  • Patent number: 10772159
    Abstract: This disclosure describes systems, methods, and devices related to channel estimation for coordinated access point (AP) transmissions. A device may identify of one or more access points associated with a coordinated basic service set. The device may determine to transmit one or more packets to a station device in coordination with the one or more access points. The device may determine one or more first training fields associated with one or more antennas of the device. The device may cause to send the one or more first training fields to the station device on one or more first communication links between the device and the station device.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: September 8, 2020
    Assignee: Intel Corporation
    Inventors: Shahrnaz Azizi, Thomas J. Kenney, Roya Doostnejad, Juan Fang
  • Patent number: 10757690
    Abstract: Aspects of the disclosure relate to wireless communication systems configured to provide piggyback downlink control information within the physical downlink shared channel (PDSCH). A first downlink control information portion may be transmitted within the physical downlink control channel (PDCCH) and may include information indicating a size of a second downlink control information portion transmitted within the PDSCH.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: August 25, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Jing Sun, Jing Jiang, Wanshi Chen, Peter Pui Lok Ang, Tao Luo, Yang Yang, Jamie Menjay Lin
  • Patent number: 10728075
    Abstract: A method for receiving broadcast signals by an apparatus for receiving broadcast signals, the method includes receiving the broadcast signals having Orthogonal Frequency Division Multiplex (OFDM) symbols including at least one preamble OFDM symbol and at least one data OFDM symbol on which power normalization is performed by using power normalization factors acquired from a frequency domain total power for the OFDM symbols; demodulating the at least one preamble OFDM symbol and the at least one data OFDM symbol into at least one preamble symbol and at least one data symbol by an OFDM scheme; parsing at least one signal frame including the at least one preamble symbol for signaling data and the at least one data symbol for service data; decoding the signaling data; and decoding the service data.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: July 28, 2020
    Assignee: LG ELECTRONICS INC.
    Inventors: Jaehyung Kim, Woosuk Ko, Sungryong Hong
  • Patent number: 10721633
    Abstract: A communication control method, for causing a wireless communication device including an antenna array including a plurality of antenna elements to execute a process, includes: executing a first process that includes dividing the plurality of antenna elements into a plurality of element blocks, each of the plurality of element blocks including two or more antenna elements; executing a second process that includes forming a broad beam by steering beams that are formed by first and second element blocks of the plurality of element blocks the beam formed by the first element block being orthogonalized with the beam formed by the second element block; and executing a third process that includes orthogonalizing a first signal to be transmitted by the first element block and a second signal to be transmitted by the second element block.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: July 21, 2020
    Assignee: FUJITSU LIMITED
    Inventor: Masafumi Tsutsui
  • Patent number: 10715230
    Abstract: A transmission method includes generating a first precoded signal and a second precoded signal by performing a precoding process on a first baseband signal and a second baseband signal, outputting a third signal by inserting a pilot signal into the first precoded signal, outputting a fourth signal by applying a first phase change to the second precoded signal, outputting a fifth signal by inserting a pilot signal into the fourth signal, and outputting a sixth signal by applying a second phase change to the fifth signal.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: July 14, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 10659267
    Abstract: The present specification relates to a method for transmitting and receiving signals in a wireless local area network (WLAN) system and an apparatus therefor, the method comprising the steps of: generating a training sub-field consisting of a certain number of orthogonal frequency division multiplexing (OFDM) symbols; and transmitting, to a second STA, a signal including a header field and the training sub-field, wherein the transmitted signal is repeatedly transmitted T times (where T is a natural number) on the basis of information indicated by the header field after a data field.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: May 19, 2020
    Assignee: LG ELECTRONICS INC.
    Inventors: Sunwoong Yun, Jinmin Kim, Sungjin Park, Jinsoo Choi
  • Patent number: 10651994
    Abstract: Provided is a radio communication device which can separate propagation paths of antenna ports and improve a channel estimation accuracy even when using virtual antennas. The device includes: a mapping unit which maps a data signal after modulation to a virtual antenna and a virtual antenna; a phase inversion unit which inverts the phase of S0 transmitted from an antenna port in synchronization with a phase inversion unit between the odd-number slot and the even-number slot; the phase inversion unit which inverts the phase of R0 transmitted from the antenna port; a phase inversion unit which inverts the phase of S1 transmitted from an antenna port in synchronization with a phase inversion unit; and the phase inversion unit which inverts the phase of R1 transmitted from an antenna port.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: May 12, 2020
    Assignee: Sun Patent Trust
    Inventors: Seigo Nakao, Masayuki Hoshino, Atsushi Sumasu, Katsuhiko Hiramatsu
  • Patent number: 10651904
    Abstract: A scaled precoded data signal can be received. The scaled precoded data signal can be based on a precoder-dependent scaling factor. The scaled precoded data signal can be scaled by using a precoder dependent scaling factor that is dependent on a precoder used to precode the data signal. The scaled precoded data signal can be demodulated.
    Type: Grant
    Filed: December 31, 2018
    Date of Patent: May 12, 2020
    Assignee: Motorola Mobility LLC
    Inventors: Colin Frank, Tyler A. Brown
  • Patent number: 10644771
    Abstract: A system and method for increasing the capacity of a Multiple-Input Multiple-Output (MIMO) system at desired user's locations and reducing the capacity at locations, other than that of the desired user, while also providing secrecy. Knowing the channel coefficient between each transmitter and receiver antenna pair at the transmitter, the method of the present invention calculates the artificial signal that minimizes the Euclidean distance between the desired and received data symbols if the precoding/combining matrix pair from the set that has the minimum Euclidean distance to the singular value decomposition (SVD) of the channel matrix is used for transmission and reception. The artificial signal may be fed to the precoder, instead of the actual desired data symbols, or may be transmitted directly to reduce computational complexity, power consumption and processing delay if the hardware configuration allows.
    Type: Grant
    Filed: December 3, 2019
    Date of Patent: May 5, 2020
    Assignee: University of South Florida
    Inventors: Berker Pekoz, Mohammed Hafez, Selcuk Kose, Huseyin Arslan
  • Patent number: 10644847
    Abstract: An apparatus includes a coding unit configured to divide a transport block into one or more code blocks and generate coded bit(s) by coding the one or more code blocks, and a transmitter configured to transmit the coded bit(s) by using a channel, wherein multiplex bit(s) are given based on at least coupling of the coded bit(s) generated by coding of the one or more code blocks, the coding unit maps the multiplex bit(s) to a matrix in a first-axis prioritized manner and reads the multiplex bit(s) from the matrix in the first-axis prioritized manner or in a second-axis prioritized manner, and whether the first axis or the second axis is prioritized in a case that the multiplex bit(s) are read from the matrix is given based on at least the number of OFDM symbols of the channel.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: May 5, 2020
    Assignees: Sharp Kabushiki Kaisha, FG Innovation Company Limited
    Inventors: Tomoki Yoshimura, Shoichi Suzuki, Tatsushi Aiba, Liqing Liu, Wataru Ouchi, Takashi Hayashi, Kimihiko Imamura
  • Patent number: 10638495
    Abstract: A terminal apparatus, a base station apparatus, a communication method, an integrated circuit, and a radio communication system are provided that enable a base station apparatus and a terminal apparatus to determine parameters relating to an uplink reference signal and efficiently communicate with each other.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: April 28, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tatsushi Aiba, Shoichi Suzuki
  • Patent number: 10630322
    Abstract: An RF communication system includes a wideband receiver for receiving an RF signal; a wideband receive signal path for processing the received RF signal, a wideband transmit signal path for processing a transmit RF signal to be transmitted; a wideband transmitter for transmitting the transmit RF signal at a selected transmit frequency and a selected transmit polarization; and a processor for controlling a plurality of beam forming circuits for performing signal processing and waveform generation, wherein the processor maximizes an effective radiated power (ERP) of the communication system within a predetermined ERP limit by switching the wideband transmitter between at least one of multiple transmit frequencies and multiple transmit polarizations to form an aggregate, time-averaged signal as the transmit RF signal.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: April 21, 2020
    Assignee: RAYTHEON COMPANY
    Inventors: Harry B. Marr, Daniel Thompson
  • Patent number: 10616737
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a configuration message indicating a payload size configuration for machine type communication (MTC) physical uplink control channel (PUCCH) messages. The UE may generate an MTC PUCCH message based at least in part on the payload size configuration and a PUCCH format of MTC uplink control information for transmission by the UE. The UE may transmit the MTC PUCCH message over a plurality of RBs in a frequency domain.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: April 7, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Chih-Hao Liu, Srinivas Yerramalli, Tamer Kadous
  • Patent number: 10587329
    Abstract: Disclosed aspects relate to methods and apparatus for controlling a wireless device having at least one radio frequency (RF) system. The methods and apparatus are configured to select an antenna for transmission of signals from radio components of the at least one RF system from between a first default antenna normally coupled to the radio components of the at least one RF system for transmission of signals and one of a plurality of other antennas in the wireless device. Further, switching is configured to couple the radio components to one of the other plurality of antennas selected as the antenna for transmission cycles when the radio components are transmitting in an antenna switch diversity (ASDIV) period. Additionally, the methods and apparatus are configured to operate a switch to couple the radio components back to at least the first default antenna during receiving cycles during the ASDIV period.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: March 10, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: David Maldonado, Andrew Puayhoe See
  • Patent number: 10560223
    Abstract: A method and apparatus for implementing spatial processing with unequal modulation and coding schemes (MCSs) or stream-dependent MCSs are disclosed. Input data may be parsed into a plurality of data streams, and spatial processing is performed on the data streams to generate a plurality of spatial streams. An MCS for each data stream is selected independently. The spatial streams are transmitted via multiple transmit antennas. At least one of the techniques of space time block coding (STBC), space frequency block coding (SFBC), quasi-orthogonal Alamouti coding, time reversed space time block coding, linear spatial processing and cyclic delay diversity (CDD) may be performed on the data/spatial streams. An antennal mapping matrix may then be applied to the spatial streams. The spatial streams are transmitted via multiple transmit antennas. The MCS for each data stream may be determined based on a signal-to-noise ratio of each spatial stream associated with the data stream.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: February 11, 2020
    Assignee: INTERDIGITAL TECHNOLOGY CORPORATION
    Inventors: Robert L. Olesen, Eldad M. Zeira, Peter J. Voltz, Yongwen E. Yang, Qingyuan Dai, Chang-Soo Koo, I-Tai Lu, KunJu Tsai
  • Patent number: 10536821
    Abstract: A communication device is used in a mobile communication system switching alternately two communication time zones of a control channel (CCH) time zone in which communication using a control channel (CCH) is performed and a service channel time zone in which communication using a service channel is performed. A CCH transmission processor section transmits data using the control channel. When a generated data by a data generator section is determined by an importance determiner section to be equivalent to a data having a high-importance level, the generated data is transmitted in the CCH time zone by the CCH transmission processor section. By contrast, when the generated data is determined to be equivalent to a data having a low-importance level, the generated data is transmitted in the SCH time zone by the CCH transmission processor section.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: January 14, 2020
    Assignee: DENSO CORPORATION
    Inventors: Takahisa Yamashiro, Seigou Kumabe
  • Patent number: 10530437
    Abstract: All data symbols used in data transmission of a modulated signal are precoded by switching between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol along the frequency axis and the time axis all differ. A modulated signal with such data symbols arranged therein is transmitted.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: January 7, 2020
    Assignee: SUN PATENT TRUST
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 10516452
    Abstract: A system and method for increasing the capacity of a Multiple-Input Multiple-Output (MIMO) system at desired user's locations and reducing the capacity at locations, other than that of the desired user, while also providing secrecy. Knowing the channel coefficient between each transmitter and receiver antenna pair at the transmitter, the method of the present invention calculates the artificial signal that minimizes the Euclidean distance between the desired and received data symbols if the precoding/combining matrix pair from the set that has the minimum Euclidean distance to the singular value decomposition (SVD) of the channel matrix is used for transmission and reception. The artificial signal may be fed to the precoder, instead of the actual desired data symbols, or may be transmitted directly to reduce computational complexity, power consumption and processing delay if the hardware configuration allows.
    Type: Grant
    Filed: January 3, 2019
    Date of Patent: December 24, 2019
    Assignee: University of South Florida
    Inventors: Berker Pekoz, Mohammed Hafez, Selcuk Kose, Huseyin Arslan
  • Patent number: 10492208
    Abstract: A method (20) of scheduling communications devices (3a, 3b, 3c) in a communications system (1) is disclosed. The method (20) is performed in a network node (2) arranged to serve a number of communications devices (3a, 3b, 3c) by using an analog beamformer and comprises: identifying (21) two or more of the communications devices (3a, 3b, 3c) as candidates for co-scheduling, determining (22) complex antenna weights for one or more beams B1 based on transmission beam reports received from each of the two or more identified communications devices (3a, 3b, 3c), and co-scheduling (23) the two or more of the communications devices (3a, 3b, 3c) simultaneously using the one or more determined beams B1, wherein the number of determined beams is less than the number of communications devices (3a, 3b, 3c). A corresponding network node (2), computer program and computer program products are provided.
    Type: Grant
    Filed: October 30, 2017
    Date of Patent: November 26, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Sven Petersson, Fredrik Athley, Andreas Nilsson
  • Patent number: 10454539
    Abstract: [Object] To enable a cell appropriate for a terminal device to be selected when beamforming is performed. [Solution] Provided is a device including: an acquisition unit configured to acquire multiple weight sets for beamforming; and a control unit configured to map a reference signal for measurement to radio resources associated with a weight set in advance for each weight set included in the multiple weight sets, and multiply the reference signal by the weight set.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: October 22, 2019
    Assignee: SONY CORPORATION
    Inventor: Hiroaki Takano
  • Patent number: 10454547
    Abstract: All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: October 22, 2019
    Assignee: SUN PATENT TRUST
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 10439778
    Abstract: Provided is a radio communication device which can separate propagation paths of antenna ports and improve a channel estimation accuracy even when using virtual antennas. The device includes: a mapping unit which maps a data signal after modulation to a virtual antenna and a virtual antenna; a phase inversion unit which inverts the phase of S0 transmitted from an antenna port in synchronization with a phase inversion unit between the odd-number slot and the even-number slot; the phase inversion unit which inverts the phase of R0 transmitted from the antenna port; a phase inversion unit which inverts the phase of S1 transmitted from an antenna port in synchronization with a phase inversion unit; and the phase inversion unit which inverts the phase of R1 transmitted from an antenna port.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: October 8, 2019
    Assignee: Sun Patent Trust
    Inventors: Seigo Nakao, Masayuki Hoshino, Atsushi Sumasu, Katsuhiko Hiramatsu
  • Patent number: 10419137
    Abstract: In a digital communication system there is provided a method for OFDM channel estimation that jointly considers the effects of coarse timing error and multipath propagation. The method uses an iterative channel estimation technique, which considers the practical scenario of fractional timing error and non-sample space echo delays. The method does not require channel state information such as second-order statistic of the channel impulse responses or the noise power. Moreover, timing error can be conveniently obtained with the proposed technique. Simulation shows that, when comparing OFDM channel estimation techniques under DOCSIS 3.1 realistic channel conditions, the proposed algorithm significantly outperforms conventional methods.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: September 17, 2019
    Assignee: VECIMA NETWORKS INC.
    Inventors: Brian Michael Berscheid, Tung Trong Nguyen, Joseph Eric Salt, Ha Hoang Nguyen
  • Patent number: 10374676
    Abstract: In general, this disclosure describes techniques for beamforming using limited feedback that exploit the spatio-temporal channel correlation and avoid the limitations of codebook-based feedback and Markov chain modeling. In one example, a receiving device includes a plurality of receive antennas for receiving communication information, a memory for storing the communication information, and one or more processors for processing the communication information. The one or more processors are configured to receive, through a wireless communication channel, a pilot signal transmitted by a transmitting device, determine, based on the received pilot signal, channel state feedback comprising a quantized representation of the pilot signal as received at the receiving device, and send, through the wireless communication.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: August 6, 2019
    Assignee: Regents of the University of Minnesota
    Inventors: Nikolaos D. Sidiropoulos, Omar A. Mehanna
  • Patent number: 10341153
    Abstract: A peak power reduction device includes a unit for dividing digital information to be transmitted into a plurality of streams; a unit for selecting the modulation level of the streams and distribution of transmission power according to a transmission state; a unit for performing singular-value decomposition on the transmission path characteristic of a streams and precoding the resultant data by a right singular value matrix; a unit for performing complex mapping on the subcarrier of a stream according to the modulation level; a unit for converting a complex mapping signal into a time domain signal; a first unit for storing a conversion result as a time domain signal; a second unit for calculating a peak time signal exceeding a predetermined threshold value from a peak value, if any exists, that exceeds a prescribed threshold value for the amplitude of the time domain signal.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: July 2, 2019
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Tatsuhiro Nakada, Hiroki Kato, Kei Ito, Satoru Ejima
  • Patent number: 10313168
    Abstract: A method and apparatus for transmitting/receiving a downlink channel in a wireless communication system are provided. A downlink control channel and a downlink data channel corresponding to the downlink control channel are transmitted/received within a transmission time interval (TTI). A reference signal (RS) of an antenna port used for transmission of both the downlink control channel and the downlink data channel is transmitted/received on an OFDM symbol with the downlink control channel, and an RS of an antenna port used only for transmission of the downlink data channel is transmitted in the remaining OFDM symbol(s) of the TTI.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: June 4, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Hyangsun You, Kijun Kim, Yunjung Yi
  • Patent number: 10305552
    Abstract: Provided are a method and a device for transmitting a feedback frame in a wireless LAN system. Particularly, a first wireless station receives, from a second wireless station, a feedback request field including an LTF. The first wireless station configures feedback information on a wireless channel corresponding to a preset frequency band by using the feedback request field. The first wireless station transmits the feedback information to the second wireless station.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: May 28, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Eunsung Park, Jinyoung Chun, Jinsoo Choi, Dongguk Lim, Hangyu Cho
  • Patent number: 10298373
    Abstract: A radio base station, user equipment (UE), and method of control signaling in wireless communication systems. Control information is transferred from a base station to at least one UE, via a plurality of common pilot channels. A set of unique pilot sequences is predefined, and the base station assigns specific pilot sequences from the set of pilot sequences to specific common pilot channels, forming a pilot sequence assignment pattern representing specific control information. The UE, having knowledge of the relations between pilot sequence assignment patterns and control information, interprets the received pilot sequence assignment pattern as specific control information. The method is particularly well suited for broadcast type control information.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: May 21, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Yi-Pin Eric Wang, Jung-Fu Cheng, Stephen Grant, Karl J. Molnar, Leonid Krasny
  • Patent number: RE47565
    Abstract: The present invention provides an advantageous transmitter apparatus and associated method, for generating a Single-Carrier Discrete Cosine Transform (SC-DCT) OFDM signal for transmission. These transmit-side innovations include circuit configuration and signal processing methods for mapping Ku “input subcarriers” to N “output subcarriers,” where the “output subcarriers” are some or all of the subcarriers defined for the SC-DCT OFDM signal. In one or more embodiments, Ku is less than N, and the mapping is based on advantageous DCT/IDCT precoding. The present invention additionally or alternatively includes advantageous frequency-selective mapping, and further provides a corresponding receiver apparatus and associated method, for receiving and de-mapping the SC-DCT OFDM signals contemplated herein.
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: August 6, 2019
    Assignee: Guangdong Oppo Mobile Telecommunications Corp., LTD.
    Inventor: Stefano Sorrentino