Particular Set Of Orthogonal Functions Patents (Class 370/208)
  • Patent number: 11146437
    Abstract: A base station may generate and transmit a transport stream including a sequence of frames. A frame may include a plurality of partitions, where each partition includes a corresponding set of OFDM symbols. For each partition, the OFDM symbols in that partition may have a corresponding cyclic prefix size and a corresponding FFT size, allowing different partitions to be targeted for different collections of user devices, e.g., user devices having different expected values of maximum delay spread and/or different ranges of mobility. The base station may also dynamically re-configure the sample rate of each frame, allowing further resolution in control of subcarrier spacing. By allowing the cyclic prefixes of different OFDM symbols to have different lengths, it is feasible to construct a frame that confirms to a set payload duration and has arbitrary values of cyclic prefix size per partition and FFT size per partition. The partitions may be multiplexed in time and/or frequency.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: October 12, 2021
    Assignee: ONE MEDIA, LLC
    Inventors: Michael J. Simon, Kevin A. Shelby, Mark Earnshaw
  • Patent number: 11140713
    Abstract: Systems and methods are described herein relating to preemptive retransmission of a transport block in successive subframes on, e.g., a Listen-Before-Talk (LBT) cell. Embodiments of a method of operation of a radio node of a cellular communications network are disclosed. The radio node serves an LBT cell. In some embodiments, the method of operation of the radio node comprises transmitting a transport block in a first subframe on the LBT cell and retransmitting the transport block in a second subframe (e.g., on the LBT cell), where the second subframe is adjacent, in time, to the first subframe. In embodiments in which the retransmission of the transport block is on the LBT cell (or another LBT cell), the time span of a transmission burst can be extended to a maximum allowed burst duration.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: October 5, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Amitav Mukherjee, Jung-Fu Cheng, Sorour Falahati, Havish Koorapaty, Daniel Larsson, Yu Yang
  • Patent number: 11128393
    Abstract: The present disclosure provides electronic device and method for interleaved multiple access communication. An electronic device for an interleaved multiple access control terminal comprises a processing circuit, which is configured to acquire information about interleaved multiple access communication between a receiving apparatus and a transmitting apparatus; determine configuration parameters for the transmitting apparatus based on the information, the configuration parameters comprising operation parameters of an interleaver of the transmitting apparatus, the interleaver being used to distinguish the transmitting apparatus from other transmitting apparatus; and provide the determined configuration parameters to the transmitting apparatus, so that the transmitting apparatus is configured with the transmitting parameters for communicating with the receiving apparatus.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: September 21, 2021
    Assignee: SONY CORPORATION
    Inventors: Zhiyuan Lin, Jin Sima, Bo Bai, Wei Chen, Xin Guo
  • Patent number: 11125888
    Abstract: A method and apparatus is claimed here for reduced-complexity detection and estimation of geo-observables of global navigation satellite systems (GNSS) signals employing civil formats with repeating ranging codes, including true GNSS signals generated by satellite vehicles (SV's) or ground beacons (pseudo-lites), and malicious GNSS signals, e.g., spoofers and repeaters, using multi-subband symbol-rate synchronous channelization architectures that can exploit the full substantive bandwidth of the GNSS signals with managed complexity in each subband. Aspects employing spatial/polarization receivers are also claimed that can remove and geolocate non-GNSS jammers received by the system, as well as targeted GNSS spoofers that can otherwise emulate GNSS signals received at victim receivers.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: September 21, 2021
    Inventor: Brian G. Agee
  • Patent number: 11129023
    Abstract: In one embodiment, a router includes one or more processors and one or more computer-readable non-transitory storage media coupled to the one or more processors. The one or more computer-readable non-transitory storage media include instructions that, when executed by the one or more processors, cause the router to perform operations including receiving software-defined networking in a wide area network (SD-WAN) policies from a component of an SD-WAN network. The operations also include establishing a session with a mobile device and receiving information associated with the mobile device in response to establishing the session with the mobile device. The operations further include filtering the SD-WAN policies based on the information associated with the mobile device to generate SD-WAN device-specific policies and communicating the SD-WAN device-specific policies to the mobile device.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: September 21, 2021
    Assignee: Cisco Technology, Inc.
    Inventors: Stefan Olofsson, Ijsbrand Wijnands, Hendrikus G. P. Bosch, Jeffrey Napper, Anubhav Gupta
  • Patent number: 11129076
    Abstract: One exemplary embodiment is directed to an efficient baseband predistortion linearization method. The exemplary method at least reduces the spectral regrowth and compensates for memory effects in wideband communication systems. The exemplary method uses an effective multiplexing modulation technique, such as wideband code division multiple access and orthogonal frequency division multiplexing. Another exemplary aspect utilizes a piecewise pre-equalized lookup table based predistortion, which is a cascade of a lookup table predistortion and piecewise pre-equalizers.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: September 21, 2021
    Assignee: DALI WIRELESS, INC.
    Inventors: Wan-Jong Kim, Kyoung Joon Cho, Jong Heon Kim, Shawn Patrick Stapleton
  • Patent number: 11109388
    Abstract: The disclosure discloses a method and device in a user equipment and a base station for wireless communication. The UE performs K channel listening in K sub-bands, respectively; determines that a first radio signal can only be transmitted in K1 sub-band(s) out the K sub-bands; and transmits the first radio signal in the K1 sub-band(s), wherein the K channel listening is used to determine the K1 sub-band(s) from the K sub-bands; the first radio signal comprises K1 first sub-signal(s) transmitted in the K1 sub-band(s), respectively; each of the K1 first sub-signal(s) carries a first bit block, the first bit block comprises a positive integer number of bits, and a number of REs occupied by any one of the K1 first sub-signal(s) in a time-frequency domain is correlated with the K1. The method not only ensures the reliability of uplink transmission but also avoids waste of resources in an NR-U system.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: August 31, 2021
    Assignee: SHANGHAI LANGBO COMMUNICATION TECHNOLOGY COMPANY LIMITED
    Inventors: KeYing Wu, XiaoBo Zhang, Lin Yang
  • Patent number: 11102780
    Abstract: A first communication device generates a plurality of media access control (MAC) layer data units to be transmitted to a second communication device via a communication channel that includes a first frequency segment and a second frequency segment separated by a gap in frequency. The first communication device generates one or more physical layer (PHY) data units that include the plurality of MAC layer data units, and simultaneously transmits i) a first frequency portion of the one or more PHY data units via the first frequency segment, and ii) a second frequency portion of the one or more PHY data units via the second frequency segment, including transmitting a first MAC layer data unit in the first frequency portion, and ii) transmitting a second MAC layer data unit in the second frequency portion.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: August 24, 2021
    Assignee: NXP USA, INC.
    Inventors: Liwen Chu, Hongyuan Zhang
  • Patent number: 11096128
    Abstract: Various aspects described herein relate to techniques for signaling and channel design in wireless communications systems (e.g., a 5G NR system). In an aspect, a method includes identifying a direct current (DC) subcarrier of a synchronization bandwidth, determining whether a synchronization signal transmits on, punctures, or rate matches around the DC subcarrier, and performing synchronization channel processing based on the determination.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: August 17, 2021
    Assignee: Qualcomm Incorporated
    Inventors: Xiaoxia Zhang, Taesang Yoo, Juan Montojo, Tao Luo, Zhifei Fan
  • Patent number: 11088801
    Abstract: Disclosed herein is a method of transmitting a reference signal for channel state change measurement and an apparatus therefor. The method includes receiving, from a transmitter, a first type reference signal of a first resource mapping pattern and a second type reference signal of a second resource mapping pattern. The receiver receives the first type reference signal under an assumption that the first type reference signal is associated with the second type reference signal, when a specific condition is satisfied.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: August 10, 2021
    Assignee: LG ELECTRONICS INC.
    Inventors: Hyunsoo Ko, Kijun Kim
  • Patent number: 11088773
    Abstract: A method for orthogonal wavicle division multiple-access modulation-demodulation includes: generate an orthogonal quantum chaotic data wavicles matrix and a quantum chaotic sync wavicle according to a key including the required data bit-rate, the parallel symbols transmission scheme, the signal updating/sampling rate, the available energy spectrum range, and either the ID of the source user or other perturbation schemes agreed upon by the transmitter and receiver; generate and transmit a modulated quantum chaotic wavicle by orthogonal wavicle division multiplexing modulating a serial bits segment to an orthogonal quantum chaotic data wavicles matrix plus a quantum chaotic sync wavicle; and retrieve the serial bits segment by orthogonal wavicle division multiplexing demodulating the received signal synchronously with an orthogonal quantum chaotic data wavicles matrix plus a quantum chaotic sync wavicle.
    Type: Grant
    Filed: November 12, 2020
    Date of Patent: August 10, 2021
    Inventor: Yanhua Jiao
  • Patent number: 11082964
    Abstract: An uplink data transmission method and device are provided. The method includes: receiving, by a network device, a control symbol sent by a terminal device by using a control time-frequency resource, wherein the control symbol carries control information, wherein the control information indicates a data encoding scheme at the terminal device, wherein the control time-frequency resource belongs to a transmission resource that includes a data time-frequency resource, and wherein the control time-frequency resource and the data time-frequency resource are different; demodulating and decoding, at the network device, the control symbol to obtain the control information; and decoding, at the network device and according to the control information, a data symbol to obtain uplink data, wherein the data symbol is received from the terminal device by way of the data time-frequency resource.
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: August 3, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Hejia Luo, Rong Li, Guangzhu Zeng
  • Patent number: 11082173
    Abstract: Embodiments are provided for supporting variable sub-carrier spacing and symbol duration for transmitting OFDM or other waveform symbols and associated cyclic prefixes. The symbol duration includes the useful symbol length and its associated cyclic prefix length. The variable sub-carrier spacing and symbol duration is determined via parameters indicating the sub-carrier spacing, useful symbol length, and cyclic prefix length. An embodiment method, by a network or a network controller, includes establishing a plurality of multiple access block (MAB) types defining different combinations of sub-carrier spacing and symbol duration for waveform transmissions. The method further includes partitioning a frequency and time plane of a carrier spectrum band into a plurality of MAB regions comprising frequency-time slots for the waveform transmissions. The MAB types are then selected for the MAB regions, wherein one MAB type is assigned to one corresponding MAB region.
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: August 3, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jianglei Ma, Ming Jia
  • Patent number: 11075722
    Abstract: Embodiments are provided for supporting variable sub-carrier spacing and symbol duration for transmitting OFDM or other waveform symbols and associated cyclic prefixes. The symbol duration includes the useful symbol length and its associated cyclic prefix length. The variable sub-carrier spacing and symbol duration is determined via parameters indicating the sub-carrier spacing, useful symbol length, and cyclic prefix length. An embodiment method, by a network or a network controller, includes establishing a plurality of multiple access block (MAB) types defining different combinations of sub-carrier spacing and symbol duration for waveform transmissions. The method further includes partitioning a frequency and time plane of a carrier spectrum band into a plurality of MAB regions comprising frequency-time slots for the waveform transmissions. The MAB types are then selected for the MAB regions, wherein one MAB type is assigned to one corresponding MAB region.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: July 27, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jianglei Ma, Ming Jia
  • Patent number: 11075708
    Abstract: Systems and methods for mitigation of cross channel interference are disclosed in which the TDD configuration of a potential cross channel interference source is detected by received signals within the network with which the source interferes. The TDD configuration is then used to synchronize the transmissions from the network with which the source interferes to reduce the interference. In addition, interference is mitigated by providing adaptive guard bands based on results of a radio frequency environmental survey and/or coaxing an interfering user to another channel. Sub-channels can be assigned based on the results of the radio frequency environmental survey and Quality of Service requirements for traffic flows.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: July 27, 2021
    Assignee: pSemi Corporation
    Inventors: Mehmet Yavuz, Nagi Mahalingam
  • Patent number: 11075786
    Abstract: Carrier Interferometry (CI) provides wideband transmission protocols with frequency-band selectivity to improve interference rejection, reduce multipath fading, and enable operation across non-continuous frequency bands. Direct-sequence protocols, such as DS-CDMA, are provided with CI to greatly improve performance and reduce transceiver complexity. CI introduces families of orthogonal polyphase codes that can be used for channel coding, spreading, and/or multiple access. Unlike conventional DS-CDMA, CI coding is not necessary for energy spreading because a set of CI carriers has an inherently wide aggregate bandwidth. Instead, CI codes are used for channelization, energy smoothing in the frequency domain, and interference suppression. CI-based ultra-wideband protocols are implemented via frequency-domain processing to reduce synchronization problems, transceiver complexity, and poor multipath performance of conventional ultra-wideband systems.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: July 27, 2021
    Assignee: Genghiscomm Holdings, LLC
    Inventor: Steve Shattil
  • Patent number: 11070270
    Abstract: An apparatus for a beamformee and a method are provided. The apparatus includes a first beamforming matrix device configured to generate a first beamforming matrix VWB from a channel H; an equivalent channel device configured to generate an equivalent channel {tilde over (H)}k based on the channel H and the first beamforming matrix VWB, where k is a number that indicates a subcarrier index; and a second beamforming matrix device configured to obtain a second beamforming matrix VSC from the equivalent channel {tilde over (H)}k.
    Type: Grant
    Filed: August 4, 2020
    Date of Patent: July 20, 2021
    Inventors: Wook Bong Lee, Minyoung Park, Tianyu Wu
  • Patent number: 11063724
    Abstract: A method for reducing channel sounding overhead in a MU-MIMO WLAN system, and apparatus for performing the method are disclosed. The method includes transmitting a sparse set of pilot symbols in a pseudorandom distribution across a plurality of subcarriers, from a plurality of antennas to one or more client devices on a plurality of spatial streams; receiving a sparse set of channel estimates in the frequency and spatial domains, from the one or more client devices as beamforming feedback based on the sparse set of pilot symbols; and recovering the channel in a compressed sensing framework.
    Type: Grant
    Filed: January 14, 2020
    Date of Patent: July 13, 2021
    Assignee: Cypress Semiconductor Corporation
    Inventors: Prasanna Kumar Sethuraman, Sridhan Sreepadha
  • Patent number: 11063712
    Abstract: Embodiments are provided for supporting variable sub-carrier spacing and symbol duration for transmitting OFDM or other waveform symbols and associated cyclic prefixes. The symbol duration includes the useful symbol length and its associated cyclic prefix length. The variable sub-carrier spacing and symbol duration is determined via parameters indicating the sub-carrier spacing, useful symbol length, and cyclic prefix length. An embodiment method, by a network or a network controller, includes establishing a plurality of multiple access block (MAB) types defining different combinations of sub-carrier spacing and symbol duration for waveform transmissions. The method further includes partitioning a frequency and time plane of a carrier spectrum band into a plurality of MAB regions comprising frequency-time slots for the waveform transmissions. The MAB types are then selected for the MAB regions, wherein one MAB type is assigned to one corresponding MAB region.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: July 13, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jianglei Ma, Ming Jia
  • Patent number: 11056775
    Abstract: An integrated antenna module to be applied to an in-vehicle system includes an antenna element group that is mounted on a vehicle and is formed of a plurality of antenna elements, and the antenna element group constitutes a plurality of antennas capable of transmitting or receiving a plurality of electromagnetic waves by combining the plurality of antenna elements.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: July 6, 2021
    Assignee: YAZAKI CORPORATION
    Inventors: Takashi Shiroki, You Yanagida, Kunihiko Yamada, Ryoma Toyoda
  • Patent number: 11044663
    Abstract: A transmitter and a method therein for transmitting discovery signals to a receiver. The transmitter and the receiver are comprised in a radio communications system. The transmitter transmits two or more discovery signals over two or more directions. Each discovery signal is configured to span over a fraction of a carrier bandwidth.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: June 22, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Robert Baldemair, Kumar Balachandran, Dennis Hui
  • Patent number: 11039445
    Abstract: Embodiments of the present disclosure relate the field of communications. Provided are an information sending method, an information receiving method, an apparatus and a system. The method includes: generating, by a terminal, UE capability information, the UE capability information being used for indicating a parallel processing capability of the terminal for signals sent and/or received by subcarriers having different subcarrier intervals and/or used for indicating a data caching capability of the terminal; sending, by the terminal, the UE capability information to an access network device; and receiving, by the access network device, the UE capability information.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: June 15, 2021
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Ning Yang, Hua Xu
  • Patent number: 11039450
    Abstract: Provided are an electronic device and a method for an electronic device. The electronic device comprises a processing circuit, configured to: determine sub-system in specific region, and based on relative interference between the sub-systems and quality of service requirements for the sub-systems, clustering the sub-systems.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: June 15, 2021
    Assignee: SONY CORPORATION
    Inventors: Youping Zhao, Yiteng Wang, Xin Guo, Chen Sun
  • Patent number: 11032035
    Abstract: A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: June 8, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Rajiv Laroia, Junyi Li, Sathyadev Venkata Uppala
  • Patent number: 11025310
    Abstract: Technology for a user equipment (UE) operable to assist a Next Generation NodeB (gNB) for beamforming is disclosed. The UE can determine a covariance matrix for a channel between the UE and the gNB. The UE can quantize the covariance matrix to obtain a quantized covariance matrix. The quantized covariance matrix can include M best diagonal entries that are selected from the covariance matrix, wherein M is an integer. The UE can encode the quantized covariance matrix as feedback for transmission to the gNB.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: June 1, 2021
    Assignee: APPLE INC.
    Inventors: Alexei Davydov, Gregory V. Morozov, Victor Sergeev, Wook Bong Lee
  • Patent number: 11018794
    Abstract: A method and apparatus for transmitting or detecting primary synchronization signal. The receiver receives primary synchronization signal from a transmitter, and detects the sequence used in the received primary synchronization signal by using three root indexes. Here, the primary synchronization signal is generated by using a Zadoff-Chu sequence having one of the three root indexes. The three root indexes comprise a first index and a second index, and a sum of the first index and the second index corresponds to the length of the Zadoff-Chu sequence.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: May 25, 2021
    Assignee: WILD GUARD LTD.
    Inventors: Seung Hee Han, Min Seok Noh, Yeong Hyeon Kwon, Hyun Woo Lee, Dong Cheol Kim, Jin Sam Kwak
  • Patent number: 11016734
    Abstract: A communications system that pseudo-randomly dithers the widths of chips that are multiplied by bit symbols for spread spectrum purposes. The system includes a first random sequence generator that generates a first sequence of random numbers at a sample rate and a decision processor responsive to the first sequence of random numbers that generates a separate command at the sample rate each time one of the random numbers exceeds a predetermined threshold. The system further includes a second random sequence generator that generates select random numbers, where the second random number generator changes the select random number each time it receives one of the commands. The system also includes a chip width processor responsive to the random numbers from the second random sequence generator, where the chip width processor selects a new set of chips each having a certain width in response to receiving each random number.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: May 25, 2021
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Christopher W. Walker, Ameesh N. Pandya, Yen M. Hoang, Ryan K. Cole
  • Patent number: 11018916
    Abstract: The disclosure relates to a transmitter device for use in a wireless communication system, the transmitter device comprising: a processor configured to select a numerology set from a quantity of at least two numerology sets, wherein the numerology set identifies a set of transmission parameters for transmitting a transmit signal over a transmission channel, wherein the selection is based on a Signal-to-Noise Ratio (SNR) of the transmission channel; and a transmitter, configured to transmit the transmit signal based on the selected numerology set.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: May 25, 2021
    Assignee: Huawei Technologies Duesseldorf GmbH
    Inventors: Mohamed Ibrahim, Wen Xu
  • Patent number: 11013004
    Abstract: A communication system includes a communication apparatus and a base station. The communication apparatus includes a Discrete Fourier Transform (DFT) transformer which transforms a time-domain signal into a frequency-domain signal with a DFT size that is a product of powers of a plurality of values; a mapper which maps the frequency-domain signal on a plurality of frequency bands, each frequency band being located at a position separate from position(s) of other(s) of the plurality of frequency bands; and a signal generator which generates a single carrier-frequency division multiple access (SC-FDMA) time-domain signal from the mapped signal. The base station includes a receiver which receives the SC-FDMA time-domain signal; a combiner which generates the frequency-domain signal from the SC-FDMA time-domain signal; and a transformer which transforms the frequency-domain signal into the time-domain signal with an inverse Discrete Fourier Transform (IDFT) having the DFT size.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: May 18, 2021
    Assignee: Sun Patent Trust
    Inventors: Shinsuke Takaoka, Masayuki Hoshino, Kenichi Miyoshi
  • Patent number: 11006393
    Abstract: The present invention relates to a method and an apparatus for transmitting control and training symbols to improve transmission efficiency in a multi-user wireless communication system. The method for transmitting the control and training symbols in the multi-user wireless communication system according to one embodiment of the present invention comprises the steps of: determining whether a required transmission rate of each data can be satisfied through channel estimation in each of terminals when different data are simultaneously transmitted to each of the terminals; and transmitting a data frame to each of the terminals, the data frame being composed to discriminate the control and training symbols in each of the terminals using a combination of time, frequency, and code area when the required transmission rate of each data is not satisfied according to the determined result.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: May 11, 2021
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Yu-Ro Lee, Jung-Bo Son, Sok-Kyu Lee
  • Patent number: 10999034
    Abstract: A method for transmitting a reference signal includes selecting one of a first initialization value and a second initialization value, generating selection instruction information corresponding to the selected initialization value, transmitting the selection instruction information to a mobile station, generating a reference signal based on the selected initialization value, and transmitting the generated reference signal to the mobile station. A method for estimating a channel includes receiving selection instruction information indicating a selection of at least one of a first initialization value and a second initialization value, receiving a first reference signal based on the selection instruction information, generating a second reference signal based on an initialization value indicated as being selected by the selection instruction information, and estimating a channel state by comparing the first reference signal with the second reference signal.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: May 4, 2021
    Assignee: Apple Inc.
    Inventor: Sungjun Yoon
  • Patent number: 10997060
    Abstract: Semantically equivalent variants of a computer program are generated by applying randomly selected transforms to the computer program. Unit tests are performed on the variants of the computer program to detect a defect in the computer program.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: May 4, 2021
    Assignee: United States of America as represented by the Secretary of the Navy
    Inventors: Sunny J. Fugate, Jason A. Landsborough, Stephen T. Harding, Charles L. Carpenter
  • Patent number: 10999821
    Abstract: A method of transmitting, by a transmitting device, an orthogonal frequency division multiplexing (OFDM) signal in a wireless communication system, the method including: generating, by a digital module of the transmitting device, a frequency-shifted OFDM baseband signal by performing frequency up-shift of a first signal by a difference between a carrier frequency 0 and a first frequency base, wherein the first frequency fbase is, among frequencies corresponding to integer multiples of 128?; closest to the carrier frequency 0, and wherein ? is an OFDM subcarrier spacing; up-converting, by an analog oscillator of the transmitting device, the frequency-shifted OFDM baseband signal by the first frequency base to generate an OFDM symbol signal at the carrier frequency fo; and transmitting the OFDM symbol signal at the carrier frequency 0.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: May 4, 2021
    Assignee: LG Electronics Inc.
    Inventors: Sukhyon Yoon, Hyunsoo Ko, Kijun Kim, Byounghoon Kim, Changhwan Park
  • Patent number: 10985957
    Abstract: A mixed numerology OFDM system is presented herein relative to a first OFDM numerology having a first subcarrier spacing and associated with a first signal having a first length. A second signal having a second length and associated with a second OFDM numerology having a second subcarrier spacing greater than the first subcarrier spacing is generated by generating a sub-frame comprising redundant data appended to each of a plurality of OFDM symbols and generating the second signal by appending group redundant data to the sub-frame such that the second length equals the first length. The number of OFDM symbols in the sub-frame is selected such that a length of the sub-frame is as large as possible without exceeding the length of the first OFDM symbol in the first signal. The receiver may extract the first the first and second signals from a received composite signal using a single FFT.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: April 20, 2021
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Miguel Lopez, Bo Hagerman
  • Patent number: 10985950
    Abstract: An apparatus including: a communication unit configured to perform radio communication; and a control unit configured to perform control such that control information regarding a filter length of a filter for limiting a width of a guard band in a frequency band to be used in the radio communication is transmitted to an external apparatus through the radio communication. The filter length is determined in accordance with at least one of a frequency resource and a time resource for the radio communication. The apparatus enables a filter improving frequency use efficiency.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: April 20, 2021
    Assignee: SONY CORPORATON
    Inventors: Hiroki Matsuda, Ryota Kimura, Kazuyuki Shimezawa
  • Patent number: 10979257
    Abstract: Techniques are disclosed relating to DC interference cancelation in received wireless signals. Disclosed techniques may be performed in the digital domain, in conjunction with analog cancelation techniques. In some embodiments, a receiver apparatus operates a local oscillator at a frequency corresponding to a particular pilot symbol in a received wireless signal. In some embodiments the receiver estimates DC interference at the frequency based on the received pilot symbol (this may be facilitated by the fact that the contents of pilot symbols are known, because they are typically used for channel estimation). In some embodiments, the receiver apparatus is configured to cancel the DC interference based on the estimate to determine received data in subsequently received signals at the frequency. Disclosed techniques may allow narrowband receivers to efficiently use more of their allocated frequency bandwidth, rather than wasting bandwidth near the frequency of the local oscillator.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: April 13, 2021
    Assignee: Apple Inc.
    Inventors: Konstantinos Sarrigeorgidis, Tarik Tabet, Lydi Smaini
  • Patent number: 10978081
    Abstract: A system may embed audio watermarks in audio data using a sign sequence. The system may detect audio watermarks in audio data despite the effects of reverberation. For example, the system may embed multiple repetitions of an audio watermark before generating output audio using loudspeaker(s). To detect the audio watermark in audio data generated by a microphone, the system may perform a self-correlation that indicates where the audio watermark is repeated. In some examples, the system may encode the audio watermark using multiple repetitions of a multi-segment Eigenvector. Additionally or alternatively, the system may encode the audio watermark using a binary sequence of positive and negative values, which may be used as a shared key for encoding/decoding the audio watermark. The audio watermark can be embedded in output audio data to enable wakeword suppression (e.g., avoid cross-talk between devices) and/or local signal transmission between devices in proximity to each other.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: April 13, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Yuan-Yen Tai, Mohamed Mansour, Parind Shah
  • Patent number: 10965984
    Abstract: Methods, systems, and computer-readable media for minimization of video re-buffering using local animation are disclosed. A client device stores a portion of a video stream into a video buffer and displays the portion on a display. The stream is received from a media streaming system via one or more networks. The client device discontinues displaying the video stream. The client device generates a visualization of metadata that is displayed on the display while the video stream is not displayed. While the visualization of metadata is displayed on the display, the client device stores a newer portion of the video stream in the video buffer. The client device discontinues displaying the visualization of metadata and resumes displaying the video stream on the display.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: March 30, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Khawaja Shams, Timothy Prins
  • Patent number: 10958496
    Abstract: A transmitter includes: a first mapping unit to allocate modulation symbols to orthogonal frequency division multiplexing subcarriers; a first differential block coding unit to perform differential block coding on a part of the modulation symbols allocated; a second differential block coding unit to perform, by using output of the first differential block coding unit as a start symbol, differential block coding on a remaining modulation symbol excluding the part of the modulation symbols subjected to differential block coding by the first differential block coding unit; and a second mapping unit to convert output of the second differential block coding unit into a transmit signal that is transmitted from a plurality of antennas.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: March 23, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Shinji Masuda
  • Patent number: 10958306
    Abstract: Some embodiments include a system, method, and computer program product for managing the Ultra Wideband (UWB) systems, especially when the UWB system is collocated with another wireless system (e.g., WiFi) to transmit and/or receive UWB signals with an occupied bandwidth (OBW) that satisfies a UWB OBW standard (e.g., a UWB OBW>=500 MHz.) In some embodiments a TailBit signal (e.g., a periodic signal at a selected frequency) is added to a UWB packet to generate frequency components at the selected frequency that enables the power spectrum of the TailBit UWB signal to satisfy the UWB OBW standard. In some embodiments an altered code sequence is used to generate an altered spread signal, where the altered code sequence reduces or removes a frequency component peak near DC frequency of the power spectrum of an altered UWB signal, resulting in altered UWB OBW that satisfies the UWB OBW standard.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: March 23, 2021
    Assignee: Apple Inc.
    Inventors: Xiaoming Yu, Alejandro J. Marquez, Lei Li, Peter M. Agboh, Shang-Te Yang, Vusthla Sunil Reddy, Pradeep K. Marri, Manjit S. Walia, Ali Pourghorban Saghati
  • Patent number: 10958400
    Abstract: A method and an apparatus method are provided for transmitting uplink information including acknowledgement information in a wireless communication system. The method includes coding, by a terminal, uplink data and the acknowledgement information by using different coding schemes respectively; multiplexing, by the terminal, the coded uplink data and the coded acknowledgement information into the uplink information; and transmitting, by the terminal, the uplink information using resources. At least a portion of the uplink data is transmitted based on a first resource and the acknowledgement information is transmitted based on a second resource. The first resource and the second resource are adjacent to each other with respect to a time domain and a frequency domain. The acknowledgement information is located immediately adjacent to a pilot for the uplink data, and the pilot is used for demodulation of the uplink data.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: March 23, 2021
    Inventors: Yong-Jun Kwak, Ju-Ho Lee, Joon-Young Cho
  • Patent number: 10950249
    Abstract: A system may embed audio watermarks in audio data using an Eigenvector matrix. The system may detect audio watermarks in audio data despite the effects of reverberation. For example, the system may embed multiple repetitions of an audio watermark before generating output audio using loudspeaker(s). To detect the audio watermark in audio data generated by a microphone, the system may perform a self-correlation that indicates where the audio watermark is repeated. In some examples, the system may encode the audio watermark using multiple repetitions of a multi-segment Eigenvector. Additionally or alternatively, the system may encode the audio watermark using a binary sequence of positive and negative values, which may be used as a shared key for encoding/decoding the audio watermark. The audio watermark can be embedded in output audio data to enable wakeword suppression (e.g., avoid cross-talk between devices) and/or local signal transmission between devices in proximity to each other.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: March 16, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Yuan-Yen Tai, Mohamed Mansour, Parind Shah
  • Patent number: 10944608
    Abstract: Disclosed are a method for transmitting and receiving, between a terminal and a base station, a control channel including control information, and a device for supporting the same. Particularly, disclosed in the present invention are: a method for transmitting and receiving a control channel, if a subcarrier spacing or fast Fourier transform (FFT) size of the control channel including control information is different from the subcarrier spacing or FFT size of a data channel including data; and a device for supporting the same.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: March 9, 2021
    Assignee: LG ELECTRONICS INC.
    Inventors: Kijun Kim, Eunsun Kim, Suckchel Yang, Sangrim Lee
  • Patent number: 10944522
    Abstract: An orthogonal frequency division multiple access (OFDMA) frame tone allocation includes a 256 tone payload consisting of 228 data and pilot tones and 28 null tones. The 28 null tones consist of guard tones and at least one direct current (DC) tone. In one example, the 256 tone payload consists of 224 data tones, 4 common pilot tones, and 28 null tones. In another example, the 256 tone payload consists of 222 data tones, 6 common pilot tones, and 28 null tones. In yet another example, the 256 tone payload may consist of 220 data tones, 8 common pilot tones, and 28 null tones. The OFDMA frame may be a downlink OFDMA frame or an uplink OFDMA frame.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: March 9, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jung Hoon Suh, Osama Aboul-Magd
  • Patent number: 10944496
    Abstract: Systems and methods for canceling carrier frequency offset (CFO) and sampling frequency offset (SFO) in a radio receive chain are disclosed. In one embodiment, a method is disclosed, comprising: receiving a sub-frame via a radio receive chain in a time domain; performing per-user filtering on the sub-frame to obtain a signal for a particular user; obtaining a CFO correction signal; adding the CFO correction signal in the time domain to perform a CFO correction step on the signal for the particular user; performing an FFT on the output of the CFO correction step to obtain samples in a frequency domain; adding an SFO correction signal in the frequency domain to perform an SFO correction to the output of FFT step; and demodulating the output of SFO correction step, thereby performing CFO and SFO correction while reducing inter-carrier interference (ICI).
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: March 9, 2021
    Assignee: PhasorLab, Inc.
    Inventors: Jian Cui, Joshua C. Park, Paul McFarthing
  • Patent number: 10945259
    Abstract: Embodiments of this application provide a data transmission method, a terminal device and a network device, to reduce complexity of blindly detecting a PDCCH by the terminal device. The method includes: receiving by a terminal device, an SFI sent by a network device; determining, by the terminal device according to the SFI, at least one of a slot format in one time unit and a time length suitable for the slot format; and detecting, by the terminal device, a PDCCH according to the slot format corresponding to the one of the one or more slot format indices indicated by the SFI.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: March 9, 2021
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventor: Hai Tang
  • Patent number: 10939325
    Abstract: A system and method to establish and maintain a connection between devices, which in one example embodiment of a method, may comprise receiving a request to establish a connection between a first communication device and a second communication device. A determination is made as to whether the second communication device is reachable via a data network. Based on the determination that the second communication device is reachable over the data network, a connection between the first communication device and the second communication device is established via the data network. Based on the determination that the second communication device is not reachable over the data network, a connection between the first communication device and the second communication device is established via a telecommunications network. Additional systems and methods are described.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: March 2, 2021
    Assignee: eBay Inc.
    Inventor: Vesa Juhani Hukkanen
  • Patent number: 10932155
    Abstract: In the present invention, data generated from a source unit are distributed to at least one bandwidth; the data distributed to the respective bandwidths are encoded in order to perform an error correction; the encoded data are distributed to at least one antenna; a subcarrier is allocated to the data distributed to the respective antennas, and an inverse Fourier transform is performed; a short preamble and a first long preamble corresponding to the subcarrier are generated; a signal symbol is generated according to a data transmit mode; and a frame is generated by adding a second long preamble between the signal symbol and a data field for the purpose of estimating a channel of a subcarrier which is not used.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: February 23, 2021
    Inventors: Hee-Jung Yu, Taehyun Jeon, Myung-Soon Kim, Eun-Young Choi, Sok-kyu Lee, Deuk-Su Lyu
  • Patent number: 10931023
    Abstract: This invention presents embodiments of a coupler array to couple the RF signals between the antenna array of a MIMO base station and a MIMO RF channel emulator. The embodiments enable testing of a large scale MIMO wireless communication system without the need of connecting a large number of RF cables to the antenna ports of the MIMO base station.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: February 23, 2021
    Assignee: RF DSP Inc.
    Inventors: Ping Liang, Dengkui Zhu
  • Patent number: 10924318
    Abstract: Disclosed is a blind authentication method for a frequency selective fading channel based on belief propagation. The method includes: transmitting carrier signals to a frequency selective fading channel with multiple paths, where each carrier signal includes an authentication signal, a pilot signal and an information signal performing BKIC processing on a carrier signal in each path to obtain a target signal, and performing differential signal processing on the target signal to obtain a target authentication signal, obtaining a reference signal based on a key and the pilot signal in each path performing the differential signal processing on the reference signal to obtain a reference authentication signal, and calculating a correlation between the target authentication signal and the reference authentication signal to obtain a test statistic; and comparing the test statistic with a prescribed threshold to determine whether the carrier signal path can pass authentication.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: February 16, 2021
    Assignee: Shenzhen University
    Inventors: Ning Xie, Li Zhang