Patents Examined by David B. Lugo
  • Patent number: 10200100
    Abstract: A method by which a base station receives feedback information on beamforming in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: transmitting an omni-directional beam formed uniformly in all directions, on the basis of a non-precoded first signal; transmitting a plurality of directional beams through a plurality of antenna ports on the basis of second signals precoded in different directions; and receiving feedback information from a terminal, wherein the feedback information includes a gain difference between a first directional beam among the plurality of directional beams and the omni-directional beam, and an index of a first antenna port used in transmitting the first directional beam among the plurality of antenna ports.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: February 5, 2019
    Inventors: Kitae Kim, Jiwon Kang, Kilbom Lee, Heejin Kim, Dongkyu Kim
  • Patent number: 10193585
    Abstract: The present disclosure relates to a method and system for tone signal removal from a noisy signal that includes a desired signal in combination with the tone signal. The method and system provides an artificial or estimated undesired tone signal with the same frequency as the undesired tone signal, which, in combination with an estimated phasor, is available to filter or subtract a noisy component from the noisy signal and to provide the filtered or clean desired signal.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: January 29, 2019
    Assignee: SiTune Corporation
    Inventors: Mahdi Khoshgard, Vahid Mesgarpour Toosi, Marzieh Veyseh
  • Patent number: 10164806
    Abstract: A clock data recovery circuit includes; a clock recovery circuit that receives a pseudo random binary sequence (PRBS) pattern and generates a recovery clock by counting edges of the PRBS pattern, and a data recovery circuit that generates recovery data from at least one of the PRBS pattern and externally provided serial data.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: December 25, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jaehyeok Jang
  • Patent number: 10164807
    Abstract: A receiver circuit comprising: an input terminal configured to receive an input-signal; a feedforward-ADC configured to provide a feedforward-digital-signal based on the input-signal; a feedforward-DAC configured to provide a feedforward-analog-signal based on the feedforward-digital-signal; a feedforward-subtractor configured to provide an error-signal based on the difference between the feedforward-analog-signal and the input-signal; an error-LNA configured to provide an amplified-error-signal based on the error-signal; an error-ADC configured to provide a digital-amplified-error-signal based on the amplified-error-signal; a mixer configured to down-convert a signal in a signal path between the input terminal and the error-ADC; and an error-cancellation-block configured to provide an error-cancelled-signal based on a difference between the digital-amplified-error-signal and the feedforward-digital-signal.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: December 25, 2018
    Assignee: NXP B.V.
    Inventors: Muhammed Bolatkale, Lucien Johannes Breems
  • Patent number: 10158392
    Abstract: A transmission-reception device includes an antenna duplexer, an antenna, and first and second transmission-reception circuits. A demultiplexer is connected between the first transmission-reception circuit and the antenna duplexer, and a multiplexer is connected between the second transmission-reception circuit and the antenna duplexer. A signal adjusting unit is connected between the demultiplexer and the multiplexer. The amplitude and phase of a third harmonic signal of a first transmission signal reflected by the antenna are detected. The signal adjusting unit adjusts the amplitude and phase of the third harmonic signal demultiplexed by the demultiplexer on the basis of the detection results, and outputs a cancel signal. The multiplexer synthesizes and hence cancels the third harmonic signal reflected by the antenna and the cancel signal with each other.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: December 18, 2018
    Inventors: Hidenori Obiya, Shinya Mizoguchi, Shinya Hitomi
  • Patent number: 10153805
    Abstract: This invention teaches to the details of an interference suppressing receiver for suppressing intra-cell and inter-cell interference in coded, multiple-access, spread spectrum transmissions that propagate through frequency selective communication channels to a multiplicity of receive antennas. The receiver is designed or adapted through the repeated use of symbol-estimate weighting, subtractive suppression with a stabilizing step-size, and mixed-decision symbol estimates. Receiver embodiments may be designed, adapted, and implemented explicitly in software or programmed hardware, or implicitly in standard RAKE-based hardware either within the RAKE (i.e., at the finger level) or outside the RAKE (i.e., at the user or subchannel symbol level). Embodiments may be employed in user equipment on the forward link or in a base station on the reverse link. It may be adapted to general signal processing applications where a signal is to be extracted from interference.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: December 11, 2018
    Assignee: III HOLDINGS 1, LLC
    Inventors: Tommy Guess, Michael L. McCloud, Vijay Nagarajan, Gagandeep Singh Lamba
  • Patent number: 10148308
    Abstract: An auxiliary channel transceiving circuit includes: a first node and a second node; a first voltage-dividing circuit for generating a first received signal according to a signal from the first node; a second voltage-dividing circuit for generating a second received signal according to a signal from the second node; a first receiver amplifying circuit for amplifying the first received signal to generate a first amplified signal; a second receiver amplifying circuit for amplifying the second received signal to generate a second amplified signal; a comparison circuit for comparing the first amplified signal with the second amplified signal to generate a received signal; a first transmitter amplifying circuit for generating a first output signal according to a transmitting signal; and a second transmitter amplifying circuit for generating a second output signal according to the transmitting signal. The auxiliary channel transceiving circuit is not required to cooperate with traditional capacitors.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: December 4, 2018
    Inventor: Chun-Hao Lai
  • Patent number: 10135602
    Abstract: The present invention provides a method, an apparatus, and a system for time synchronization of an xDSL. The method includes: transmitting, by a customer premises equipment, a first symbol to a central office equipment, and obtaining time Ts2 indicating the moment that the first symbol is transmitted; receiving, by the CPE, a second symbol transmitted by the CO, and obtaining time Ts1 indicating the moment that the second symbol is received; obtaining, by the CPE obtains time Tm2 indicating the moment that the first symbol is received by the CO and time Tm1 indicating the moment that the second symbol is transmitted by the CO; the CPE calculates an offset between a clock of the CPE and a clock of the CO according to Ts1, Ts2, Tm1 and Tm2; and the CPE adjusts the clock of the CPE according to the offset to achieve synchronization.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: November 20, 2018
    Inventors: Guijin Xu, Guozhu Long, Ruijie Xiao, Zhilei Zhao, Xuyong Wu, Yuchen Jia
  • Patent number: 10129071
    Abstract: The present disclosure provides a symbol synchronization method and apparatus. By means of the symbol synchronization method and apparatus, a timing location is adjusted outside an adaptive loop. In addition, the adaptive loop proceeds to according to an original function of the adaptive loop. That is, the timing location is stabilized to an initial symbol-synchronization location, and the timing location is then further corrected and adjusted. Therefore, impact of an error of a timing location on symbol synchronization is eliminated by correcting the timing location, and positioning accuracy of a symbol-synchronization location is improved.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: November 13, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xiaodong Li, Qiao Liu
  • Patent number: 10128881
    Abstract: A time to digital converter has a counter, a first phase difference detector, a first capacitor, a second capacitor having capacitance N times a capacitance of the first capacitor, a comparator to compare a charge voltage of the first capacitor with a charge voltage of the second capacitor, a first charge controller, a first phase difference arithmetic unit, a second phase difference detector, a second charge controller, a second phase difference arithmetic unit to operate the phase difference between the first signal and the second signal, and a third phase difference arithmetic unit to detect a fractional phase difference between the first signal and the second signal. The first phase difference arithmetic unit operates the phase difference between the first signal and the second signal, based on a reference phase, when the counter suspends a measurement operation.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: November 13, 2018
    Inventors: Satoshi Kondo, Akihide Sai, Tuan Thanh Ta, Hidenori Okuni, Masanori Furuta, Tetsuro Itakura
  • Patent number: 10122391
    Abstract: Systems and method provided herein relate to reducing distortion of signals introduced by components on a phase path of a radio frequency system polar architecture. To reduce phase path distortion, a pre-distortion is introduced prior to a distortion caused by the components on the phase path. The pre-distortion in conjunction with the component distortion results in a transmission signal that forms its expected shape.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: November 6, 2018
    Assignee: Apple Inc.
    Inventors: Navid Lashkarian, Ehsan Adabi, Albert Chia-Wen Jerng, Arya Behzad, Ali Parsa
  • Patent number: 10084622
    Abstract: The embodiment of the disclosure discloses a method and device for eliminating Inter-Carrier Interference (ICI) and a computer storage medium. The method for eliminating the ICI includes that: a user frequency offset value is acquired; an order of a filter is determined according to the user frequency offset value; a filter coefficient is constructed according to the order of the filter; user carrier data is received; and ICI elimination is performed on a target subcarrier according to frequency-domain data on adjacent subcarriers of the target subcarrier and filter coefficients of corresponding positions of the adjacent subcarriers, wherein the target subcarrier is any carrier in the user carrier data.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: September 25, 2018
    Assignee: ZTE Corporation
    Inventor: Jidong Wei
  • Patent number: 10079699
    Abstract: Calibrating a Gaussian frequency-shift keying modulation index includes generating a training sequence of bits, shaping a pulse from the training sequence according to an initial modulation index, and converting the shaped signal to a transmission signal. The transmission signal is then either looped through a radio frequency core or processed by frequency deviation estimation hardware to determine a frequency deviation. The frequency deviation is converted to a new modulation index, and potentially a ratio between a target modulation index and a measured modulation index as a scaling factor. The process is then iteratively repeated until a threshold frequency deviation is achieved.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: September 18, 2018
    Inventors: Yan Li, Kai Xie, Hongwei Kong, Jie Lai, Kamesh Medapalli
  • Patent number: 10075321
    Abstract: A system combining OFDM standard modulation with a superimposition of Orbital Angular Momentum modes, each OAM modes consisting in an overlapping decimated IFFTs with the main mode standard OFDM signal. Orthogonality of the OAM modes is assessed. A frame structure embodying both main mode OFDM samples and overlapping OAM modes is proposed.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: September 11, 2018
    Assignee: EUTELSAT S A
    Inventors: Jacques Dutronc, Antonio Saitto
  • Patent number: 10075210
    Abstract: In an ultra-wideband (“UWB”) receiver, a received UWB signal is periodically digitized as a series of ternary samples. During a carrier acquisition mode of operation, the samples are continuously correlated with a predetermined preamble sequence to develop a correlation value. When the value exceeds a predetermined threshold, indicating that the preamble sequence is being received, estimates of the channel impulse response (“CIR”) are developed. When a start-of-frame delimiter (“SFD”) is detected, the best CIR estimate is provided to a channel matched filter (“CMF”). During a data recovery mode of operation, the CMF filters channel-injected noise from the sample stream. Both carrier phase errors and data timing errors are continuously detected and corrected during both the carrier acquisition and data recovery modes of operation. The phase of the carrier can be determined by accumulating the correlator output before it is rotated by the carrier correction.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: September 11, 2018
    Assignee: Decawave, Ltd.
    Inventors: Gavin Marrow, Michael McLaughlin, Ciaran McElroy
  • Patent number: 10063281
    Abstract: Aspects of the subject disclosure may include, for example, a system that performs operations including detecting a signal degradation of electromagnetic waves guided by a transmission medium, and adjusting at least one phase of signal components of the electromagnetic waves to produce adjusted electromagnetic waves having a hybrid wave mode and a non-optical frequency range to mitigate the signal degradation. Other embodiments are disclosed.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: August 28, 2018
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Paul Shala Henry, Robert Bennett, Farhad Barzegar, Irwin Gerszberg, Donald J. Barnickel, Thomas M. Willis, III
  • Patent number: 10044533
    Abstract: A method (200) of bias cancellation for a radio channel sequence includes: receiving (201) a radio signal, the radio signal comprising a radio channel sequence coded by a first signature, the first signature belonging to a set of orthogonal signatures; decoding (202) the radio channel sequence based on the first signature to generate a decoded radio channel sequence; decoding (203) the radio channel sequence based on a second signature, wherein the second signature is orthogonal to the signatures of the set of orthogonal signatures, to generate a bias of the radio channel sequence; and canceling (204) the bias of the radio channel sequence from the decoded radio channel sequence.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: August 7, 2018
    Assignee: Intel IP Corporation
    Inventors: Thomas Esch, Edgar Bolinth, Markus Jordan, Tobias Scholand, Michael Speth
  • Patent number: 10044406
    Abstract: A transceiver to communicate in a vehicle via a single twisted-pair Ethernet cable includes a transmitter and a receiver, an analog front end, an equalizer, and a controller. The transmitter transmits signals via the single twisted-pair Ethernet cable. The receiver receives signals via the single twisted-pair Ethernet cable. The analog front end receives a first signal received by the transceiver via the single twisted-pair Ethernet cable and outputs a second signal. The equalizer includes a notch filter to cancel electromagnetic interference from the second signal. The controller makes a frequency response of the equalizer independent of the electromagnetic interference by controlling tap values of the notch filter. The controller controls gain of one or more of the analog front end and the equalizer based on the frequency response of the equalizer.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: August 7, 2018
    Inventors: Shaoan Dai, Kok-Wui Cheong, Zhenzhong Gu, Junqing Sun, Meng Zeng, Xing Wu
  • Patent number: 10033444
    Abstract: Systems and methods of beam training for hybrid beamforming are disclosed. In some embodiments, a method of operation of a receiver includes identifying multiple sets of beam indices for use with transmissions from a transmitter using hybrid precoding. The method also includes communicating the sets of beam indices to the transmitter for use with transmissions using hybrid precoding and receiving a transmission from the transmitter using one of the sets of beam indices. In some embodiments, each set of beam indices is for a different transmission mode. In this way, a transmission mode may be changed without the need to perform re-training of beams which is typically a time consuming process.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: July 24, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Cagatay Capar, Songnam Hong, Dennis Hui
  • Patent number: 10014992
    Abstract: A method for generating a physical layer (PHY) data unit includes generating a first signal field to include multiple copies of first signal field content, wherein the first signal field content spans one sub-band of a plurality of sub-bands of the PHY data unit, and wherein the multiple copies collectively span the plurality of sub-bands of the PHY data unit; generating a second signal field to include multiple copies of second signal field content, wherein the second signal field content spans multiple ones of the plurality of sub-bands of the PHY data unit, and wherein the multiple copies of the second signal field collectively span the plurality of sub-bands of the PHY data unit; generating a preamble of the PHY data unit to include at least the first signal field and the second signal field; generating the PHY data unit to include at least the preamble.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: July 3, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Yakun Sun, Lei Wang, Jinjing Jiang, Liwen Chu, Hongyuan Zhang