Patents Examined by Janice Tieu
  • Patent number: 10148480
    Abstract: Methods and apparatus for processing multichannel signals in a multichannel receiver are described. In one implementation, a plurality of demodulators may provide a plurality of outputs to a processor, with the processor then simultaneously estimating noise characteristics based on the plurality of outputs and generating a common noise estimate based on the plurality of outputs. This common noise estimate may then be provided back to the demodulators and used to adjust the demodulation of signals in the plurality of demodulators to improve phase noise performance.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: December 4, 2018
    Assignee: Maxlinear, Inc.
    Inventors: Curtis Ling, Timothy Gallagher
  • Patent number: 10142042
    Abstract: A first semiconductor die may comprise an interface circuit and a demodulation circuit. The interface circuit may be operable to receive an externally generated signal and recover decisions of a symbol de-mapper carried in the externally generated signal. The demodulation circuit may be operable to recover one or more transport streams based on the decisions of the symbol de-mapper. The first semiconductor die may comprise circuitry operable to combine a plurality of signals from a plurality of second semiconductor dice, where each of the plurality of signals comprises decisions of a respective one of a plurality of symbol de-mappers.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: November 27, 2018
    Assignee: Radioxio, LLC
    Inventors: Curtis Ling, Timothy Gallagher, Glenn Chang
  • Patent number: 10142149
    Abstract: A method of transmitting a Physical Layer Convergence Procedure (PLCP) frame in a Very High Throughput (VHT) Wireless Local Area Network (WLAN) system includes generating a MAC Protocol Data Unit (MPDU) to be transmitted to a destination station (STA), generating a PLCP Protocol Data Unit (PPDU) by adding a PLCP header, including an L-SIG field containing control information for a legacy STA and a VHT-SIG field containing control information for a VHT STA, to the MPDU, and transmitting the PPDU to the destination STA. A constellation applied to some of Orthogonal Frequency Division Multiplex (OFDM) symbols of the VHT-SIG field is obtained by rotating a constellation applied to an OFDM symbol of the L-SIG field.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: November 27, 2018
    Assignee: WI-FI ONE, LLC
    Inventors: Dae Won Lee, Dong Wok Roh, Byeong Woo Kang, Yong Ho Seok, Yu Jin Noh, Bong Hoe Kim
  • Patent number: 10129059
    Abstract: A multi-amplitude modulation receiver includes a signal coupler block coupled to a mixer array block receiving a first input signal from the signal coupler block and a second input from a LO circuit that provides N overlapping phase signals. Outputs of the N mixer elements are coupled to a baseband filter (BBF) block then to a decision threshold block including decision threshold elements including a signal input and at least one comparator receiving at least one VTH value. A phase ordering and mapper block selects M out of the N phases. A digital logic and control block is coupled to control a filter gain and corner frequency of the BBF block and control the VTH value for the decision threshold block which compares a signal received to the VTH value. Outputs from the decision threshold block are coupled inputs of an M-input decision combiner which provides a single data output.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: November 13, 2018
    Inventors: Sudipto Chakraborty, Vinod Mukundagiri
  • Patent number: 10122397
    Abstract: Circuitry and methods are described for digital signal demodulation. In a configurable receiver, a method includes receiving a radio frequency signal at the configurable receiver, operating the configurable receiver in a first mode, the first mode including providing the radio frequency signal to an amplitude detection circuit to determine an amplitude, providing the radio frequency signal to a phase detection circuit to determine a phase, and providing the amplitude and phase to a coordinate rotation digital computer (CORDIC) logic circuit, and operating the configurable receiver in a low power mode upon receiving an indication to selectively disable the amplitude detection circuit, the low power mode including providing the radio frequency signal to the phase detection circuit to determine the phase, and providing the phase and a predetermined constant value in lieu of the amplitude to the CORDIC logic circuit.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: November 6, 2018
    Assignee: Innophase, Inc.
    Inventors: Yang Xu, Sara Munoz Hermoso
  • Patent number: 10116373
    Abstract: Methods and systems are provided for dynamically adjusting vertical beamforming weights to influence a width of a vertical beam emitted from an antenna. A quantity of users present in a particular geographic area is determined, where the user devices have a line of sight with the antenna and are vertically distributed from other user devices. CQIs are received from the user devices. It is determined that the quantity of user devices is above a maximum threshold of user devices, and the CQIs indicated that channel quality is below a minimum threshold. The amplitude and phase components of the vertical beamforming weight are adjusted to modify the width of the vertical beam emitted from the antenna.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: October 30, 2018
    Assignee: Sprint Communications Company L.P.
    Inventors: Sreekar Marupaduga, Andrew M. Wurtenberger
  • Patent number: 10103829
    Abstract: The present invention provides a method of transmitting broadcast signals. The method includes, formatting input streams into Data Pipe, DP, data; Low-Density Parity-Check, LDPC, encoding the DP data according to a code rate; bit interleaving the LDPC encoded DP data; mapping the bit interleaved DP data onto constellations according to one of QAM (Quadrature Amplitude Modulation), NUQ (Non-Uniform QAM) or NUC (Non-Uniform Constellation); Multi-Input Multi-Output, MIMO, encoding the mapped DP data by using a MIMO encoding matrix having a MIMO encoding parameter; building at least one signal frame by mapping the MIMO encoded DP data; and modulating data in the built signal frame by an Orthogonal Frequency Division Multiplexing, OFDM, method and transmitting the broadcast signals having the modulated data.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: October 16, 2018
    Inventors: Jinyong Choi, Byounggill Kim, Woochan Kim, Jaehyung Kim, Woosuk Ko, Sungryong Hong, Chulkyu Mun, Jaeho Hwang, Jongseob Baek, Kookyeon Kwak, Sangchul Moon
  • Patent number: 10090893
    Abstract: A frequency division multiple antenna distribution includes dividing up a carrier signal between a number of frequencies to create a plurality of sub-carrier signals. Each of the sub-carrier signals is at a different frequency. Each sub-carrier signal is transmitted from a different antenna element of a sub-array of antenna elements to create a sub-array transmission pattern of sub-carrier signals. The sub-array transmission pattern is shifted through a plurality of sub-arrays of an antenna array for different sub-carriers.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: October 2, 2018
    Assignee: Futurewei Technologies, Inc.
    Inventor: Zhengxiang Ma
  • Patent number: 10091035
    Abstract: Systems and methods are described for transmitting data over physical channels to provide a high bandwidth, low latency interface between a transmitting device and a receiving device operating at high speed with low power utilization. Communication is performed using group signaling over sets of four wires using a vector signaling code, where each wire of a set carries a low-swing signal that may take on one of four signal values. Topologies and designs of wire sets are disclosed with preferred characteristics for group signaling communications.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: October 2, 2018
    Assignee: KANDOU LABS, S.A.
    Inventors: John Fox, Brian Holden, Ali Hormati, Peter Hunt, John D. Keay, Amin Shokrollahi, Richard Simpson, Anant Singh, Andrew Kevin John Stewart, Giuseppe Surace, Roger Ulrich
  • Patent number: 10075312
    Abstract: Constant-envelope phase-optimized transmission methods and apparatus are disclosed. An example method includes determining initial values of modulation phases in a first quadrant, the modulation phases associated with binary codes to be transmitted; and optimizing the initial values to second values to enable a product of an objective function to be within a threshold value.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: September 11, 2018
    Assignee: The Boeing Company
    Inventors: Isaac M. Jeng, Brandon M. Jones
  • Patent number: 10056993
    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: December 12, 2016
    Date of Patent: August 21, 2018
    Assignee: DecaWave, Limited
    Inventors: Jeff Clancy, Ciarán McElroy, Michael McLaughlin
  • Patent number: 10039066
    Abstract: This automatic gain control circuit is provided with a variable gain amplifier for amplifying a received signal, has a small circuit size, and makes it possible to reduce the effect of superimposed external noise input within the frequency bandwidth of a received signal. The automatic gain control circuit supplies the output of the variable gain amplifier to an analog/digital converter and comprises: a frequency selection circuit that is connected to the output of the analog/digital converter and that selects a signal within the frequency bandwidth of a received signal, said signal having a narrower bandwidth than the frequency bandwidth; and a control signal generation circuit that generates a control signal for the variable gain amplifier on the basis of the strength of the signal selected by the frequency selection circuit.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: July 31, 2018
    Inventors: Satoko Kawakami, Susumu Kumagai
  • Patent number: 10033518
    Abstract: A source synchronous data transmission system includes a data transmitting device and a data receiving device. A dedicated data line carries a data signal from the data transmission device to the data receiving device. A dedicated clock line carries a modulated clock signal from the data transmission device to the data receiving device. The data transmission device includes a clock data driver configured to encode data into the modulated clock signal by modulating an amplitude of the modulated clock signal. Thus, the clock line of the source synchronous data transmission system carries the clock signal and additional data.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: July 24, 2018
    Inventors: Tapas Nandy, Nitin Gupta
  • Patent number: 10033566
    Abstract: Techniques are disclosed relating to generating and receiving radio frames with multiple portions that have different encoding schemes. An apparatus may include one or more processing elements configured to receive, via a wireless radio, wireless data that includes a plurality of portions that each include multiple orthogonal frequency-division multiplexing (OFDM) symbols. Different ones of the portions have different frequency transform sizes and different sampling rates. The wireless data may also include control data that indicates the frequency transform sizes and sampling rates for the ones of the portions. The apparatus may select, based on the control data and a determined velocity of the apparatus, one or more but not all of the plurality of portions and may decode the selected one or more portions to determine data represented by the OFDM symbols in the selected one or more portions. Different portions of the wireless data may be adapted for decoding by devices moving at different maximum velocities.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: July 24, 2018
    Assignees: Coherent Logix, Incorporated, Sinclair Television Group, Inc.
    Inventors: Michael J. Simon, Kevin A. Shelby, Mark Earnshaw
  • Patent number: 10021736
    Abstract: A method and apparatus for concurrent wireless communications on multiple channels of the same frequency band. A wireless device receives a first data signal via a first transceiver chain while concurrently initiating a transmission of a second data signal via a second transceiver chain of the wireless device. The wireless device suspends updates to one or more tracking loops of the first transceiver chain in response to initiating the transmission of the second data signal. The updates to the one or more tracking loops may be suspended prior to transmitting the second set of data from the second transceiver chain. The wireless device may subsequently resume updates to the one or more tracking loops of the first transceiver chain after completing the transmission of the second data signal.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: July 10, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Olaf Josef Hirsch, Guido Robert Frederiks, Zhanfeng Jia, Youhan Kim, Yixiang Li, Ning Zhang
  • Patent number: 10014896
    Abstract: A technique, as well as select implementations thereof, pertaining to dual receive processing in wireless communications is described. The technique may involve receiving, by a plurality of receive processing modules, an incoming signal from an antenna to provide a plurality of processing results. The technique may also involve generating, by a determination mechanism, a determination output based on the plurality of processing results. The determination output may include either one or more decoding metrics based on a respective processing result from one of the plurality of receive processing modules or a weighted combination of more than one respective processing result from more than one receive processing module of the plurality of receive processing modules. The technique may further involve decoding, by a decoder, the determination output to provide a decoded signal.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: July 3, 2018
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Jangwook Moon, Tze-Ping Low, Craig Burnet
  • Patent number: 10008773
    Abstract: A wireless communication apparatus includes a plurality of phase adjusters configured to adjust the phase of a digital baseband signal d(k) for k=1, 2, . . . , K (K is a natural number equal to or larger than one) and output a plurality of digital signals d1(k), d2(k), dm(k) (m is a natural number equal to or larger than two) having phases different from each other, an i-th converter configured to convert a signal obtained by synthesizing the digital signals di(1), di(2), . . . , di(K) into an analog signal ai for i=1, 2, . . . , m, and a power supply circuit including a first stage circuit, a second stage circuit, . . . , an N-th stage circuit (N is a natural number equal to or larger than one).
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: June 26, 2018
    Inventors: Kenichi Nishikawa, Kazuyuki Ozaki, Masahiko Shimizu
  • Patent number: 10003432
    Abstract: A modulation coding scheme (MCS) is selected i) from a first set of MCSs when the PHY data unit is to be transmitted using a first channel bandwidth, and ii) from a second set of MCSs when the PHY data unit is to be transmitted using a second channel bandwidth. The first set of MCSs corresponds to i) a number of spatial streams, and ii) the first channel bandwidth, the second set of MCSs corresponds to i) the number of spatial streams, and ii) the second channel bandwidth. The second set of MCSs excludes one or more MCSs in the first set of MCSs that will result in a padding-related constraint not being met when the second channel bandwidth is to be used. Information bits are encoded according to the selected MCS, and modulated according to the selected MCS.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: June 19, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Sudhir Srinivasa, Hongyuan Zhang, Rohit U. Nabar
  • Patent number: 9998159
    Abstract: A robust frequency drift tracking receiver. The received signal is translated to an intermediate frequency in the RF stage by a quadrature demodulator, and is then brought into the base band by a digital mixer made by a CORDIC. A base band processing stage allows for a synchronization of the receiver relative to the data frame, to estimate data and to output a counter-reaction signal to the CORDIC, obtained by integration of successive frequency corrections, with a predetermined step.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: June 12, 2018
    Inventor: Francois Dehmas
  • Patent number: 9998315
    Abstract: A method and apparatus for orthogonal frequency division multiplexing (OFDM) modulation includes separating a frequency-domain sequence of complex numbers into a first portion and a second portion that is disjoint with the first portion, each of the first portion and the second portion including a respective half of the complex numbers of the frequency-domain sequence, and generating a time-domain sequence having a real in-phase component that is a function of the first portion only, and an imaginary quadrature-phase component that is a function of the second portion only.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: June 12, 2018
    Assignee: BlackBerry Limited
    Inventor: Shouxing Qu