Patents Examined by Kenneth Lam
  • Patent number: 10298426
    Abstract: There is disclosed a communication cable module including: a conductive cable; a linear amplifier connected to the conductive cable; a detector for detecting presence or absence of an input signal of the conductive cable; a first circuit having a variable-current function; and a second circuit having a common-mode voltage regulating function, wherein when the input signal is not present, the variable-current function of the first circuit reduces an output current of the linear amplifier and the common-mode voltage regulating function of the second circuit regulates an output common-mode voltage of the linear amplifier.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: May 21, 2019
    Assignee: Hitachi Metals, Ltd.
    Inventors: Koji Maeda, Izumi Fukasaku, Masaru Kokubo
  • Patent number: 10200217
    Abstract: A method for adaptively-tuned digital self-interference cancellation includes generating a digital self-interference cancellation signal from a digital transmit signal based on a transform configuration; combining the digital self-interference cancellation signal with a receive signal to form a digital residue signal; generating a composite residue signal from the digital residue signal and the digital transmit signal; and updating the transform configuration based on the composite residue signal.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: February 5, 2019
    Assignee: Kumu Networks, Inc.
    Inventors: Rajendra Tushar Moorti, Jung-Il Choi, Mayank Jain
  • Patent number: 10193609
    Abstract: A method for feeding back CIS includes: dividing a plurality of antenna ports into a plurality of groups of antenna ports; configuring for each group a same intra-group codebook set consisting of a plurality of intra-group precoding matrices, allocating for each group a plurality of different reference signals corresponding to a same reference resource, and configuring for each antenna port in each group a precoded reference signal acquired after a precoding operation using the intra-group precoding matrices, the number of the reference resources corresponding to the number of the intra-group precoding matrices in the intra-group codebook set, and the number of the reference signals corresponding to each reference resource corresponding to the number of groups of inter-group antenna ports; transmitting the precoded reference signal to a UE via each antenna port; and receiving the CSI fed back by the UE after measurement on the reference signal.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: January 29, 2019
    Assignee: China Academy of Telecommunications Technology
    Inventors: Chuanjun Li, Xin Su, Yang Song
  • Patent number: 10164583
    Abstract: A linearized MIMO system which includes a MIMO receiver which comprises one or more receiving units, each receiving unit comprises one or more receiving antennas and an optional MIMO spatial decoder. The linearized MIMO system also includes a linearized MIMO transmitter, which comprises a plurality of non-linear power amplifiers at respective transmission branches, where each of the non-linear power amplifiers feeds a respective antenna with an amplified signal. The linearized MIMO system also includes a MIMO spatial pre-coder for receiving an artificial data signal from a global linearizer, and based on a channel state information of the medium (medium-channel), the linearized MIMO system creates a plurality of transmission branch-signals. Each of the branch signals feeds one of the non-linear power amplifiers, respectively. The global linearizer receives a data signal and creates the artificial data signal.
    Type: Grant
    Filed: March 13, 2016
    Date of Patent: December 25, 2018
    Assignee: B.G. Negev Technologies and Applications Ltd., at Ben-Gurion University
    Inventors: Dov Wulich, Ilia Iofedov
  • Patent number: 10158403
    Abstract: The present disclosure relates to a method performed in a radio device for transmitting a multi-carrier waveform comprising multi-carrier symbols. The method comprises precoding S2 the time domain waveform of the multi-carrier symbols to a plurality of transmitter antenna elements of the radio device. The precoding S2 comprises switching S2b from using S2a first set of precoder weights to using S2c a second set of precoder weights, different from the first set of weights. The switching S2b is done by use of at least one intermediate set of precoder weights during an interlude between two of the symbols in time domain. The method also comprises transmitting S3 the precoded signal from the transmitter antenna elements.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: December 18, 2018
    Inventor: Robert Baldemair
  • Patent number: 10142004
    Abstract: A method for performing, by a UE, precoding using a codebook in a wireless communication system includes: receiving a reference signal for channel estimation from an eNB; estimating a channel through the received reference signal; determining a precoding matrix related to the estimated channel in a codebook; and feeding back, to the eNB, a precoding matrix index (PMI) corresponding to the determined precoding matrix, wherein the codebook is generated in consideration of at least one of a region to which the UE belongs and the position of the UE.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: November 27, 2018
    Assignees: LG Electronics Inc., Sogang University Research Foundation
    Inventors: Jonghyun Park, Hosik Kang, Junyeub Suh, Wonjin Sung, Kijun Kim
  • Patent number: 10142145
    Abstract: The present invention relates to a method and apparatus for demodulation in a wireless communications system transmitted across a wireless communications channel. The described wireless receiver includes a first antenna for receiving a wireless signal including a symbol transmitted across a wireless communications channel perceived by the first antenna, an observation modifier for generating a modified observation (y) of the symbol based on a product of the received observation (r) and the complex conjugate of a channel estimate (h*), a log-likelihood ratio (LLR) module generating log-likelihood ratios (LLRs) based on the modified observation and the channel estimate, and a maximum-likelihood-based decoder for decoding the symbol based on the LLRs.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: November 27, 2018
    Assignee: Cohda Wireless Pty Ltd.
    Inventor: Paul Dean Alexander
  • Patent number: 10135504
    Abstract: The disclosure provides techniques for sounding sequence protection in multi-user multiple-input-multiple-output (MU-MIMO) communications for wireless local area networks (WLANs). An access point (AP) may select a station (STA) from multiple STAs in a MU-MIMO group. The AP may then transmit a request-to-send (RTS) frame, where the RTS is addressed to the selected STA. The AP may receive a clear-to-send (CTS) frame from the selected station and may perform, in response to receiving the CTS frame, a sounding sequence with the MU-MIMO group. After completion of the sounding sequence, the AP may transmit MU-MIMO data communications to at least one of the STAs in the MU-MIMO group.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: November 20, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Ahmed Ragab Elsherif, Nathaniel David Houghton
  • Patent number: 10122411
    Abstract: A communications device is disclosed, the device includes a container, at least one power module, at least one temperature regulating module, and multiple boards. The container is configured to accommodate the at least one temperature regulating module and the multiple boards, and the container is further configured to accommodate a power bus layer. The power bus layer is connected to the at least one power module, the at least one temperature regulating module, and the multiple boards. The at least one power module is configured to supply power to the at least one temperature regulating module and the multiple boards by using the power bus layer. At least part of communication among the multiple boards, the at least one power module, and the at least one temperature regulating module is performed in a power line communications manner by using the power bus layer.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: November 6, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Changyi Liu, Xudong Fei, Xidong Yao
  • Patent number: 10122348
    Abstract: A multiplexer comprises: an output circuit comprising a multiplexer output; and a first buffer coupled to the output circuit and comprising: a first selection input configured to receive a first selection signal; a first logical input configured to receive a first logical input signal; and a first ground; wherein the multiplexer is configured to: couple the first logical input to the multiplexer output when the first selection signal is a first value; and couple the first logical input to the first ground when the first selection signal is a second value. A method comprises: receiving a selection signal and a first logical input signal; coupling a first logical input to a multiplexer output when the selection signal is a first value; and coupling the first logical input to a ground when the selection signal is a second value.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: November 6, 2018
    Assignee: Futurewei Technologies, Inc.
    Inventors: Liang Gu, Yuming Cao, Gong Lei, Yen Dang, Yifan Gu, Hungyi Lee, Mamatha Deshpande, Shou-Po Shih, Yan Duan
  • Patent number: 10122553
    Abstract: A transmission device may include a main driver configured to drive an output node based on an input signal, and may generate an output signal with multiple levels. The transmission device may include a variable emphasis driver configured to drive the output node with various driving forces based on transition information of the input signal.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: November 6, 2018
    Assignee: SK hynix Inc.
    Inventor: Hae Kang Jung
  • Patent number: 10116367
    Abstract: Multiple-hop relayed directional beam formed wireless communication (mm-wave mesh network) method and apparatus which takes place at the PHY layer. Network capability is enhanced by improving routing protocols between neighboring STAs when communicating from an originating STA, through intermediate STAs, to a destination STA. The routing takes into consideration antenna sector selection to limit interference with neighboring STAs, and channel time utilization to increase throughput. Link metrics and channel times are established for optimizing routing and the determination of intermediate stations between an originating STA and a destination STA. The apparatus and method balances both end-end path link quality and interference impact.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: October 30, 2018
    Inventor: Kazuyuki Sakoda
  • Patent number: 10110399
    Abstract: A circuit with galvanic isolation includes a series of n cascaded transformers including a first transformer and a last transformer in the series. A transmitter is coupled to the primary winding of the first transformer in the series of cascaded transformers, the transmitter being configured for supplying to the primary winding a transmission signal as a function of an input signal. A receiver is coupled to the secondary winding of the last transformer of the series of cascaded transformers and is configured for receiving at the secondary winding a reception signal transmitted over the series of cascaded transformers. A predistortion module is configured for applying to the transmission signal a predistortion including an (n?1)-fold integration, where n is the number of cascaded transformers, of a transmission signal that would be supplied to the input of a sole transformer present in a single-transformer solution.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: October 23, 2018
    Assignee: STMicroelectronics S.r.l.
    Inventors: Alessandro Nizza, Roberto Aletti, Francesco Pulvirenti, Giuseppe Cantone
  • Patent number: 10103777
    Abstract: Aspects of the subject disclosure may include, a system that guides electromagnetic waves that propagate along a transmission medium without requiring an electrical return path, and at least reduces radiation on an outer surface of a structure reducing a flow of an electrical current from an inner surface of the structure to the outer surface of the structure. Other embodiments are disclosed.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: October 16, 2018
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Paul Shala Henry, Thomas M. Willis, III, Giovanni Vannucci
  • Patent number: 10090879
    Abstract: In an ultra-wideband (“UWB”) receiver, a received UWB signal is periodically digitized as a series of ternary samples. 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, a stream of 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”) substantially to filter channel-injected noise. The time of arrival of the first arriving path is developed from the stream of CIR estimates.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: October 2, 2018
    Assignee: Decawave, Ltd.
    Inventors: Michael McLaughlin, Billy Verso, Tony Proudfoot
  • Patent number: 10090969
    Abstract: Aspects of the disclosure provide an apparatus that includes a transceiver circuit and a processing circuit. The transceiver circuit is configured to receive a trigger signal this is transmitted by another apparatus. The trigger signal triggers transmissions by a first group of apparatuses including the apparatus, and defers transmissions by a second group of apparatuses that interfere the transmissions by the first group of apparatuses. The processing circuit is configured to, in response to the trigger signal, generate a frame with a first preamble structure that is different from a second preamble structure that is used by the second group of apparatuses, and provide the generated frame to the transceiver circuit for transmission.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: October 2, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Yakun Sun, Hongyuan Zhang, Liwen Chu, Lei Wang, Jinjing Jiang, Rui Cao, Yan Zhang
  • Patent number: 10079698
    Abstract: Aspects of the disclosure are directed to determining an offset calibration step size of a sample latch. In accordance with one aspect, the disclosure relate to a Decision Feedback Equalizer (DFE) input section including a E sample latch to output a target signal sample; a E sample digital to analog converter coupled to the E sample latch to input a target voltage to the E sample latch; a sample latch to output a signal sample; and a voltage digital to analog converter coupled to the E sample latch and the sample latch to generate a bias voltage, wherein the bias voltage is inputted to the E sample latch and the sample latch. The DFE input section may further include a latch offset decoder to scale the bias voltage and a summing amplifier to receive an analog input waveform to the DFE input section.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: September 18, 2018
    Assignee: QUALCOMM Incorporated
    Inventor: Minhan Chen
  • Patent number: 10070447
    Abstract: A method and apparatus are provided. The method includes receiving reference signal resource elements from a transceiver, determining a channel impulse response (CIR) signal based on the received reference signal resource elements, estimating a coarse value of a FAP of the reference signal resource elements based on the CIR signal, estimating a fine value of the FAP of the reference signal resource elements based on CIR samples around the FAP location, and combining the coarse value estimate and the fine value estimate to determine the FAP estimate.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: September 4, 2018
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Abhik K. Das, Dongwoon Bai, Jungwon Lee
  • Patent number: 10063344
    Abstract: A symbol decision method includes: storing a look-up table (LUT) to a symbol decision circuit; receiving a first signal, and generating a coordinate signal set corresponding to the first signal according to the first signal, wherein the coordinate signal set is located in a first decision region; and reading the LUT according to the coordinate signal set to output a first symbol corresponding to the first signal, wherein the first symbol is a first constellation point corresponding to the first decision region.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: August 28, 2018
    Inventors: Chia-Wei Chen, Yu-Che Su, Tai-Lai Tung
  • Patent number: 10050666
    Abstract: Embodiments of the present invention include systems for determining locations of UWB transmitters. The system (100) includes multiple UWB receivers (104) for receiving a UWB signal (120) emitted by a UWB transmitter (106). Each receiver (104) includes: RF amplifiers (306) arranged in a cascade structure, the RF amplifiers (306) receive and amplify the UWB signal; multiple baseband blocks (308), each of the baseband blocks is coupled to the corresponding RF amplifier (306) and taps an output signal from the corresponding RF amplifier; and a processor (320) coupled to the multiple baseband blocks (308), the processor processes output signals from the multiple baseband blocks (308) to identify the UWB signal (120). The system (100) also includes a server (110) coupled to the multiple receivers (104), the server (110) receives the identified UWB signals from the multiple receivers (104) and determines the location of the UWB transmitter (106) using the identified UWB signals.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: August 14, 2018
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Min Xie