Patents Examined by Khai Tran
  • Patent number: 10284248
    Abstract: An RF front-end circuit of an RF transceiver is described herein. In accordance with one exemplary embodiment, the fronted circuit includes a local oscillator (LO) configured to generate an RF transmit signal, an RF output port coupled to the local oscillator, wherein the RF transmit signal is output at the RF output port, and a monitoring circuit receiving an input signal and configured to determine the phase of the input signal or the power of the input signal or both. A directional coupler is coupled to the RF output port and configured to direct a reflected signal incoming at the RF output port as input signal to the monitoring circuit, and a controller is configured to detect, based on the determined phase or power or both, a defect in a signal path operably connected to the RF output port.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: May 7, 2019
    Assignee: Infineon Technologies AG
    Inventors: Helmut Kollmann, Jochen O. Schrattenecker, Florian Starzer
  • Patent number: 10284397
    Abstract: A system and method for Feed Forward Equalizer (FFE)-Aided Clock Data Recovery (CDR) to calibrate phase offset and enhance gain in baud rate sampling phase detector is provided. In an embodiment, a clock data recovery (CDR) apparatus includes an incremental feed forward equalizer (INC-FFE) in a CDR path and a calibration component in an equalization path, the calibration component connected to the INC-FFE, the calibration component configured to adjust FFE coefficients for the INC-FFE according to a phase code (PC) index in a PC index table and one of a signal-to-noise-ratio (SNR) and a bit error rate (BER) of a sampled signal, wherein the PC index table comprises adjustment values for the FFE coefficients, and wherein the PC index is linearly related to a sampling phase.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: May 7, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yuchun Lu, Henry Wong, Davide Tonietto
  • Patent number: 10277441
    Abstract: Methods, systems, and devices for improving uniformity between levels of a multi-level signal are described. Techniques are provided herein to unify peak-to-peak voltage differences between the amplitudes of data transmitted using multi-level signaling. Such multi-level signaling may be configured to increase a data transfer rate without increasing the frequency of data transfer and/or a transmit power of the communicated data. An example of multi-level signaling scheme may be pulse amplitude modulation (PAM). Each unique symbol of the multi-level signal may be configured to represent a plurality of bits of data.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: April 30, 2019
    Assignee: Micron Technology, Inc.
    Inventor: Timothy M. Hollis
  • Patent number: 10276907
    Abstract: Aspects of the subject disclosure may include, for example, a cable can include a core, a plurality of strips of cladding disposed on the core, and a coupler that facilitates inducing electromagnetic waves that propagate along the core, where a first dielectric constant of the core exceeds a second dielectric constant of each strip of cladding of the plurality of strips of cladding, and where the electromagnetic waves propagate along the core without requiring an electrical return path. Other embodiments are disclosed.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: April 30, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Robert Bennett, Aldo Adriazola, Mitchell Harvey Fuchs, Brandon Pimm, Farhad Barzegar, Irwin Gerszberg, Paul Shala Henry, William Scott Taylor, Donald J. Barnickel, Thomas M. Willis, III
  • Patent number: 10277292
    Abstract: Radio network node and method therein, for communication in a wireless communication system. The radio network node comprises: a plurality of antenna elements, forming an antenna array; a plurality of transceivers, each transceiver coupled to at least one dedicated antenna element of the antenna array; and a controller configured to adjust a first subset of the transceivers to work at a first frequency band, and to adjust a second subset of the transceivers to work at a second frequency band. The first subset of transceivers and the second subset of transceivers (are disjoint and configured to operate at their respective frequency bands simultaneously.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: April 30, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Mats Högberg, Björn Sihlbom, Ulrik Imberg, Tomas Wilhelmsson, Teijo Henrikki Lehtinen, Yajun Jiang
  • Patent number: 10257002
    Abstract: A microelectromechanical resonant switch (“resoswitch”) converts received radio frequency (RF) energy into an output signal with zero quiescent power usage by using a resonant element with a passband input sensitivity of: <?60 dBm, <?68 dBm, and <?100 dBm. The resoswitch first accepts incoming amplitude- or frequency-shift keyed RF energy at a carrier frequency, filters it, provides power gain via resonant impact switching, and finally envelop detects impact impulses to demodulate and recover the modulating waveform. Mechanical gain may be used to amplify received signals, whose amplitudes may be binned, thereby preserving use of amplitude modulated (AM) signals. A second resoswitch may be used to control additional circuitry, whereby the first resoswitch detects a control signal output to the additional circuitry.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: April 9, 2019
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Clark T.-C. Nguyen, Wei-Chang Li, Ruonan Liu
  • Patent number: 10256996
    Abstract: Methods and systems for obtaining improved joint channel estimates for a multi-user, frequency-multiplexed data transmission such as SC-FDMA or OFDM begins by estimating separate contributions of users (and/or other signal sources) to the received signal based on joint frequency domain channel estimates. A reduced data set is obtained by subtracting contributions of one or more users from the received data, leaving only the estimated contributions of the remaining users, with noise and residual estimation error signal. Time domain joint channel estimation is then performed on the reduced data set, which is feasible because the number of users has been reduced. In exemplary embodiments, the reduced data set includes only one estimated user contribution. This process is repeated to obtain channel estimates for all of the users. The method can be repeated by using the channel estimates to re-estimate the user contributions and calculate revised channel estimates.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: April 9, 2019
    Assignee: COLLISION COMMUNICATIONS, INC.
    Inventors: Sagar Dhakal, Sayak Bose, Joseph Farkas, Brandon Hombs
  • Patent number: 10255448
    Abstract: A system includes a transmit equalizer to equalize a data stream using a set of transmit parameters to generate an input signal. The system further includes a communication channel to receive the input signal. The system further includes a receive equalizer to receive an output signal from the communication channel in response to the input signal and detect the data stream from the output signal using a set of receive parameters. The system additionally includes a controller to change the set of transmit parameters in response to a condition, where the transmit parameters, the receive parameters, and the condition are selected to both enable the receive equalizer to detect the data stream from the output signal and reduce the likelihood of an external circuit detecting the data stream from the output signal.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: April 9, 2019
    Assignee: International Business Machines Corporation
    Inventors: Layne A. Berge, Benjamin A. Fox, Wesley D. Martin, George Zettles
  • Patent number: 10250313
    Abstract: A method for channel state information (CSI) feedback by a user equipment (UE) is provided. The method comprises receiving, by the UE from a base station (BS), CSI feedback configuration information to report a covariance matrix indicator (CMI) indicating a N×N channel covariance matrix (K) associated with a downlink channel matrix, wherein N is a number of antenna ports at the BS; identifying, by the UE, the CMI that indicates a set of L basis vectors {ai}, i=0, 1, 2, . . . , L?1, each comprising a dimension N×1, and a set of L2 coefficients, {ci,j}, i,j=0, 1, 2, . . . , L?1, and that represent the covariance matrix (K) as a weighted linear sum {tilde over (K)}=?i=0L-1?j=0L-1ci,jaiajH, wherein L?N and H denotes a Hermitian transpose, and transmitting, by the UE to the BS, the CSI feedback including the identified CMI over an uplink channel.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: April 2, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Md. Saifur Rahman, Eko Onggosanusi
  • Patent number: 10250283
    Abstract: An apparatus for carrier recovery includes a frequency detector. The frequency detector includes a Fast Fourier Transform processor receiving a complex baseband RF input signal and outputting at least one positive frequency bin output and at least one negative frequency bin output. The frequency detector includes a first accumulator receiving directly or indirectly the at least one positive frequency bin output and outputting a positive frequency band energy estimate. The frequency detector includes a second accumulator receiving directly or indirectly the at least one negative frequency bin output and outputting a negative frequency band energy estimate. The frequency detector includes a subtractor receiving the positive frequency band energy estimate and the negative frequency band energy estimate and outputting an instantaneous frequency error estimate representing a difference between the positive frequency band energy estimate and the negative frequency band energy estimate.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: April 2, 2019
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventor: Neil Schafer
  • Patent number: 10243632
    Abstract: The present disclosure generally relates to the field of Faster-Than-Nyquist Signaling More specifically, the present disclosure relates to a technique of supporting Faster-Than-Nyquist transmission of data in a Multiple Input Multiple Output environment. A method embodiment comprises: forming two or more spatial data streams from data to be transmitted in the MIMO environment; partitioning a frequency band available for transmission of the data in the MIMO environment over the two or more spatial data streams into two or more sub-bands; and processing each of the two or more spatial data streams using FTN sampling.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: March 26, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventor: Ather Gattami
  • Patent number: 10237016
    Abstract: A receiver, transmitter and system are programmed to communicate based on a signal including a plurality of signal components associated respectively with a plurality of subcarriers over a communications channel. The receiver is programmed to determine, from the plurality of subcarriers, a subcarrier subject to interference and erase the signal component associated with the subcarrier subject to interference. The receiver is further programmed to reconstruct the signal based on the plurality of first signal components excluding the erased first signal component.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: March 19, 2019
    Assignee: Hughes Network Systems, LLC
    Inventors: Bassel F. Beidas, Rohit Iyer Seshadri, Lin-Nan Lee, Liping Chen
  • Patent number: 10218551
    Abstract: A device includes a frequency offset (FO) compensation circuit coupled with a decoder, and a soft information measurement circuit. The frequency offset compensation circuit is configured to: (i) receive a continuous phase modulation (CPM) signal, (ii) adjust the CPM signal in a sampling window based on a frequency offset compensation value, and (iii) provide the adjusted CPM signal to the decoder. The decoder is configured to: (i) receive the adjusted CPM signal generated by the FO compensation circuit, (ii) decode the adjusted CPM signal to obtain one or more information symbols associated with the CPM signal, (iii) provide the one or more information symbols for soft information generation; and (iv) receive soft information provided by the soft information measurement circuit.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: February 26, 2019
    Assignee: Marvell International Ltd.
    Inventors: Ankit Sethi, Vijay Ganwani
  • Patent number: 10218424
    Abstract: A method is provided including transmitting a reference signal on a downlink beam to a UE; receiving from the UE a reference signal sequence; determining from the received reference signal sequence at least a preferred uplink beam to pair with the downlink beam; sending downlink signaling to the UE on at least the downlink beam; and receiving uplink signaling from the UE on at least the preferred uplink beam. A further method is provided including receiving a reference signal from a network on a downlink beam; selecting at least one preferred uplink beam to match the downlink beam; selecting a reference signal sequence that corresponds to the selected at least one preferred uplink beam; transmitting the selected reference signal sequence to the network; receiving downlink signaling from the network on at least the downlink beam; and transmitting uplink signaling to the network on the at least one preferred uplink beam.
    Type: Grant
    Filed: January 3, 2018
    Date of Patent: February 26, 2019
    Assignee: Nokia Technologies Oy
    Inventors: Mihai Enescu, Yi Zhang, Deshan Miao, Yuantao Zhang
  • Patent number: 10218464
    Abstract: Embodiments relate to a method for generating a second data packet for a second network layer from a first data packet including a first header portion with information related to a first network layer higher than the second network layer. The method comprises generating, based on the first header portion, a second header portion including information related to the second network layer and generating a payload portion including the first data packet. The method further comprises generating the second data packet for the second network layer by linking the second header portion and the payload portion.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: February 26, 2019
    Assignee: Alcatel Lucent
    Inventors: Fred Buchali, Laurent Schmalen, Roman Dischler, Ulrich Gebhard
  • Patent number: 10211902
    Abstract: An antenna system includes a plurality of true time delay (TTD) modules, each having a plurality of switching elements configured to selectively define alternative RF signal transmission paths between a signal input and a signal output of the TTD module. A controller is programmed to control the plurality of TTD modules to steer a beam according to a make-before-break switching technique by closing a first pair of switching elements within at least a subset of the plurality of TTD modules to activate a first RF signal transmission path; closing a second pair of switching elements of the subset of the plurality of TTD modules to activate a second RF signal transmission path in parallel with the first RF transmission path; and opening the first pair of switching elements of the subset of TTD modules after closing the second pair of switching elements.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: February 19, 2019
    Assignee: General Electric Company
    Inventors: Joseph Alfred Iannotti, Marco Francesco Aimi
  • Patent number: 10205495
    Abstract: A method and a device for determining parameters of a precoder in a wireless communication system are disclosed. According to one aspect, a method includes selecting a subset of beams corresponding to a plurality of orthogonal beams; obtaining power levels of the selected subset of beams for generating a first factor of the precoder and obtaining phases of the selected subset of beams for generating a second factor, wherein the first factor and the second factor are part of the parameters of the precoder.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: February 12, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Sebastian Faxér, Svante Bergman
  • Patent number: 10187237
    Abstract: An apparatus and method for broadcast signal frame using layered division multiplexing are disclosed. An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a combiner configured to generate a multiplexed signal by combining a core layer signal and an enhanced layer signal at different power levels; a power normalizer configured to reduce the power of the multiplexed signal to a power level corresponding to the core layer signal; a time interleaver configured to generate a time-interleaved signal by performing interleaving that is applied to both the core layer signal and the enhanced layer signal; and a frame builder configured to generate a broadcast signal frame including a preamble for signaling, type information of Physical Layer Pipes (PLPs) and time interleaver information shared by the core layer signal and the enhanced layer signal.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: January 22, 2019
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jae-Young Lee, Sung-Ik Park, Sun-Hyoung Kwon, Heung-Mook Kim
  • Patent number: 10177952
    Abstract: An all-digital software-only modem using distributed processing resources of cloud computing is provided. In particular, all processes that were previously supported by purpose built software, firmware, Field Programmable Gate Array (FPGA) hardware description language (HDL) firmware, and an Application Specific Integrated Circuit (ASIC) are in the instant disclosure supported entirely by a High Performance Computing (HPC) server inside a cloud computing environment.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: January 8, 2019
    Assignee: FAST FIT TECHNOLOGIES, LLC
    Inventors: Michael Beeler, Kasra Toyserkani
  • Patent number: 10177824
    Abstract: A signal processing method and a related device are provided. The signal processing method includes: determining that there are N directions for received signals corresponding to a same signal source; configuring beam directions of an antenna as the N directions; estimating delays of the N received signals received by using the antenna, and separately performing, by using the estimated delays of the N received signals, delay compensation on the N received signals to obtain N received signals obtained after delay compensation, where the N received signals are in a one-to-one correspondence with the N directions, and N is an integer greater than 1; and performing combining processing on the N received signals obtained after delay compensation. The technical solutions in embodiments of the present invention help increase a signal reception gain in a multipath scenario.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: January 8, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Zihuan Chen, Kun Li, Hao Long