Patents Examined by Betsy Deppe
  • Digital phase locked loop frequency estimation
    Patent number: 10680619
    Abstract: A Digital Phase Locked Loop (DPLL), including a Time-to-Digital Converter (TDC) configured generate quantized phase values of a controlled oscillator signal; and a frequency estimation circuit configured to receive the quantized phase values, determine wraparound phase of the quantized phase values, and estimate a frequency based on the quantized phase values and the wraparound phase.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: June 9, 2020
    Assignee: Intel IP Corporation
    Inventors: Elan Banin, Roy Amel, Ran Shimon, Ashoke Ravi, Nati Dinur
  • MIMO (multiple-input, multiple-output) inter-stream interference cancellation
    Patent number: 10644766
    Abstract: Apparatuses, methods, and systems for MIMO inter-stream interference cancellation are disclosed. One method includes determining a channel matrix between a plurality of transmitting antennas of a transmitter and a plurality of receiving antennas of a receiver, determining a plurality of channel propagation delays based on a propagation delay between each of the plurality of transmitting antennas and each of the plurality of receiving antennas, determining differences in the plurality of channel propagation delays, preprocessing, by the transmitter, streams of symbols for each transmitting antenna for transmission based on the differences in the plurality of channel propagation delays and based on the channel matrix, and transmitting, by the transmitter, the preprocessed symbol streams through the plurality of transmitting antennas.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: May 5, 2020
    Assignee: Facebook, Inc.
    Inventors: Qi Qu, Sam Padinjaremannil Alex, Ali Yazdan, Abhishek Tiwari, Yan Yan, Hongyu Zhou, Pratheep Bondalapati
  • Space-polarization modulated communications
    Patent number: 10630510
    Abstract: Methods and systems relating to topics in space-polarization modulated communications. The topics include: adaptive space-polarization modulated communications using channel state information at the transmitter; adaptive decision boundaries at the receiver; carrier frequency offset estimation for multi-carrier modulation schemes; transmission of analog images using polarization and coherence dispersion information; and reduction of peak-to-average power ratio in multi-carrier modulation schemes.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: April 21, 2020
    Assignee: UNIVERSITY OF NOTRE DAME DU LAC
    Inventors: Thomas Pratt, Robert Daniel Kossler, Benjamin Strycker, Jeffrey G. Mueller
  • Method for improving digital radio mondiale (DRM) acquisition time
    Patent number: 10608762
    Abstract: A system and method for improving the DRM (Digital Radio Mondiale) signal acquisition time stores the demodulated DRM signal and accesses it from memory in order to avoid the additional time taken in waiting for service description channel (SDC) data. The system includes an antenna to receive a DRM signal. A tuner tunes the frequency of receiver to a desired range. An asynchronous sample rate converter (ASRC) converts the sampling rate of the received signal to a demodulator sampling rate. A demodulator demodulates the received signal. A memory stores the demodulated signal for reuse. A channel splitter splits the received signal into a fast access channel (FAC), a service description channel (SDC), and a main service channel (MSC). A channel decoder decodes the channel split data. A middleware and an application parses and processes the data in order to output the processed data.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: March 31, 2020
    Assignee: INNTOT TECHNOLOGIES PRIVATE LIMITED
    Inventors: Abdul Sameeh Parangodath, Prasanth Padmalayam Thankappan, Amala Mery Shyjy Podimattathil Varghese
  • Method and device for generating received signal strength indication
    Patent number: 10594280
    Abstract: A method can include: generating a first compensation value based on a receiving frequency, where the first compensation value represents attenuations of a wireless signal at different receiving frequencies during transmission to an analog receiving circuit; generating a second compensation value based on an automatic gain control coefficient, where the second compensation value represents gain errors corresponding to different automatic gain control coefficients; and generating a received signal strength indication based on the first and second compensation values, an intermediate frequency signal strength, and a gain of the intermediate frequency signal with respect to a received signal.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: March 17, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Junjie Qiao, Ran Li
  • Apparatus and method for transmitting/receiving signal in multi-carrier system
    Patent number: 10581651
    Abstract: The present invention relates to a 5th-generation (5G) or pre-5G communication system, which is to be provided for supporting a higher data transmission rate after the 4th-generation (4G) communication system, such as long term evolution (LTE). The present invention provides a method for receiving a signal in a multi-carrier system, the method comprising the steps of: performing, with respect to an input signal, a waveform pre-processing operation on the basis of at least one of an equalizing operation and a filtering operation; checking whether the waveform pre-processed signal is a Gaussian proximity signal; and performing soft-de-mapping with respect to the waveform pre-processed signal on the basis of a result of the checking.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: March 3, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyeong-Yeon Kim, Yeo-Hun Yun, Sung-Nam Hong, Chan-Hong Kim, Ji-Yun Seol, Yong-Ho Cho, Ming Hoka
  • Successive interference cancellation and multi-user minimum mean square channel estimation based on soft decoding information
    Patent number: 10484210
    Abstract: An apparatus, such as a base station or a user equipment, includes a transceiver configured to receive a first signal that is a superposition of symbols transmitted concurrently by users in shared resources of an air interface. The apparatus also includes a processor configured to iteratively cancel, for the users, interference produced by the symbols transmitted by other users on the basis of log likelihood ratios (LLRs) that represent likelihoods that previous estimates of the symbols transmitted by the other users are correct. The processor is also configured to iteratively decode the symbols transmitted by the users after canceling the interference produced by the symbols transmitted by the other users.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: November 19, 2019
    Assignees: Alcatel Lucent, Nokia of America Corporation
    Inventors: Marcos Tavares, Dale Douglas Harman, Milan Zivkovic, Juergen Otterbach, Dragan Samardzija
  • Hierarchical beamforming method and system thereof
    Patent number: 10447361
    Abstract: A hierarchical beamforming method is provided, which comprises the following steps. Firstly, the vectors of the transmitter and the receiver are hierarchically indexed by using the codebooks with different coding methodology to generate hierarchical coding structures. Then, the corresponding vector fields between the transmitter and the receiver are switched according to the hierarchical coding structures. Thereafter, at least two aligning vector fields with greatest gain are detected. Finally, the corresponding aligning index pairs are used to build the channels.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: October 15, 2019
    Assignee: NATIONAL TAIWAN UNIVERSITY
    Inventors: Hung-Yi Cheng, An-Yu Wu
  • Dynamic interference suppression for massive multiple-input-multiple-output (MIMO) in unlicensed frequency bands
    Patent number: 10439738
    Abstract: A node is configured to be connected to a massive multiple-input, multiple-output (MIMO) array to provide spatially multiplexed channels to a plurality of user equipment in an unlicensed frequency band. The node includes a processor configured to allocate a number of degrees of freedom of the massive MIMO array to interference suppression based on an outcome of a first listen-before-talk (LBT) operation performed by the node to acquire the unlicensed frequency band. The processor is also configured to generate a spatial filter based on the number of degrees of freedom allocated to interference suppression. The node also includes a transceiver configured to perform a second LBT operation using the spatial filter.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: October 8, 2019
    Assignee: Alcatel Lucent
    Inventors: Adrian J. Garcia Rodriguez, Giovanni Geraci, David Lopez Perez, Lorenzo Galati Giordano, Andrea Bonfante
  • Tailless convolutional codes
    Patent number: 10425108
    Abstract: Certain aspects of the present disclosure relate to techniques and apparatus for increasing decoding performance and/or reducing decoding complexity. An exemplary method generally includes receiving, via a wireless medium, a codeword encoded using a tailless convolutional code (TLCC) with a known start state, evaluating a set of decoding candidate paths through a trellis decoder that originate at the known start state of the TLCC, performing, for each of a plurality of the decoding candidate paths, a back trace from a respective end state to the known start state, and selecting one of the decoding candidate paths based, at least in part, on path metrics generated while performing the back trace. Other aspects, embodiments, and features are also claimed and described.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: September 24, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Jamie Menjay Lin, Yang Yang, Joseph Binamira Soriaga
  • Preamble symbol receiving method and device
    Patent number: 10411929
    Abstract: Provided are a preamble symbol receiving method and a receiving device, characterized in that: the received preamble symbol contains a time-domain symbol which is generated from a single three-segment structure by a transmitting end according to a predefined generation rule, the single three-segment structure containing: a time-domain main body signal, a prefix generated based on the entirety or a portion of the time-domain main body signal, and a postfix or a hyper prefix generated based on the entirety or a portion of the time-domain main body signal. Therefore, using the entirety or a portion of a certain length of a time-domain main body signal as a prefix, it is possible to implement coherent detection, which solves the issues of performance degradation with non-coherent detection and differential decoding failure under complex frequency selective fading channels.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: September 10, 2019
    Assignee: Shanghai National Engineering Research Center of Digital Television Co., Ltd.
    Inventors: Ge Huang, Hongliang Xu, Guanbin Xing, Wenjun Zhang, Yunfeng Guan, Dazhi He
  • Method and device for mitigating inter-cell interference
    Patent number: 10389466
    Abstract: The present invention provides a method for mitigating inter-cell interference. To this end, the present invention includes a second signal transmission step in which, when a transmission symbol to be transmitted to a first receiver is S and a transmission symbol to be transmitted to a second receiver is Z, a symbol S2k (k is an integer) is transmitted to the first receiver through a first transmission antenna according to a first pattern, a symbol S2k* is transmitted to the first receiver through a second transmission antenna, a symbol S2k+1 is transmitted to the first receiver through a third transmission antenna, a symbol S2k+1* is transmitted to the first receiver through a fourth transmission antenna, and symbols Z4k to Z4k+3 and symbols Z4k* to Z4k+3* are transmitted to the second receiver through fifth to eighth transmission antennas according to a second pattern different from the first pattern.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: August 20, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Kungmin Park, Heejeong Cho, Hyunsoo Ko, Hyeyoung Choi, Ilmu Byun
  • Amplitude demodulators and related methods
    Patent number: 10374848
    Abstract: A circuit for demodulating an input signal is described. The circuit may be configured to demodulate signals modulated with amplitude-based modulation schemes, such as amplitude shift keying (ASK), such that information is encoded in the amplitude of the signals. The circuit may comprise an amplitude detector for extracting the envelope of a received amplitude-modulated signal, a phase/frequency detector for detecting phase and/or frequency shifts, and a selector configured to select one between the output of the amplitude detector and the output of the phase/frequency detector. The selector may be controlled by a control circuit including a delay unit.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: August 6, 2019
    Assignee: MEDIATEK Singapore Pte. Ltd.
    Inventors: Tieng Ying Choke, Hon Cheong Hor
  • Systems and methods to provide upconverting with notch filtering
    Patent number: 10348528
    Abstract: A system includes: a baseband phase generator configured to receive differential in-phase (I) and quadrature (Q) signals and configured to output N phase-shifted baseband signals, wherein N is greater than 4, further wherein the baseband phase generator comprises a plurality of notch filters configured to receive the I and Q signals; and an upconverter configured to receive the phase-shifted baseband signals, to perform mixing on the phase-shifted baseband signals, and to output a differential upconverted signal.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: July 9, 2019
    Assignee: QUALCOMM Incorporation
    Inventors: Ayush Mittal, Bhushan Shanti Asuri, Krishnaswamy Thiagarajan, Sameer Vasantlal Vora, Mahim Ranjan
  • Method for transmitting signal through high-frequency band in wireless communication system, and apparatus therefor
    Patent number: 10320460
    Abstract: A method for a transmitting end transmitting a signal to a receiving end in a wireless communication system is provided. The method includes receiving, from the receiving end, information on a first precoder and a second precoder which are for a channel between the transmitting end and the receiving end and transmitting a signal to the receiving end based on the first precoder where the signal is transmitted to the receiving end based on the second precoder if the receiving performance of the receiving end based on the first precoder is greater than or equal to a threshold value.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: June 11, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Kitae Kim, Heejin Kim, Kukheon Choi, Jiwon Kang, Kilbom Lee
  • Method of generating reference signal in wireless communication system
    Patent number: 10298376
    Abstract: A method of generating a reference signal includes acquiring a base sequence and acquiring a reference signal sequence with a length N from the base sequence. Good PAPR/CM characteristics of the reference signal can be kept to enhance performance of data demodulation or uplink scheduling.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: May 21, 2019
    Assignee: Optis Cellular Technology, LLC
    Inventors: Seung Hee Han, Minseok Noh, Daewon Lee
  • Transmission modes and signaling for uplink MIMO support or single TB dual-layer transmission in LTE uplink
    Patent number: 10291303
    Abstract: An apparatus for mapping data in a wireless communication system. The apparatus includes circuitry for generating a precoding matrix for multi-antenna transmission based on a precoding matrix indicator (PMI) feedback from at least one remote receiver where the PMI indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first code book and a second codebook. The apparatus further includes circuitry for precoding one or more layers of a data stream with the precoding matrix and transmitting the precoded layers of data stream to the remote receiver.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: May 14, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Eko N. Onggosanusi, Runhua Chen
  • Systems and techniques for communication using multiple-input-multiple-output processing of orbital angular momentum modes
    Patent number: 10291300
    Abstract: A system includes a transmitter having a first transmit device having a first transmit antenna and a first OAM multiplexer designed to receive two input signals and to convert the input signals to orthogonal OAM beams. The first transmit antenna is designed to transmit a first output signal that includes the OAM beams. The transmitter also includes a second transmit device that functions in a similar manner as the first transmit device. A receiver includes a first receive device having a first receive antenna designed to receive the first output signal and a first OAM demultiplexer designed to convert the first output signal to received signals corresponding to the input signals. The receiver also includes a second receive device having similar features as the first receive device. The receiver also includes a MIMO processor designed to reduce interference between the received signals.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: May 14, 2019
    Assignee: UNIVERSITY OF SOUTHERN CALIFORNIA
    Inventors: Alan E. Willner, Yongxiong Ren, Long Li
  • Clock and frame synchronization carried as a single composite signal allows the use of a single transmission line with a narrower bandwidth
    Patent number: 10284358
    Abstract: An embodiment generates a composite high speed clock with embedded frame synchronization using simple digital encoding of a high speed reference clock. The high speed reference clock and self-aligned frame synchronization signal are recovered by standard logic gate circuitry. The encoding and decoding circuits are comprised of basic digital logic gates with low propagation delay skew and timing jitter. The encoded clock is easier to transmit from source unit to destination unit over common transmission media (i.e., digital transceivers, amplifiers, splitters, connectors and coaxial cable) because only a single interface is required and because the encoding scheme reduces the composite clock to a minimal transmission bandwidth with constrained waveform harmonic content, relative to a low frequency frame sync with fast rise time that requires a broadband transmission media.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: May 7, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Cyrus Dhalla, Jonathan Krauss, Scott M. Takahashi, Gerald R. Fischer, Douglas S. Cockfield, Akop Gazdzhyan
  • Apparatus and method for coarse timing and frequency synchronization
    Patent number: 10257012
    Abstract: The apparatus includes a plurality of correlation processors configured to each receive a group of samples and generate correlations of each group of samples; a plurality of multipliers each configured to multiply the correlations of one of the plurality of correlation processors by a weight, wherein the weight of at least one of the plurality of multipliers is different from the weight of at least another one of the plurality of multipliers; a summation processor configured to sum the weight multiplied correlations of the plurality of multipliers for time n, where n is an integer; and a coarse timing and coarse frequency processor configured to generate a coarse timing and a coarse frequency based on the sum.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: April 9, 2019
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Xiaoqiang Ma, Hongbing Cheng, Linbo Li, Jungwon Lee