Patents Examined by Sam K. Ahn
  • Patent number: 10333749
    Abstract: Methods are described allowing a vector signaling code to encode multi-level data without the significant alphabet size increase known to cause symbol dynamic range compression and thus increased noise susceptibility. By intentionally restricting the number of codewords used, good pin efficiency may be maintained along with improved system signal-to-noise ratio.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: June 25, 2019
    Assignee: KANDOU LABS, S.A.
    Inventor: Amin Shokrollahi
  • Patent number: 10333765
    Abstract: Methods and systems for I/Q mismatch calibration and compensation for wideband communication receivers may comprise receiving a plurality of radio frequency (RF) channels, downconverting the received plurality of received RF channels to baseband frequencies, determining and removing average in-phase (I) and quadrature (Q) gain and phase mismatch of the downconverted channels, determining a phase and amplitude tilt of the downconverted channels with removed average I and Q gain and phase mismatch, and compensating for said phase and amplitude tilt I and Q gain and phase mismatch of the downconverted channels. The determined phase tilt may be compensated utilizing a phase tilt correction filter, which may comprise one or more all-pass filters. The average I and Q gain and phase mismatch may be determined utilizing a blind source separation (BSS) estimation algorithm.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: June 25, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Yongtao Wang, Curtis Ling, Timothy Gallagher
  • Patent number: 10313171
    Abstract: A low PAPR sequence design method for a wireless communication system includes the following steps: setting relevant parameters of a designed sequence at first, then carrying out multiple iterations, generating multiple length-designated sequences having elements 0 and 1 and obeying the Bernoulli distribution of designated probability density parameters according to the parameters during primary iteration, screening the generated sequences according to the PAPRs of the sequences, updating the parameters of the next iteration based on the screened sequences, and finally mapping the sequence having the minimum PAPR to obtain a sequence with a low PAPR with elements of ?1 and 1 after terminating the iterations. Compared with the prior art, the present invention allows the design of a sequence with a low PAPR with an arbitrary length, and the sequence only contains +1 and ?1 as elements and has good autocorrelation performance.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: June 4, 2019
    Assignee: ZTE Wavetone Science and Technology Ltd.
    Inventors: Shiwen He, Guangshi Yu, Haiming Wang, Lin Tian, Lyuxi Yang, Jun Zhang
  • Patent number: 10291388
    Abstract: The present application provides a signal demodulation apparatus and method in a closed communication system. The signal demodulation apparatus includes: an analog voltage comparator, configured to convert a received modulated signal into a digital signal, and output the digital signal; and a sampling decider, configured to sample the received digital signal, and acquire a value represented by the digital signal according to a feature of a sampled digital signal to complete a signal demodulation. The present application improves signal-to-noise ratio of pressure detection, reduces power consumption and increases refresh rate. The apparatus and method according to the present application have the advantages of simple structure, easy to implement, small circuit area and low power consumption, and thus are suitable for a scenario imposing strict requirements on the power consumption and area, for example, a wearable device and the like.
    Type: Grant
    Filed: July 30, 2017
    Date of Patent: May 14, 2019
    Inventor: Guangyao Wang
  • Patent number: 10291353
    Abstract: A receiver for receiving data in a broadcast system includes a broadcast receiver that receives, via the broadcast system, a receiver input data stream including plural channel symbols represented by constellation points in a constellation diagram. A demodulator demodulates the channel symbols into codewords and a decoder decodes the codewords into output data words. A broadband receiver obtains redundancy data via a broadband system, the redundancy data for a channel symbol including one or more least robust bits of the channel symbol or a constellation subset identifier indicating a subset of constellation points including the constellation point representing the channel symbol. The demodulator and/or the decoder is configured to use the redundancy data to demodulate the respective channel symbol and to decode the respective codeword, respectively.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: May 14, 2019
    Inventors: Junge Qi, Joerg Robert, Jan Zoellner
  • Patent number: 10277269
    Abstract: A system for phased array signal beam tracking includes a phased array transmitter configurable for transmitting a signal beam at a selected transmit beam angle from a plurality of different transmit beam angles. The system also includes a beam gain angle coding assembly configured for modulation of a gain of the signal beam to produce a resulting gain profile of the signal beam. The resulting gain profile includes offset angle coding that indicates an offset incident angle of the signal beam at a receiving antenna.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: April 30, 2019
    Assignee: The Boeing Company
    Inventor: Gary A Ray
  • Patent number: 10277433
    Abstract: This disclosure relates to data communication networks. An example data communication apparatus includes physical (PHY) layer circuitry that includes transceiver circuitry, decoder circuitry, and a signal analysis unit. The transceiver circuitry receives encoded data symbols via a network link. The received encoded data symbols are encoded using trellis coded modulation (TCM). The decoder circuitry decodes the received encoded data symbols using maximum-likelihood (ML) decoding to map a received symbol sequence to an allowed symbol sequence using a trace-back depth. A trace-back depth value is a number of symbols in the received symbol sequence used by the ML decoding to identify the allowed symbol sequence from the received symbol sequence. The signal analysis unit determines one or more link statistics of the network link, and sets the trace-back depth value according to the one or more link statistics.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: April 30, 2019
    Assignee: Analog Devices Global Unlimited Company
    Inventors: Jacobo Riesco-Prieto, Philip Curran, Michael McCarthy
  • Patent number: 10263739
    Abstract: An apparatus for transmitting broadcast signals includes an encoder to encode service data, a mapper to map the encoded service data, and a time interleaver to interleave the mapped service data. The time interleaver includes a cell interleaver to interleave cells in a FEC block of the mapped service data, where the cell interleaver performs linearly writing the cells in the FEC block into a memory and randomly reading the cells in the FEC block according to a permutation sequence. The permutation sequence varies in every FEC block by using a shift value. The apparatus also includes a block interleaver to interleave the cell interleaved service data, where the block interleaver includes column-wise writing FEC blocks of the cell interleaved service data into a TI memory, and diagonal-wise reading the FEC blocks from the TI memory by skipping a part of cells included in the TI memory, and a convolutional interleaver to interleave the block interleaved service data.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: April 16, 2019
    Inventors: Jongseob Baek, Woosuk Ko, Sungryong Hong
  • Patent number: 10263648
    Abstract: A low cost millimeter wave receiver and method for operating same is disclosed. In one embodiment, the method comprises receiving the first signal, converting the first signal of the first bandwidth into an intermediate frequency band, splitting the converted first signal into N of intermediate signals, each having a bandwidth less than the digital processor bandwidth, wherein N is an integer greater than one, downconverting each of the N intermediate signals to the second frequency band, processing the downconverted plurality of signals with the digital processor to generate N processed signals, upconverting each of the N processed signals to the intermediate frequency band, converting the upconverted signals to the third frequency band, and transmitting the converted signals.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: April 16, 2019
    Inventors: John E. Eng, Frank S. Yu
  • Patent number: 10256959
    Abstract: A method for generating a tone signal (TS) having a tone frequency, f, wherein the method comprises the following steps: supplying (S1) a binary bit stream (BBS) having a mark pattern with a supply bit rate, BR, to a signal filter unit; and filtering (S2) the supplied binary bit stream (BBS) by said signal filter unit to generate the tone signal (TS), wherein the mark pattern of the binary bit stream (BBS) supplied to said signal filter unit is adapted to minimize a ratio of the supply bit rate, BR, to the tone frequency, f, of the generated tone signal (TS).
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: April 9, 2019
    Inventor: Michael Eiselt
  • Patent number: 10250430
    Abstract: The present patent application relates to a transmission method and corresponding receiving methods. The transmission method comprises: selecting K number of data streams for transmission, wherein each data stream comprises one or more data messages; and independently for each data stream k=0, . . . , K?1: encoding and modulating data messages of the kth data stream using a Trellis Coded Modulation, TCM, scheme TCMk, interleaving the encoded and modulated data messages of the k-th data stream by using a stream specific interleaver ?k, scrambling the interleaved data messages of the k-th data stream by using a stream specific scrambling sequence; combining all scrambled data messages of the K number of data streams into at least one transmission signal s(l); and transmitting the at least one transmission signal s(l) over a radio channel of the wireless communication system.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: April 2, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Branislav M. Popovic, Alberto Giuseppe Perotti
  • Patent number: 10237052
    Abstract: Systems and methods disclosed herein provide for effectively eliminating the rotational and static phase skews between the in-phase (I) and quadrature (Q) clocks generated by phase interpolators in decision feedback equalizer based receivers. Embodiments of the systems and methods provide for (i) a ring oscillator that eliminates the rotational phase skews and (ii) a plurality of clock mixers that eliminate the static phase skews.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: March 19, 2019
    Inventor: Christopher George Moscone
  • Patent number: 10225760
    Abstract: A system for evaluating the performance of beam forming antennas based on correlations of signal to noise measurements of individual scattering elements in the antennas. An RF source provides a radio frequency (RF) signal having a first frequency to an input of the antenna. Each of the antenna's scattering elements are individually selectable to emit the RF signal. A bias signal sequentially turns off and on each scattering element while emitting the RF signal. Also, a characteristic of the RF signal emitted by each scattering element is separately measured and each difference between the characteristics are identified and compared to one or more threshold values. A report regarding the differences that exceed the threshold value is provided to a user.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: March 5, 2019
    Assignee: Pivotal Commware, Inc.
    Inventor: Eric James Black
  • Patent number: 10225071
    Abstract: A system may include a clock and data recovery circuit that includes one or more analog components. The system may also include a digital control circuit configured to control the clock and data recovery circuit. The digital control circuit and the clock and data recovery circuit may be formed on a single substrate.
    Type: Grant
    Filed: November 24, 2014
    Date of Patent: March 5, 2019
    Inventor: Jason Y. Miao
  • Patent number: 10225072
    Abstract: Methods, apparatuses, and systems are described related a data receiver circuit having a pair of offset edge samplers to sample a data signal, at an edge sampling time between data samples, with respect to different reference levels. A clock-data recovery (CDR) circuit of the receiver circuit may determine an A-count that corresponds to a number of times the signal level of the data signal at the edge sampling time is between the reference levels of the offset edge samples to provide a signal integrity metric for the receiver circuit. The CDR circuit may dynamically update its settings based on the A-count.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: March 5, 2019
    Inventor: Sleiman Bou-Sleiman
  • Patent number: 10225019
    Abstract: A digital adjusting signal for adjusting a multi-channel SQUID system is transmitted only to a control circuit module including a SQUID channel selected in an embodiment of the present invention and not transmitted to other modules. Accordingly, the digital adjusting signal is prevented from flowing into all SQUID adjusting channels to minimize noise generated by the digital adjusting circuit of the SQUID channel and to stably control the SQUID sensor without malfunction.
    Type: Grant
    Filed: November 29, 2013
    Date of Patent: March 5, 2019
    Inventors: Jin Mok Kim, YongHo Lee, Hyukchan Kwon, Ki Woong Kim, KwonKyu Yu
  • Patent number: 10211957
    Abstract: A simultaneous information and energy transfer method and system with a guard interval signal are provided. The method comprises the steps of generating, by a transmitting terminal, a controllable guard interval signal according to the current energy demand and environment conditions for channel transmission. The system comprises a transmitting terminal configured to generate a controllable guard interval signal. In the system and method, the guard interval time is fully utilized to transfer a guard interval signal with controllable amount of energy, which not only prevents intersymbol interference, but also provides controllable energy signals within the guard interval time at the same time, thus improving the energy transfer performance of the system and reducing the probability that the receiving terminal is unable to operate normally due to energy shortage. The present invention can be widely applied to a variety of simultaneous wireless information and energy transfer systems.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: February 19, 2019
    Inventors: Yi Gong, Zidong Han, Yue Zhang, Xiaoyang Li, Mingzhe Li
  • Patent number: 10212007
    Abstract: A method and apparatus for equalization in a communication system. The method includes receiving an input of a block of symbols, filtering the input in the frequency domain, calculating an error factor in the time domain based on the filtered input, updating tap weights of the equalizer in the frequency domain using circular correlation based on the error factor and the conjugate of the input in the frequency domain, and outputting the filtered input.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: February 19, 2019
    Inventors: Kabiru Akande, Naveed Iqbal, Azzedine Zerguine, Abdelmalek Zidouri
  • Patent number: 10205485
    Abstract: A communication apparatus (100) of the present invention includes a first communication circuit (2), a second communication circuit (1), and one signal line (3). The first communication circuit (2) transmits a collector voltage of an open collector circuit as an output signal. A second communication circuit (1) receives the output signal. The one signal line (3) connects the first communication circuit (2) and the second communication circuit (1). Particularly the first communication circuit (2) transmits the output signal as a pulse signal (57) to the second communication circuit (1). The second communication circuit (1) transmits a voltage signal (56) generated in the second communication circuit (1) to the first communication circuit (2). The first communication circuit (2) and the second communication circuit (1) communicate the pulse signal (57) and the voltage signal (56) bidirectionally via the signal line (3).
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: February 12, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Mineaki Isoda, Masahito Hidaka, Koji Kuyama
  • Patent number: 10200151
    Abstract: A method of transmitting Ethernet data over multiple physical sub-channels is disclosed. The method includes determining one or more noisy sub-channels affected by alien crosstalk; selectively reducing a number of data bits per symbol for transmitted data symbols along the noisy sub-channels; transmitting data along the noisy sub-channels via sparser constellations; and transmitting data along non-noisy sub-channels via denser constellations.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: February 5, 2019
    Assignee: Aquantia Corp.
    Inventors: Ramin Farjadrad, Hossein Sedarat