Patents Examined by Wednel Cadeau
  • Patent number: 10270628
    Abstract: The present invention is directed to data communication. In a specific embodiment, a known data segment is received through a data communication link. The received data is equalized by an equalizer using an adjustable equalization parameter. The output of the equalizer is sampled, and a waveform is obtained by sweeping one or more sampler parameters. The waveform is evaluated by comparing it to the known data segment. Based on the quality of the waveform, equalizer parameter is determined. There are other embodiments as well.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: April 23, 2019
    Assignee: INPHI CORPORATION
    Inventors: Richard Ward, Parmanand Mishra
  • Patent number: 10270545
    Abstract: A device for detecting an interference signal includes an estimator configured to estimate a mean value of received signals output from an analog-digital converter (ADC), a filter configured to filter a low frequency band of the received signals using the estimated mean value to produce filtered received signals, a detector configured to detect, from the filtered received signals, interference signals using a coherent modulation scheme and a non-coherent modulation scheme, and a combiner configured to determine whether interference exists in a frequency channel in response to a result of the interference signal detecting using the coherent modulation scheme and the non-coherent modulation scheme, based on a preset condition.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: April 23, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang Soon Park, Hyo Sun Hwang, Joon Seong Kang, Young Jun Hong
  • Patent number: 10257009
    Abstract: Described is a method of searching of multichannel signal and technique of demodulating and detecting DBPSK frequency division multiple access (FDMA) ultra-narrow band signal. A search is based on algorithm encompassing a signal-processing signal, and technique to demodulate and detect FDMA ultra-narrow band together with a method to increase time-frequency resolution.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: April 9, 2019
    Assignee: WAVIOT INTEGRATED SYSTEMS, LLC
    Inventors: Andrey Orlov, Vasiliy Anisimov
  • Patent number: 10222478
    Abstract: A receiver (100) is provided for signals of different signal strengths and modulated with respective pseudorandom noise (PN) codes. The receiver (100) includes a correlator circuit (120) operable to correlate the signals with a selectable locally-issued PN code having a Doppler and a code lag to produce a peak, the correlator circuit (120) being subject to cross correlation with a distinct PN code carried by least one of the signals that can produce cross correlation; and a cross correlation circuit (370, 400) operable to generate a variable comparison value related to the cross correlation as a function of values representing a Doppler difference and a code lag difference between the locally-issued PN code and the distinct PN code, and to use the variable comparison value to reject the peak as invalid from cross correlation or to pass the peak as a valid received peak.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: March 5, 2019
    Assignee: Texas Instruments Incorporated
    Inventors: Jawaharlal Tangudu, Arun Raghupathy
  • Patent number: 10211868
    Abstract: A transceiver comprises local oscillator circuitry, phase noise determination circuitry, mixing circuitry, and digital signal processing circuitry. The local oscillator circuitry is operable to generate a local oscillator signal. The phase noise determination circuitry is operable to introduce a frequency-dependent phase shift to the local oscillator signal to generate a phase-shifted version of the local oscillator signal. The mixing circuitry is operable to mix the local oscillator signal and the phase-shifted version of the local oscillator to generate a baseband signal having an amplitude proportional to a phase difference between the local oscillator signal and the phase-shifted version of the local oscillator signal. The digital signal processing circuitry is operable to process the baseband signal to determine a phase error of the local oscillator signal, and perform signal compensation based on the determined phase error.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: February 19, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Curtis Ling, Sheng Ye
  • Patent number: 10205494
    Abstract: Disclosed is a method for supporting device-to-device (D2D) communication to which multiple-input and multiple-output (MIMO) technology is applied in a wireless communication system. The method for supporting D2D communication includes receiving, from a transmission end, a resource configuration associated with transmission and reception of a first reference signal and D2D data of a D2D resource pool in an uplink resource; transmitting, to the transmission end, the first reference signal related to at least one first antenna port of the D2D terminal through an uplink resource according to the resource configuration; receiving, through the uplink resource, D2D data and a second reference signal from at least one second antenna port among a plurality of second antenna ports of the transmission end determined based on the first reference signal; and decoding the received D2D data based on a precoding applied to the second reference signal.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: February 12, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Youngtae Kim, Inkwon Seo, Jinyup Hwang, Seungmin Lee, Kijun Kim
  • Patent number: 10171281
    Abstract: A four-level pulse amplitude modulation transmitter and corresponding method are provided. The transmitter includes a most significant bit processing section and a least significant bit processing section. The transmitter further includes at least one termination resistor connected to respective outputs of the processing sections to provide a transmitter output. Each of the processing sections include a set of retiming latches arranged in a parallel for aligning input parallel data and providing parallel aligned latched outputs responsive to one phase of a quarter-rate four-phase quadrature clock. Each of the processing sections further includes a serializer for serializing the parallel aligned latched outputs to provide a serialized output using quarter-rates of the quarter-rate four-phase quadrature clock. Each of the processing sections also include an output driver for driving the serialized output.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: January 1, 2019
    Assignee: International Business Machines Corporation
    Inventors: Timothy O. Dickson, Bongjin Kim
  • Patent number: 10171228
    Abstract: In a self-synchronous transmission scheme, received data is accurately acquired. A timing signal generating unit generates timing signals indicating different timings in synchronization with a timing at which a status of a reception signal transitions. A first data signal generating unit generates a first data signal from statuses of the reception signal before and after a timing at which a predetermined first timing signal becomes a specific value, and outputs the first data signal in synchronization with a second timing signal different from the first timing signal. A second data signal generating unit generates a second data signal from statuses of the reception signal before and after a timing at which the second timing signal becomes the specific value, and outputs the second data signal in synchronization with a timing signal different from the first timing signal.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: January 1, 2019
    Assignee: Sony Corporation
    Inventor: Hajime Hosaka
  • Patent number: 10171279
    Abstract: A transmitter includes: a null symbol map unit to determine a null symbol arrangement pattern by combining different unit patterns determining positions of data symbols and null symbols; a subcarrier map unit to assign, in a two-dimensional space defined by a plurality of subcarriers for use in multicarrier transmission and a time series represented in units of time determined in accordance with a single symbol, transmission data to positions of data symbols of the respective subcarriers determined in accordance with the null symbol arrangement pattern; a modulator to generate the data symbols by modulating the assigned transmission data, assign null symbols having a power of 0 to positions of null symbols of the respective subcarriers determined in accordance with the null symbol arrangement pattern, and generate transmission symbols of the respective subcarriers; and a baseband section to output a baseband signal based on the transmission symbols.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: January 1, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazumasa Suzuki, Kazuaki Ishioka
  • Patent number: 10164692
    Abstract: A method of operating a transmission device in a wireless communication system includes: determining a reception state of a reception device; and performing beamforming based on the reception state.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: December 25, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Doyoung Jung, Changyeul Kwon, Donghwi Roh, Sungrok Yoon, Seok-Yong Lee, Ohyun Jo
  • Patent number: 10164815
    Abstract: A frequency estimation apparatus and method for a single receiver. The frequency estimation apparatus for the single receiver includes: a coarse frequency estimation unit estimating a coarse frequency by calculating an average of frequency estimation values for each single pulse; a direct current domain transformation unit transforming a reception signal into a direct current domain based on the coarse frequency; a fine frequency estimation unit estimating a fine frequency by applying regression analysis to a pulse train in the direct current domain of the coarse frequency; and an extremely fine frequency estimation unit estimating an extremely fine frequency by compensating an error of the coarse frequency with the fine frequency.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: December 25, 2018
    Assignee: AGENCY FOR DEFENSE DEVELOPMENT
    Inventors: So-Yeon Kim, Kyu-Ha Song, San-Hae Kim, Hyun-Gyu Kwak, Chung-Su Jang
  • Patent number: 10158390
    Abstract: According to the present disclosure, there is provided methods of processing a signal using quantized symbols. More particularly, in one example, the method comprises the steps of processing a signal (206), said method comprising the steps of: receiving a signal (206) comprising a plurality of raw symbols, each raw symbol having a plurality of bits and being conveyed in a channel; estimating a channel state information value (206) of the channel used to convey each raw symbol to generate a corresponding plurality of channel state information values; quantizing the plurality of raw symbols based on their channel state information values to generate a sequence of quantized symbols (214); and quantizing the channel state information values to generate a sequence of quantized channel state values (216).
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: December 18, 2018
    Assignee: NXP B.V.
    Inventors: Andries Hekstra, Alessio Filippi, Semih Serbetli, Arie Koppelaar
  • Patent number: 10142040
    Abstract: An apparatus for reducing an amplitude imbalance and a phase imbalance between an in-phase signal and a quadrature signal is provided. The in-phase signal and the quadrature signal are based on a radio frequency receive signal. The apparatus includes an imbalance estimation module configured to generate a first correction signal related to a first phase shift, and to generate a second correction signal related to a second phase shift. Further, the apparatus includes a first digital-to-time converter configured to receive the first correction signal and a local oscillator signal. The first digital-to-time converter is further configured to supply a first replica of the local oscillator signal for a first mixer generating the in-phase signal, wherein the first replica of the local oscillator signal has the first phase shift with respect to the local oscillator signal.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: November 27, 2018
    Assignee: Intel IP Corporation
    Inventors: Victor Da Fonte Dias, Giuseppe Li Puma
  • Patent number: 10142097
    Abstract: A system for serializing input data signals and generating an output data signal includes a FIFO memory that launches the input data signals at different phases of a clock signal. The system further includes multiple stages of a serializer circuit, and each stage of the serializer circuit receives a clock signal. Each successive stage includes half the number of serializer circuits that are included in the previous stage, and each successive stage is clocked by a clock signal that transitions at twice the frequency of the previous stage clock signal. The serializer circuits that belong to a single stage receive the clock signal with different phase. The phase and frequency of clock signals of serializer stages are adjusted such that a launched input data signal is outputted as the output data signal. Further, a critical path for each serializer circuit is equal to full clock cycle of the clock signal.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: November 27, 2018
    Assignee: Synopsys, Inc.
    Inventors: Biman Chattopadhyay, Ravi Mehta
  • Patent number: 10135470
    Abstract: An apparatus includes a memory element and a processing device. The memory element is configured to store a plurality of configurations for different sensors in an industrial process and control system. The processing device is configured to identify at least one wired connection to a sensor in the industrial process and control system. The processing device is also configured to detect a type of the sensor based on the at least one wired connection. The processing device is also configured to identify a configuration of the plurality of configurations based on the type of the sensor.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: November 20, 2018
    Assignee: Honeywell International Inc.
    Inventors: Santosh Gopisetti, Sharath Babu Malve, Chaitanya Kumar Beeram
  • Patent number: 10129060
    Abstract: A communication device for allocating tones is described that includes a processor and instructions in memory in electronic communication with the processor. The communication device determines whether a bandwidth for signal transmission is 20, 40, 80 or 160 megahertz (MHz). The communication device respectively allocates tones for 20, 40, 80 or 160 MHz as follows: for a very high throughput (VHT) signal A1 (VHT-SIG-A1): 52, 104, 208, 416; a VHT signal A2 (VHT-SIG-A2): 52, 104, 208, 416; a VHT short training field (VHT-STF): 12, 24, 48, 48; one or more VHT long training field(s) (VHT-LTF(s)): 56, 114, 242, 484; a VHT signal B (VHT-SIG-B): 56, 114, 242, 484; and a data field (DATA): 56, 114, 242, 484. The communication device also transmits the signal.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: November 13, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Vincent Knowles Jones, IV, Didier Johannes Richard van Nee, Hemanth Sampath
  • Patent number: 10129017
    Abstract: The present invention is directed to data communication. More specifically, an embodiment of the present invention provides a technique for detecting loss of signal. An incoming data stream is sampled and a recovered clock signal is generated accordingly. An output clock signal of a higher frequency than the recovered clock signal is generated by a transmission PLL. The frequency of the recovered clock signal is compared to a divided frequency of the output clock signal. If a difference between the recovered clock signal and the output clock signal is greater than a threshold, a loss of signal indication is provided. There are other embodiments as well.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: November 13, 2018
    Assignee: INPHI CORPORATION
    Inventors: Parmanand Mishra, Simon Forey
  • Patent number: 10120346
    Abstract: A satellite radio wave receiving processing unit 60 includes a front end 60a which receives a radio wave including a code signal transmitted from a satellite, and a baseband unit 64 which acquires the code signal from the received radio wave, in which the baseband unit identifies a pseudo-random code sequence used for performing spread spectrum to the code signal and a phase of the pseudo-random code sequence in a transmission period, identifies a code type of the code signal every time according to the transmission period, identifies, by comparing an array of the identified code type with a plurality of comparison arrays expected to appear as the array of the code type, a head timing of each code in the code signal according to a comparison array in which a result of the comparison satisfies a predetermined condition, and identifies each code in synchronization with the identified head timing.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: November 6, 2018
    Assignee: CASIO COMPUTERS CO., LTD.
    Inventors: Takeshi Matsue, Hideo Abe, Tatsuya Sekitsuka
  • Patent number: 10110402
    Abstract: A PAM4 signal generation apparatus is provided. The PAM4 signal generation apparatus includes a DFB, two EA modulators, an SOA, a PSR, a direct-current power source, two electrical-signal generators, and two amplitude-limiting amplifiers. The two electrical-signal generators and the two amplitude-limiting amplifiers are used to generate two NRZ electrical signals respectively, the DFB outputs two optical signals, the SOA amplifies an optical power of one of the optical signals, the two EA modulators use the NRZ electrical signals and the optical signals including “a large signal and a small signal” respectively to generate two NRZ optical signals respectively, and the two NRZ optical signals are multiplexed by the PSR to generate a PAM4 electrical signal. According to this apparatus, a linearity requirement is greatly lowered. PAM4 modulation is performed in an optical domain, and this prevents a PAM4 signal from being generated on an electrical signal.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: October 23, 2018
    Assignee: Hisilicon Optoelectronics Co., Limited
    Inventors: Hongmin Chen, Zhenwei Cui, Xi Huang
  • Patent number: 10103779
    Abstract: In a powerline communications (PLC) network having a first node and at least a second node on a PLC channel utilizing a band including a plurality of tones, based on at least one channel quality indicator (CQI), the first node allocates for a tone map response payload only a single (1) power control bit for each of a plurality of subbands having two or more tones. The power control bit indicates a first power state or a second power state. The first node transmits a frame including the tone map response payload to the second node. The second node transmits a frame having boosted signal power for the tones in the subbands which have the first power state compared to a lower signal power for the tones in the subbands which have the second power state.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: October 16, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Il Han Kim, Anand G. Dabak, Tarkesh Pande