Patents Examined by Betsy Deppe
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Patent number: 11533126Abstract: A method comprises: receiving, from a communication channel, non-binary multilevel symbols that represent corresponding multibit labels each including at least a least-significant bit (LSB) and a most-significant bit (MSB), the non-binary multilevel symbols mapped to the multibit labels according to set-partition labeling, which partitions the non-binary multilevel symbols between a first set and a second set according to a first value and a second value of the LSB, respectively; digitizing the non-binary multilevel symbols to produce symbol samples; and performing Soft-Output-Viterbi (SOV) equalization of the non-binary multilevel symbols based on the symbol samples, to produce decoded symbol information corresponding to the non-binary multilevel symbols.Type: GrantFiled: August 20, 2021Date of Patent: December 20, 2022Assignee: CISCO TECHNOLOGY, INC.Inventors: Stefan Helmut Müller-Weinfurtner, Andreas Bernhard Bisplinghoff
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Patent number: 11528121Abstract: Included are a demodulation unit that demodulates a received OFDM modulation signal to acquire a demodulated constellation signal, an ideal constellation signal generation unit that generates an ideal constellation signal from the demodulated constellation signal, a data extraction unit that extracts signal data corresponding to subcarriers included in a part of an intermediate frequency section among all frequency sections, from the demodulated constellation signal and the ideal constellation signal, a phase error calculation unit that calculates the phase error of the demodulated constellation signal for the ideal constellation signal, with respect to the extracted signal data, a phase error characteristic estimation unit that estimates the frequency characteristic of the phase error, and a phase error correction unit that corrects the phase error of the demodulated constellation signal, based on the frequency characteristic of the phase error.Type: GrantFiled: June 28, 2021Date of Patent: December 13, 2022Assignee: ANRITSU CORPORATIONInventor: Atsuki Morita
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Patent number: 11522668Abstract: A method applicable to a receiver circuit, including: performing a cross-correlation operation upon at least one time-domain signal on at least one receiver path of the receiver circuit according to a local sequence signal, to estimate at least one time offset amount of the at least one time-domain signal as at least one time offset compensation amount; and, performing time offset compensation upon the at least one time-domain signal on the at least one receiver path according to the at least one time offset compensation amount.Type: GrantFiled: July 4, 2021Date of Patent: December 6, 2022Assignee: Realtek Semiconductor Corp.Inventor: Lihua Wang
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Patent number: 11522741Abstract: A method of a receiver is used for receiving an amplitude shift keyed signal provided over a multi-layered transmission from a plurality of antennas with different precoding of different symbols for the respective layers. The method comprises receiving a sequence of signal values of the signal, estimating, from the sequence of signal values, channels for the respective layers, and selecting one of a plurality of detection methods based on a difference in quality between the estimated channels A receiver and a computer program are also disclosed.Type: GrantFiled: June 20, 2018Date of Patent: December 6, 2022Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Leif Wilhelmsson, Erik G. Larsson, Emil Björnson
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Patent number: 11496171Abstract: Aspects relate to reconstructing a received non-linearly distorted (e.g., clipped) signal. A transmitting device may non-linearly distort a signal to be transmitted (e.g., by clipping peaks of the signal). This non-linear distortion may adversely affect decoding of the signal at a receiving device. To improve decoding performance at the receiving device, the transmitting device provides information regarding some of the non-linear distortion (e.g., information regarding a subset of the peaks that have been clipped) to the receiving device. The receiving device may reconstruct the signal based on this information (e.g., by reconstructing the subset of the peaks and adding the reconstructed peaks to the received clipped signal). In addition, the receiving device estimates the remaining non-linear distortion in the reconstructed signal (e.g.Type: GrantFiled: May 5, 2021Date of Patent: November 8, 2022Assignee: QUALCOMM IncorporatedInventors: Yaron Laufer, Gideon Kutz, Elad Meir, Ory Eger, Assaf Touboul
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Patent number: 11496188Abstract: An electronic device operating on a base station side and includes a processing circuit configured to perform control to cause the electronic device to: estimate channel correlation in a first direction among a plurality of terminals communicating with the base station; and in response to that the estimated channel correlation in the first direction among the plurality of terminals satisfies a predetermined condition, transmit a first indication signal to indicate that a second measurement process is to be performed to determine channel information in a second direction after a first measurement process is to be performed to determine channel information in the first direction, and transmit, based on the channel information in the second direction, a second indication signal to indicate a precoding scheme for data to be transmitted from the base station to the plurality of terminals, the precoding scheme including linear precoding or non-linear precoding.Type: GrantFiled: October 21, 2019Date of Patent: November 8, 2022Assignee: SONY GROUP CORPORATIONInventors: Wendong Liu, Zhaocheng Wang, Jianfei Cao
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Patent number: 11489703Abstract: An intergrated circuit (IC) chip includes receiver circuitry to receive signals from a second IC chip. The receiver circuitry includes equalization circuitry having at least one tap to equalize the signals. The equalization circuitry includes a tap weight adapter circuit to generate at least one tap weight corresponding to the at least one tap based on edge information of previously received signals.Type: GrantFiled: November 19, 2020Date of Patent: November 1, 2022Assignee: Rambus Inc.Inventors: Brian S. Leibowitz, Hae-Chang Lee, Jihong Ren, Ruwan Ratnayake
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Patent number: 11483125Abstract: A clock and data recovery circuit includes a phase interpolation circuit that adjusts a phase of a reference clock signal generated by a reference clock generation circuit to generate a reception clock signal, a filter that performs filter processing on a data signal output from an ADC that converts an analog data signal to a digital data signal in synchronization with the clock signal, a phase comparison circuit that outputs phase difference data between a transmission-side clock signal and the reference clock signal based on an output of the filter, and a loop filter that generates phase data to be set in the phase interpolation circuit. The filter includes an FIR filter with a tap number N, and an FIR filter with a tap number N+1 that outputs a signal delayed by half a clock than the former FIR filter.Type: GrantFiled: November 3, 2021Date of Patent: October 25, 2022Assignee: MEGACHIPS CORPORATIONInventor: Yongwi Kim
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Patent number: 11483124Abstract: The present disclosure provides a clock and data recovery processor for recovering timing information from a measured signal with a data input interface configured to receive samples representing the measured signal, a level comparator coupled to the data input interface and configured to determine the signal level for each of the received samples in a group comprising a predetermined number of samples, a transition comparator coupled to the level comparator and configured to compare the number of signal transitions for the samples in the group with a predetermined transition number, and a bit value determiner coupled to the transition comparator and configured to determine bit values for data symbols in the measured signal based on the detected transitions, if the transition comparator determined the number of signal transitions being equal to or larger than the predetermined transition number. Further, the present disclosure provides a measurement device and a respective method.Type: GrantFiled: February 25, 2021Date of Patent: October 25, 2022Assignee: Rohde & Schwarz GmbH & Co. KGInventor: Iqbal Bawa
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Patent number: 11424808Abstract: An electronic device comprises processing circuitry configured to perform control to: transmit one or more beams via one or more groups of antenna panels; receive beam state indication of the one or more beams from a target communication apparatus; and determine one or more antenna panels serving the target communication apparatus in a group of antenna panels comprising an antenna panel corresponding to the beam state indication.Type: GrantFiled: August 7, 2018Date of Patent: August 23, 2022Assignee: SONY CORPORATIONInventor: Jianfei Cao
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Patent number: 11411588Abstract: The invention relates to a method for automatically adjusting a multiple-input-port and multiple-output-port tuning unit. The invention also relates to an apparatus for radio communication using this method. An apparatus for radio communication of the invention comprises: 4 antennas which form a multiport antenna array; 4 feeders; a multiple-input-port and multiple-output-port tuning unit having 4 input ports and 4 output ports; 4 sensing units; a transmission and signal processing unit, which applies 4 excitations to the input ports, one and only one of the excitations being applied to each of the input ports, and which delivers tuning unit adjustment instructions; and a control unit, which delivers one or more tuning control signals to the multiple-input-port and multiple-output-port tuning unit.Type: GrantFiled: August 13, 2020Date of Patent: August 9, 2022Inventors: Frédéric Broyde, Evelyne Clavelier
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Patent number: 11411786Abstract: A method includes obtaining an in-phase (I) input signal and a quadrature (Q) input signal at a quadrature modulator. The method also includes performing constant envelope bi-phase shift keying (CE-BPSK) modulation using the quadrature modulator to generate a modulated output signal. The I and Q input signals comprise complementary transitions that alter a frequency of the modulated output signal while maintaining a substantially-constant amplitude of the modulated output signal. The transitions of the Q input signal are associated with data being encoded onto the modulated output signal, and the modulated output signal represents the data using two phases and has phase reversals positioned between the two phases.Type: GrantFiled: May 3, 2021Date of Patent: August 9, 2022Assignee: Raytheon CompanyInventor: Macdonald J. Andrews
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Patent number: 11374729Abstract: An audio synchronization processing method is provided. The method includes the following steps: receiving an input request signal; in response to receiving the input request signal, starting performing a counting operation according to a basic clock signal; outputting an output request signal according to a sampling-clock signal; in response to outputting the output request signal, stopping performing the counting operation to obtain a counting value; determining whether synchronization has been achieved based on the counting value; and in response to determining that the synchronization has not been reached, adjusting a frequency of the sampling-clock signal according to the counting value.Type: GrantFiled: December 30, 2020Date of Patent: June 28, 2022Assignee: NUVOTON TECHNOLOGY CORPORATIONInventors: Cheng-Chieh Wang, Ming-Ying Liu
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Patent number: 11374733Abstract: A synchronisation symbol detector that comprises two correlation modules and a comparison module. The first correlation module performs one or more correlations between the input signal and a down-converted version of the input signal and generates a first correlation metric from the one or more first correlations. The second correlation module performs one or more second correlations between the input signal and an up-converted version of the input signal and generates a second correlation metric from the one or more second correlations. The comparison module is configured to compare the first correlation metric and the second correlation metric and determine whether the input signal comprises a synchronisation symbol based on the comparison.Type: GrantFiled: March 16, 2021Date of Patent: June 28, 2022Assignee: Imagination Technologies LimitedInventors: Filipe Carvalho, Taku Yamagata
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Patent number: 11355864Abstract: A signal distribution network associated with first and second antenna ports and first and second pluralities of antenna elements is configured to feed a first signal to/from the first and second pluralities of antenna elements via distribution nodes using a first ordered weighting set and feed a second signal to/from the first and second pluralities of antenna elements via distribution nodes using a second ordered weighting set. The first ordered weighting set comprises a first weighting element for each distribution node, each non-zero valued first weighting element being configured to provide a first signal contribution factor for first and second polarizations when combined with the antenna element orientation. The second ordered weighting set comprises a second weighting element for each distribution node, each non-zero valued second weighting element being configured to provide a second signal contribution factor for first and second polarizations when combined with the antenna element orientation.Type: GrantFiled: June 18, 2018Date of Patent: June 7, 2022Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Sven Petersson, Andreas Nilsson
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Patent number: 11349632Abstract: A transmission device includes a receiver configured to receive a frame signal including synchronization data, main signal data, and an error correction code, a compensator configured to compensate for distortion of the frame signal based on a compensation coefficient, a detector configured to detect synchronization timing of the frame signal from the synchronization data; a corrector configured to correct an error of the frame signal after the distortion is compensated, based on the error correction code according to the synchronization timing, a generator configured to generate a replica signal from the frame signal after the error is corrected by the corrector, based on the synchronization timing, the replica signal corresponding to the frame signal before the distortion is compensated, and an update processor configured to update the compensation coefficient based on the replica signal and the frame signal before the distortion is compensated.Type: GrantFiled: February 17, 2021Date of Patent: May 31, 2022Assignee: FUJITSU LIMITEDInventors: Yoshitaka Nomura, Hisao Nakashima
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Patent number: 11342969Abstract: Methods and systems that can enable antenna selection (AS) and data bits in transmitted spatially modulated (SM) streams to be detected at a receiver using different detection methods. In example embodiments, encoding for an AS stream is done separately at a transmitter than encoding for data streams, enabling a receiver to use one type of detection for AS bits and a reduced complexity type of MIMO detection for the data bits.Type: GrantFiled: November 27, 2020Date of Patent: May 24, 2022Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Jung Hoon Suh, Osama Aboul-Magd, Kwok Shum Au
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Patent number: 11329851Abstract: Some aspects described herein relate to determining a length for a sequence for communicating a signal, determining a reduced length as a largest prime number that is smaller than a fraction of the length, generating a Zadoff-Chu sequence based on the reduced length, extending the Zadoff-Chu sequence to be of the length to generate the sequence of the length, and communicating the signal based on the generated sequence.Type: GrantFiled: December 10, 2019Date of Patent: May 10, 2022Assignee: QUALCOMM IncorporatedInventors: Wei Yang, Seyong Park, Yi Huang, Peter Gaal
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Patent number: 11316576Abstract: A wireless communication system and a precoder device for use in such system. The precoder device includes a delay element arranged to introduce a delay to a plurality of sub-channels of a signal at a transmitter end of the communication system; wherein the delay in a plurality of sub-channels are associated with a process time of a receiver component at a receiver end of the communication system.Type: GrantFiled: October 30, 2019Date of Patent: April 26, 2022Assignee: City University of Hong KongInventors: Chi Wah Kok, Wing Shan Tam, Wai Ming Chan, Hing Cheung So
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Patent number: 11309892Abstract: A circuit includes signal conditioner circuitry, level shifter circuitry, and state detector and controller circuitry coupled between the signal conditioner circuitry and the level shifter circuitry. The state detector and controller circuitry includes receiver circuitry and a finite state machine coupled to the receiver circuitry. The finite state machine is configured to detect a first data rate from signals, control operation of the signal conditioner circuitry responsive to detecting the first data rate, and control operation of the level shifter circuitry during a second data rate.Type: GrantFiled: February 11, 2021Date of Patent: April 19, 2022Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Win Naing Maung, Bharath Kumar Singareddy, Soumi Paul, Mayank Garg, Suzanne Mary Vining