Patents Examined by Jean B. Corrielus
  • Patent number: 11223432
    Abstract: An apparatus for determining unknown radio frequencies is described. The apparatus modulates a first optical signal from tunable optical source with RF signal that includes unknown center frequency value to generate modulated optical signal. The apparatus combines modulated optical signal with second optical signal to generate combined modulated optical signal. The apparatus receives output electrical signal from photodetector in response to receiving combined modulated optical signal at photodetector, splits output electrical signal into first output electrical signal and second output electrical signal, and filter first output electrical signal by applying first optical bandpass filter centered to generate first filtered RF signal. The apparatus tunes tunable optical source to first beat frequency value to determine unknown frequency value of RF signal.
    Type: Grant
    Filed: August 9, 2021
    Date of Patent: January 11, 2022
    Assignee: King Abdulaziz University
    Inventors: Abdulah Jeza Aljohani, Salman Ghafoor, Ammar Khalid
  • Patent number: 11223394
    Abstract: Systems, methods, and instrumentalities are disclosed for antenna virtualization, e.g., in at least a two-dimensional antenna array. NE physical antenna elements may be virtualized to Np logical antenna ports. A virtualization may be WTRU-specific, which may optimize MIMO performance. A simplified MIMO scheme may be used with A reduction in feedback, reference signal, and/or control signaling overhead. Antenna virtualization schemes may utilize channel characteristics. Antenna virtualization may be defined, for example, based on antenna port to antenna element mapping, based on a measurement reference signal, based on a codebook or a codebook subset or based on an antenna virtualization matrix. One or more antenna virtualization schemes may be configured in a cell. Antenna virtualization schemes may be configured in a WTRU-specific manner, perhaps for example based on a WTRU channel characteristic(s). A WTRU may report one or more useful (e.g., optimized) antenna virtualization schemes, e.g.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: January 11, 2022
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Moon-il Lee, Afshin Haghighat, Meilong Jiang, Janet A. Stern-Berkowitz
  • Patent number: 11218118
    Abstract: An example apparatus includes a power amplifier (PA) and a linearity optimizer. The optimizer includes a PA actuator and a linearity adaptation circuit. The actuator is configured to generate an actuator output based on an actuator input and a vector of complex gains computed by the linearity adaptation circuit based on a feedback signal indicative of PA's output. The adaptation circuit is configured to compute the vector of complex gains in a manner that maximizes the power of the actuator output while ensuring that the deviation of PA's behavior from a linear behavior (e.g., in terms of one or more linearity parameters) is below a threshold. Controlling actuator output in a manner that maximizes its power while taking into consideration one or more linearity parameters to ensure that target linearity is achieved controls drive signals for the PA and, thus, may help in terms of PA linearity and efficiency.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: January 4, 2022
    Assignee: ANALOG DEVICES INTERNATIONAL UNLIMITED COMPANY
    Inventors: Patrick Pratt, Hossein Yektaii
  • Patent number: 11212862
    Abstract: A method and system for cross-technology communication from a WiFi device to a ZigBee device includes: generating, by a WiFi transmitter, to-be-transmitted symbol-level energy modulation bits information simultaneously carrying WiFi data bits and cross-technology data bits transmitted to the ZigBee device, wherein the cross-technology data bits are obtained based on symbol-level energy modulation; and a ZigBee receiver processing received signal strength indication sample information and initiating a cross-technology communication receiving process to obtain the cross-technology data bits needing to be received, and meanwhile a WiFi receiver obtaining the to-be-transmitted symbol-level energy modulation bits information through a standard WiFi receiving process, and then initiating a WiFi data recovery process to obtain original WiFi data bits.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: December 28, 2021
    Assignee: SHENZHEN UNIVERSITY
    Inventors: Junmei Yao, Kaishun Wu
  • Patent number: 11201645
    Abstract: A detection method is presented that combines two non-linear approaches, the Sphere Decoder (SD) and the K-best algorithms, to identify symbols transmitted over a communication channel in a multiple input-multiple output (MIMO) communication system. A parallel implementation on a x86 computer system is presented, which reduces the number of evaluations by branching over plural symbols and diversifies the search process, which may rapidly reduce the radius and thus, the time complexity of the computer system.
    Type: Grant
    Filed: March 15, 2021
    Date of Patent: December 14, 2021
    Assignees: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY, RESEARCH CENTER ON SCIENTIFIC AND TECHNICAL INFORMATION
    Inventors: Mohamed-Slim Alouini, David Elliot Keyes, Hatem Ltaief, Adel Dabah, Zouheir Rezki
  • Patent number: 11201657
    Abstract: Disclosed herein are apparatuses, systems, and methods for reference signal design for initial acquisition, by receiving a first primary synchronization signal (PSS) and a first secondary synchronization signal (SSS) from a first transmit (Tx) beam, in first contiguous orthogonal frequency division multiplexing (OFDM) symbols of a downlink subframe. A UE can receive at least a second PSS and a second SSS from a second Tx beam in contiguous OFDM symbols of the downlink subframe. A UE can then detect beamforming reference signals (BRSs) corresponding to the first Tx beam and the second Tx beam, based on identification of physical cell ID information and timing information processed from the first PSS, the second PSS, the first SSS, and the second SSS. The UE can select the first Tx beam or the second Tx beam that was received with the highest power, based on the BRSs. Other embodiments are described.
    Type: Grant
    Filed: May 22, 2020
    Date of Patent: December 14, 2021
    Assignee: Apple Inc.
    Inventors: Gang Xiong, Huaning Niu, Yushu Zhang, Jong-Kae Fwu, Yuan Zhu, Ralf Matthias Bendlin
  • Patent number: 11201766
    Abstract: A detector circuit for galvanically isolated transmission of digital signals. The detector circuit includes two differential signal inputs, one input common-mode voltage connection, one alternating voltage coupling, and one differential stage. The detector circuit also includes one operating voltage connection, one operating ground connection, one signal output, one bias current connection, and one rectifier stage. The alternating current coupling includes two capacitors and two resistors. The differential stage includes a first n-channel transistor and a second n-channel transistor. The bias current connection is connected to the differential stage via a third n-channel transistor. The bias current connection is connected to the rectifier stage via a fourth n-channel transistor and a fifth n-channel transistor. The rectifier stage includes five p-channel transistors.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: December 14, 2021
    Assignee: Robert Bosch GmbH
    Inventor: Andreas Schubert
  • Patent number: 11201632
    Abstract: A high-frequency front-end module includes transmission amplifier circuits, a transmission filter that is connected between a common terminal and the transmission amplifier circuit and has a transmission band of a band A as a pass band, a reception filter that is connected to the common terminal and has a reception band of a predetermined communication band as a pass band, in which a frequency of an intermodulation distortion generated by a transmission signal from the transmission amplifier circuit and a transmission signal from the transmission amplifier circuit overlaps the pass band, and a band elimination filter that is disposed in a signal path connecting an output terminal of the transmission amplifier circuit and the transmission filter, and has a transmission band of the band A as a pass band and a transmission band of a band B as an attenuation band.
    Type: Grant
    Filed: November 18, 2020
    Date of Patent: December 14, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Motoji Tsuda
  • Patent number: 11201770
    Abstract: Provided are a preamble symbol generation method and receiving method, and a relevant frequency-domain symbol generation method and a relevant device, characterized in that the method comprises: generating a cyclic prefix according to a partial time-domain main body signal truncated from a time-domain main body signal; generating a modulation signal based on a portion or the entirety of the partial time-domain main body signal; and generating time-domain symbols based on at least one of the cyclic prefix, the time-domain main body signal and the modulation signal, wherein the preamble symbol contains at least one of the time-domain symbols.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: December 14, 2021
    Assignee: Shanghai National Engineering Research Center of Digital Television Co., Ltd.
    Inventors: Wenjun Zhang, Guanbin Xing, Ge Huang, Hongliang Xu, Dazhi He, Yunfeng Guan
  • Patent number: 11196604
    Abstract: A sequence-based signal processing method and apparatus are provided. A sequence meeting a requirement for sending a signal by using a physical uplink control channel (PUCCH) is determined. The sequence is a sequence {fn} consisting of 12 elements, fn represents an element in the sequence {fn}, and the determined sequence {fn} is a sequence meeting a preset condition. Then, the 12 elements in the sequence {fn} are respectively mapped to 12 subcarriers, to generate a first signal, and the first signal is sent. By using the determined sequence, when the signal is sent by using the PUCCH, a low correlation between sequences can be maintained, and a relatively small peak-to-average power ratio (PAPR) value and a relatively small cubic metric (CM) value can be maintained. Therefore, a requirement of a communication application environment in which the signal is sent by using the PUCCH is met.
    Type: Grant
    Filed: May 11, 2020
    Date of Patent: December 7, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Bingyu Qu, Hao Sun
  • Patent number: 11184070
    Abstract: This document describes a solution for sensing a location by using a wireless network. According to an aspect, a method for an access node of the wireless network comprises: receiving, by the access node from a wireless device at a location, a channel measurement signal; determining, by the access node, precoding coefficients for the location based on the channel measurement signal; storing, by the access node, the precoding coefficients as linked to the location; and utilizing, by the access node, the preceding coefficients to acquire information on the location.
    Type: Grant
    Filed: January 15, 2021
    Date of Patent: November 23, 2021
    Assignee: Nokia Technologies Oy
    Inventors: Olli Alanen, Mika Kasslin, Janne Marin, Veli-Matti Kolmonen, Enrico Henrik Rantala
  • Patent number: 11184110
    Abstract: Channel state information (CSI) scaling modules for use in a demodulator configured to demodulate a signal received over a transmission channel, the demodulator comprising a soft decision error corrector (e.g. LDPC decoder) configured to decode data carried on data symbols of the received signal based on CSI values. The CSI scaling module is configured to monitor the performance of the soft decision error corrector and in response to determining the performance of the soft decision error corrector is below a predetermined level, dynamically select a new CSI scaling factor based on the performance of the soft decision error corrector.
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: November 23, 2021
    Assignee: Imagination Technologies Limited
    Inventors: Filipe Carvalho, Paul Murrin
  • Patent number: 11171710
    Abstract: A communications device and a data receiving method thereof are provided. The communications device includes: a receiver antenna receiving data; a receiver phase shifter forming a first sum beam and a first difference beam based on a first estimated direction-of-arrival (DOA); a receiver radio frequency (RF) chain generating first difference beam output using the first difference beam formed during a first data period of the received data and generating first sum beam output using the first sum beam formed in a second data period of the received data, which is different from the first data period; and a receiver controller calculating an offset vector between an actual DOA and the first estimated DOA based on the first difference beam output and the first sum beam output.
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: November 9, 2021
    Assignees: SAMSUNG ELECTRONICS, CO., LTD., INDUSTRY—ACADEMIC COOPERATION FOUNDATION, YONSIE UNIVERSITY
    Inventors: Ho Il Kim, Kwang Soon Kim
  • Patent number: 11165463
    Abstract: An interference canceling subsystem for a bidirectional communications network includes an input interface configured to receive a first data signal from a first transceiver of the network, an output portion configured to receive a second data signal from a second transceiver of the network, a first signal path connecting the input interface to the output portion, a second signal path connecting the output portion to the input interface, and a first interference canceler disposed between the output portion and the input interface along the second signal path. The first signal path is configured to relay the first data signal from the input interface to the output portion. The interference canceler is configured to (i) relay the second data signal from the output portion to the input interface, and (ii) remove portions of the first data signal from the relayed second data signal prior to reaching the input interface.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: November 2, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventor: Thomas H. Williams
  • Patent number: 11165618
    Abstract: A method for transmitting a broadcast signal includes encoding service data; encoding signaling data; building one or more signal frames including one or more data symbols carrying the encoded service data and one or more preamble symbols carrying the encoded signaling data; modulating the one or more preamble symbols and the one or more data symbols into one or more preamble Orthogonal Frequency Division Multiplex (OFDM) symbols and one or more data OFDM symbols by an OFDM scheme; normalizing average power of the one or more preamble OFDM symbols and the one or more data OFDM symbols in time domain using power normalization factors. Further, a power normalization factor for a preamble OFDM symbol is obtained using frequency domain total power of the preamble OFDM symbol in frequency domain, the frequency domain total power of the preamble OFDM symbol is 7737.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: November 2, 2021
    Assignee: LG ELECTRONICS INC.
    Inventors: Jaehyung Kim, Woosuk Ko, Sungryong Hong
  • Patent number: 11165467
    Abstract: A high data rate signal combiner (HDRSC), including: a first analog to digital converter (ADC) configured to convert a first radio frequency (RF) signal from a first antenna into a first digital signal; a second ADC configured to convert a second RF signal from a second antenna into a second digital signal; a first circular buffer configured to store the first digital signal from the first ADC; a second circular buffer configured to store the second digital signal from the second ADC; a cross-correlator configured to cross correlate the first digital signal and the second digital signal; a lag peak search circuit configured to determine the location of a peak in the output of the cross-correlator; a vector adder circuit configured to combine the first digital signal and the second digital signal with a delay on one of the first signal and the second digital signal based upon the location of the peak in the output of the cross-correlator; and a digital to analog converter (DAC) configured to convert the combin
    Type: Grant
    Filed: January 25, 2021
    Date of Patent: November 2, 2021
    Assignee: United States of America as represented by the Administrator of NASA
    Inventors: Howard Garon, David Caruth, Obadiah Kegege, Frank Stocklin, Victor Sank
  • Patent number: 11159216
    Abstract: A mobile station connected to a multi-carrier cellular communication system having a plurality of sub-carriers. The sub-carriers are classified into K frequency sub-bands, channel state information (CSI) of the frequency sub-bands is represented by matrices Wi (i=0 . . . K?1), where K is an integer greater than 1. The mobile station determines a first sub-index k1 for the K matrices W1 (i =0...K -1), and a second sub-index k2 for each one of the K matrices Wi (i=0 . . . K?1). The first sub-index k1 is common for all frequency sub-bands, and the second sub-index k2 is specific for the indexed matrix that corresponds to one frequency sub-band. The mobile station reports to a base station of the multi-carrier cellular communication system the first sub-index k1 and at least one second sub-index k2.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: October 26, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Mattias Frenne, Jianghua Liu
  • Patent number: 11152966
    Abstract: Technologies directed to digital active interference cancellation (d-AIC) for full duplex transmit-receive (TX-RX) concurrency. An integrated circuit can include first and second analog front-ends (AFE) and digital front-end (DFE) circuits and a digital AIC circuit that generates a scaled and delayed replica of a first quadrature (IQ) sample corresponding to first data transmitted by the first AFE circuit which is being coupled into the receiver as aggressor. The digital AIC circuit receives a second IQ sample from the second AFE circuit, the second IQ sample corresponding to second data being received by the second AFE circuit. The digital AIC circuit subtracts the scaled and delayed replica of the first IQ sample from the second IQ sample to obtain a third IQ sample and sends the third IQ sample to the second DFE circuit. Third IQ sample is the desired signal when d-AIC cancels the self-interference.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: October 19, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Basak Oyman, Sai Prashanth Chinnapalli, Morris Yuanhsiang Hsu
  • Patent number: 11152987
    Abstract: A passive receiver system includes a first cross-dipole antenna on a platform, a second cross-dipole antenna on the platform, a passive receiver, and beam steering logic for the first and second cross-dipole antennas. The beam steering logic steers a radiation beam of the passive receiver in a first direction and steers the radiation beam of the passive receiver in a second direction. The first direction is aligned with a direct signal path and the second direction aligned with a reflect signal path. The platform is of a first satellite and the direct signal path is aligned with a second satellite.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: October 19, 2021
    Assignee: United States of America as represented by the Administrator of NASA
    Inventor: Manohar Deshpande
  • Patent number: 11146426
    Abstract: A balancing circuit which may compensate for bandwidth attenuation introduced by interference between signals includes an amplifying circuit, a rising edge detection circuit and/or a falling edge detection circuit. By means of detecting the rising/falling edge of an original signal, the resulting pulse signal contains the phase information of a single “0” bit and a single “1” bit in the original signal, thus the phase of a rising edge or the phase of a falling edge of the original signal may be compensated respectively, so as to compensate for the high-frequency attenuation caused by interference between signals.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: October 12, 2021
    Assignee: XIAMEN UX HIGH-SPEED IC CO., LTD.
    Inventors: Ming Hong, Yonghui Lin, Faming Li, Zhiyang Chen