Interference Or Noise Reduction Patents (Class 375/346)
  • Patent number: 10353517
    Abstract: A method of processing raw response signals for capacitive sense arrays is performed at an electronic device having one or more processors and a capacitive sense array. The process receives a raw response signal from the capacitive sense array. The process computes an offset signal that represents an average baseline value of the raw response signal over a period of time and filters the raw response signal to a limited frequency band, thereby forming a bandwidth limited signal. The process also computes a differential signal as the difference between the offset signal and the bandwidth limited signal and uses the differential signal to detect an object proximate to the capacitive sense array.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: July 16, 2019
    Assignee: PARADE TECHNOLOGIES LTD.
    Inventor: Ross Martin Fosler
  • Patent number: 10355729
    Abstract: A single receiver to process multiple signals to achieve carrier aggregation includes a main path, an auxiliary path and one or more local oscillators. The main path has an input that receives an input signal. The input signal includes non-contiguous wanted signals and a jammer signal. The single receiver also includes an output coupled to a modem. The output provides the wanted signals to the modem. The auxiliary path is coupled to ground and includes an N-path filter. The N-path filter has multiple mixers. The N-path filter filters out at least a portion of the jammer signal in one or more gaps between the non-contiguous wanted signals in a same frequency band. The one or more local oscillators are coupled to the main path and/or the auxiliary path to provide a first reference signal to the main path and/or to the N-path filter of the auxiliary path.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: July 16, 2019
    Assignee: QUALCOMM Incorporated
    Inventor: Udara Fernando
  • Patent number: 10348364
    Abstract: In a system, known digital representations are generated, and test analog signals are generated using the known digital representations. The test analog signals are transmitted using a transmitter of a transmission system. The test analog signals are received using a receiver of the transmission system and used to generate test received digital representations. The test received digital representations are cross-correlated with the known digital representations to generate a mixing matrix. The mixing matrix is inverted to generate a de-mixing matrix, which is applied to subsequent digital data to be encoded onto a signal and transmitted by the transmitter to generate pre-compensated digital data.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: July 9, 2019
    Assignee: Roshmere, Inc.
    Inventors: Eduardo Temprana Giraldo, Nikola Alic
  • Patent number: 10342017
    Abstract: Wireless communication under IEEE 802.11 standards utilizing carrier specific interference mitigation where an AP or UE employs an ultra-wideband tuner to evaluate available spectrum between several communication bands. Rather than being constrained to communicate in a single communication band, the AP and UEs may utilize more than one communication band to communicate with one another. In doing so, the AP and UE search across several bands and measure interference on a carrier-by-carrier basis across those bands. Either of the AP and UE may select a cluster of carriers for communication, where the cluster of carriers may comprise 1) contiguous carriers in a single sub-channel, 2) contiguous carriers spanning across more than one sub-channel, 3) discontinuous carriers in a single sub-channel, or 4) discontinuous carriers spanning across more than one sub-channel. The mapping between a cluster and its carriers can be fixed or reconfigurable.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: July 2, 2019
    Assignee: NETGEAR, Inc.
    Inventor: Michael Clegg
  • Patent number: 10330924
    Abstract: A method for generating a control signal is provided. The method includes the steps of decomposing a desired movement into two partial movements which are separately equalized, and the desired control signal is obtained by summing up the corrected components. The first movement is a slowly (mostly linear) changing long-period (period T1) movement, and the second movement is a short-period (period T2) movement, wherein the period T1 is substantially longer than the period T2. The movements have to a large extent opposing temporal derivations which are nevertheless equal in magnitude so that their sum has a time derivative that is zero. In addition, a method is provided for operating a scanning unit periodically displaceable in an infeed direction by an infeed distance.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: June 25, 2019
    Assignee: Carl Zeiss Microscopy GmbH
    Inventors: Thomas Egloff, Volodymyr Kudryavtsev, Frank Klemm, Joerg Engel
  • Patent number: 10327255
    Abstract: A system that incorporates the subject disclosure may include, for example, a method for measuring a power level in at least a portion of a plurality of resource blocks occurring in a radio frequency spectrum, wherein the measuring occurs for a plurality of time cycles to generate a plurality of power level measurements, calculating a baseline power level according to at least a portion of the plurality of power levels, determining a threshold from the baseline power level, and monitoring at least a portion of the plurality of resource blocks for signal interference according to the threshold. Other embodiments are disclosed.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: June 18, 2019
    Assignee: ISCO International, LLC
    Inventors: Amr Abdelmonem, Mikhail Galeev, Sean S. Cordone, Zhigang Wang, Howard Wong, Jorge Seoane
  • Patent number: 10326625
    Abstract: A single-ended signal transmission system recovers a noise signal associated with a data input signal and uses the recovered noise signal to compensate for noise on the data input signal. The noise signal may be recovered from a noise reference signal line, or clock signal line, or a data signal line associated with a DC-balanced data input signal. The recovered noise signal may be represented as an analog signal or a digital signal. The recovered noise signal may be processed to compensate for DC offset and nonlinearities associated with one or more different input buffers. In one embodiment, the recovered noise signal includes frequency content substantially below a fundamental frequency for data transmission through the data input signal.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: June 18, 2019
    Assignee: NVIDIA Corporation
    Inventors: Nikola Nedovic, Brian Matthew Zimmer
  • Patent number: 10313096
    Abstract: A method for selecting, by a base station, HD mode or FD mode in a wireless communication system supporting an FDR scheme may comprise: a step of receiving, from a second terminal which receives interference from a first terminal, a value related to the signal to noise ratio (SNR) of the second terminal and a value related to the signal-to-interference-plus-noise ratio (SINR) of the second terminal; a step of measuring the SNR value and the SINR value of the base station; a step of calculating the channel capacity ratio between the HD mode and the FD mode by using the received value related to the SNR of the second terminal, the received value related to the SINR of the second terminal, the measured SNR value of the base station, and the measured SINR value of the base station; and a step of selecting either mode on the basis of the calculated channel capacity ratio between the HD mode and the FD mode.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: June 4, 2019
    Assignee: LG Electronics Inc.
    Inventors: Kwangseok Noh, Hyunsoo Ko, Kukheon Choi, Dongkyu Kim, Sangrim Lee
  • Patent number: 10305716
    Abstract: In a method of transmitting data between a transmitter and a receiver via two pairs of wires in a differential mode, the method comprises transmitting, from the transmitter to the receiver, related signals onto the two pairs of wires in respect of each tone in a first subset of tones and processing the received signals in dependence upon estimated channel transfer functions associated with both direct and crosstalk channels. The method further comprises transmitting, from the transmitter to the receiver, unrelated signals onto the two pairs of wires for each tone in a second subset of the tones, the unrelated signals being vector precoded before transmission and wherein a cut-off frequency and/or tone demarcates between the first and the second subsets of tones.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: May 28, 2019
    Assignee: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
    Inventors: Leslie Humphrey, Anas Al Rawi
  • Patent number: 10298383
    Abstract: Systems and methods are presented that offer significant improvements in the performance of time division duplex (TDD) systems by utilizing an adaptive synchronous protocol. Conventional TDD systems are limited because data is transmitted during discreet and limited intervals of time, and because TDD transceivers may not simultaneously transmit and receive for reasons of insufficiently separated frequencies and limited receiver selectivity. Typically, TDD systems have significant latency due to the time to change from transmission to reception and the propagation delay time. By synchronizing the master nodes and the one or more remotes and by scheduling the traffic loads between these nodes, remote nodes may begin transmitting before the master node is finished with its transmission, and vice versa. This method reduces latency and improves the frame efficiency. Further, the frame efficiency may improve as the distance from the master node to the remote node increases.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: May 21, 2019
    Assignee: Ubiquiti Networks, Inc.
    Inventors: Gary Schulz, Paul Odlyzko
  • Patent number: 10298459
    Abstract: A method includes: receiving a reservation, made by a user from a user terminal, regarding a bandwidth of a line; first determining whether or not a total bandwidth of a bandwidth demanded by the reservation in a time slot related to the received reservation and a guaranteed bandwidth to one or more reserved users exceeds a permissible upper limit value of the line; when the total bandwidth exceeds the permissible upper limit value, calculating a reducible bandwidth based on a bandwidth shortage produced by subtracting the permissible upper limit value from the total bandwidth and statistical information of a use bandwidth consumed by the one or more reserved users; second determining a reduction bandwidth reduced from the guaranteed bandwidth based on the calculated reducible bandwidth; and assigning, by a processor, the determined reduction bandwidth to the bandwidth demanded by the reservation.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: May 21, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Jun Tanaka, Toshio Sugimoto, Masanori Kimura, Kei Ohishi
  • Patent number: 10298504
    Abstract: The technologies disclosed herein provide improvements to the Low Extra Delay Background Transport (LEDBAT) protocol. Some aspects of the present disclosure introduce an adaptive congestion window gain for background connections. In some configurations, a gain value for influencing the transmission rate of a background connection is dynamically adjusted based on data indicating a round trip time (RTT). The RTT includes a sum of a time in which the data is communicated to a remote device and a time in which acknowledgement is data returned from the remote device. In some configurations, the gain is decreased when the RTT is below a threshold and the gain is increased when the RTT is above the threshold. Among other features, the present disclosure also provides techniques involving a modified slow-start, multiplicative decrease and periodic slowdowns. The features disclosed herein mitigate some existing issues, such as latency drift, inter-LEDBAT fairness, and unnecessary slowdowns.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: May 21, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Osman N. Ertugay, Christian Huitema, Praveen Balasubramanian, Daniel Havey
  • Patent number: 10291282
    Abstract: An RF transceiver front-end circuit includes an antenna, a first transceiving switch, a reception processing unit, a transmission processing unit and a transmission unit. The reception processing unit includes a low-noise amplifier, a first variable gain amplifier at a back-end circuit of the low-noise amplifier, and a first phase shifter at a back-end circuit of the first variable gain amplifier, wherein a phase of the first variable gain amplifier is constant. The transmission processing unit includes a power amplifier, a second phase shifter at a front-end circuit of the power amplifier, and a second variable gain amplifier at a front-end circuit of the second phase shifter, wherein a phase of the second variable gain amplifier is constant. The transmission unit includes a transmission line and a plurality of passive phase adjustors controlled to change a phase shifting angle of a signal on the transmission line.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: May 14, 2019
    Assignee: National Chi Nan University
    Inventors: Yo-Sheng Lin, Kai-Siang Lan
  • Patent number: 10284314
    Abstract: Channel state information is generated by a communication device. The device can determine that at least one uplink resource element of a radio frame is to be left unoccupied and perform at least one interference measurement on at least one downlink resource element coinciding with the at least one unoccupied uplink resource element, A channel state information report can then be generated based on the measurement, A network node may cause the communication device to leave at feast one uplink resource element of a radio frame unoccupied.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: May 7, 2019
    Assignee: Nokia Solutions and Networks Oy
    Inventors: Timo Erkki Lunttila, Esa Tapani Tiirola, Kari Juhani Hooli, Rapeepat Ratasuk
  • Patent number: 10284339
    Abstract: A receiver detects a plurality of information symbols. A first signal and a second signal are received from a first transmitted signal and a second transmitted signal, respectively, transmitted by a first plurality of antennas and received by a second plurality of antennas connected to the receiver. The second signal is received after the first signal. The receiver spatially filters the first signal using a spatial filter matrix. The receiver computes a conjugate of the first filtered signal to define a conjugate first signal, and spatially filters a second signal using the spatial filter matrix. The receiver computes a Hadamard product of the first filtered signal and the conjugate first signal to define a differential measurement signal. The receiver detects the plurality of information symbols from the differential measurement signal.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: May 7, 2019
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Akbar M. Sayeed, John H. Brady
  • Patent number: 10255339
    Abstract: A technique is disclosed for synchronizing first and second data sets stored in a data repository. A method includes triggering, by the data repository, in response to a commit order relating to an ongoing transaction requested by a client and instructing the data repository to apply data modification(s) on the first data set, transmission of a notification event message relating to the ongoing transaction to a data consistency controller. The method includes receiving, by the data repository, a notification event response message relating to the ongoing transaction from the data consistency controller, the notification event response message indicating to the data repository whether (i) to commit the data modification(s) instructed by the commit order on the first data set and corresponding data modification(s) on the second data set, or (ii) to roll back the data modification(s) instructed by the commit order on the first data set.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: April 9, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Antonio Alonso Alarcon, Bo Åström, David Castellanos Zamora, Jan Lemark
  • Patent number: 10230478
    Abstract: The invention relates to a system for interference cancellation and method thereof. The system includes a receiver, a transmitter, and a channel estimating and equalizing device. The transmitter and the receiver use different wireless communication technologies to transmit and receive data. The channel estimating and equalizing device can estimate the channel between the transmitter and the receiver for interference cancellation. The embodiments of the invention provide a system and a method thereof for reducing interferences generated when using one wireless communication technology to transmit signals but using another wireless communication technology to receive signals by using digital baseband signals.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: March 12, 2019
    Assignee: REALTEK SEMICONDUCTOR CORP.
    Inventors: Wu-Chi Wang, Yuan-Shuo Chang
  • Patent number: 10224971
    Abstract: A symbol rate estimating device includes: a power spectrum density (PSD) estimating unit, estimating a PSD of an input signal; an index searching unit, searching for a cut-off frequency index in the PSD; an adjacent channel interference (ACI) detecting unit, detecting whether the input signal has ACI to generate a detection signal; a threshold adjusting unit, generating an adjusted index number threshold according to the detection signal; an index output unit, outputting the cut-off frequency index according to the adjusted index number threshold; and a symbol calculating unit, calculating a symbol rate of the input signal according to the cut-off frequency index.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: March 5, 2019
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventors: Ting-Nan Cho, Kai-Wen Cheng, Tai-Lai Tung
  • Patent number: 10218224
    Abstract: This application includes systems and techniques relating to wireless power transfer, such as a system including: sensing and measurement circuitry configured to process signals associated with a resonator and an impedance matching network coupled with the resonator; a PWM (pulse width modulation) generator configured to control a driving signal to drive the resonator through the impedance matching network; and a controller coupled with the sensing and measurement circuitry, the controller configured to adjust operation of the PWM generator and operation of the impedance matching network based on measured signals from the sensing and measurement circuitry.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: February 26, 2019
    Assignee: WiTricity Corporation
    Inventors: Andrew J. Campanella, Herbert T. Lou, Morris P. Kesler, Katherine L. Hall, Ron Fiorello, Aristeidis Karalis
  • Patent number: 10200082
    Abstract: A method is disclosed for processing a received signal in the presence of an interference of a first type within the bandwidth of a desired signal of the received signal. The method comprises filtering the received signal using at least a first filter having at least a first filter characteristic to produce a filtered signal wherein the interference of the first type is suppressed. Furthermore, the method comprises determining a desired data stream from the filtered signal, basing the determination at least on the first filter characteristic. A method is also disclosed for processing a signal where the method comprises receiving an indication of whether interference of a first type is present in a frequency interval within the bandwidth of the signal, filtering the signal using at least a first filter having at least a first filter characteristic to produce a filtered signal wherein the filtered signal is suppressed in the frequency interval; and transmitting the filtered signal.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: February 5, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Bengt Lindoff, Anders Rosenqvist
  • Patent number: 10200085
    Abstract: A measurement instrument and associated method: receive at a first input an aggressor signal (e.g., a supply voltage) from a device under test (DUT); capture samples of the aggressor signal; receive at a second input a victim signal from the DUT, wherein the received victim signal includes jitter induced thereon from the aggressor signal; capture samples of the received victim signal; apply the captured samples of the aggressor signal and the captured samples of the received victim signal to a predetermined model, which represents the jitter induced onto the received victim signal from the aggressor signal, to produce a system of equations; ascertain a plurality of unknown parameters in the predetermined model from the system of equations; and apply the predetermined model with the ascertained parameters to the captured samples of the aggressor signal to estimate the jitter induced onto the received victim signal from the aggressor signal.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: February 5, 2019
    Assignee: Keysight Technologies, Inc.
    Inventors: David L. Gines, Steven Draving
  • Patent number: 10194443
    Abstract: A transmitter of the present disclosure includes: an output terminal; a driver that performs transition of a voltage of the output terminal among a plurality of voltages; and a controller that controls the driver to cause transition start timing in one voltage transition in voltage transition among the plurality of voltages to be later than transition start timing in another voltage transition.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: January 29, 2019
    Assignee: Sony Corporation
    Inventor: Takanori Saeki
  • Patent number: 10187098
    Abstract: A passive intermodulation detection system is provided to remotely identify passive intermodulation at a base station site and diagnose the type of intermodulation and location of the non-linearity that is the source of the passive intermodulation. A passive intermodulation cancelation system can generate an equivalent signal to a received interference signal and use the equivalent signal to generate an error signal. The error signal can then be used to reinforce a learning system and converge on a steady state of the interference signal to cancel other interference signals.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: January 22, 2019
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Ernest Tsui, Paul Maxwell, Weihua Ye
  • Patent number: 10171119
    Abstract: A method, system and computer readable medium for transmitting data and feedback over a noisy feedforward channel and a noisy feedback channel.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: January 1, 2019
    Assignee: RAMOT AT TEL AVIV UNIVERSITY
    Inventors: Ofer Shayevitz, Assaf Ben-Yishai
  • Patent number: 10165559
    Abstract: The present invention relates to a receiver circuitry and an evaluation method in a receiver circuitry for controlling a decoding of a plurality of control channel message candidates by selecting control channel message candidates based on a quality measure control channel message candidates for decoding of a received control channel message (S150). The quality measure is computed for a DMRS candidate based on an extracted signal sequence and a calculated DMRS sequence (S140).
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: December 25, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Karl Werner, Henrik Sahlin
  • Patent number: 10164799
    Abstract: The present disclosure relates to a remote radio unit (RRU), which is connected to a baseband unit (BBU) and an antenna, comprising: a service transmit channel configured to transmit a first correction signal through the antenna, and a standing wave detecting circuit associated with the service transmit channel, wherein: a working frequency of the standing wave detecting circuit is consistent with the service transmit channel, and the standing wave detecting circuit is capable of detecting a standing wave ratio of the service transmit channel and is configured to receive a correction signal looped back by the antenna, and send the correction signal looped back by the antenna to the BBU, wherein the correction signal looped back by the antenna comprises a portion of the first correction signal reflected by the antenna and is used for a calculation of a correction coefficient of the service transmit channel.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: December 25, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xiongshu Yi, Chaochao Zhang, Lu Guan, Yun Liu
  • Patent number: 10164675
    Abstract: Wideband digital distributed communications systems (DCSs) employing reconfigurable digital signal processing circuit for scaling supported communications services are disclosed. The DCS includes a head-end unit that includes front end downlink signal processing circuit to receive and distribute downlink communications signals for communications services (i.e., communications bands) to remote units. The remote units also include front end uplink signal processing circuits to receive uplink communications signals to be distributed to the head-end unit. The front end signal processing circuits are either equipped with broadband filters, or such filters are eliminated, to allow the DCS to be scaled to pass added communications bands.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: December 25, 2018
    Assignee: Corning Incorporated
    Inventors: Solomon Tesfay Abraha, Chun-Hung Ho, Anthony Ng'Oma
  • Patent number: 10164683
    Abstract: One disclosure of the present specification provides a method for receiving interference cancellation.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: December 25, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Yoonoh Yang, Sangwook Lee, Suhwan Lim, Manyoung Jung, Jinyup Hwang
  • Patent number: 10158445
    Abstract: Method and apparatuses are disclosed to substantially compensate for various unwanted interferences and/or distortions within a communications receiver. Each of these apparatuses and methods estimate the various unwanted interferences and/or distortions within the communications receiver. Each of these apparatuses and methods remove the estimates of the various unwanted interferences and/or distortions within the communications receiver from one or more communications signals within the communications receiver to substantially compensate for the various unwanted interferences and/or distortions.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: December 18, 2018
    Assignee: Avago Technologies International Sales Pte. Limited
    Inventors: Ramon Alejandro Gomez, Bruce J. Currivan, Massimo Brandolini, Young Shin, Francesco Gatta, Hanli Zou, Loke Kun Tan, Lin He, Thomas Joseph Kolze, Leonard Dauphinee, Robindra Joshi, Binning Chen
  • Patent number: 10141989
    Abstract: An embodiment method for beamforming feedback includes receiving a sounding packet for a beamforming transmission, performing planar rotation in accordance with the sounding packet to generate phi and psi angle values, quantizing the phi and psi angle values to a same bit resolution, and feeding back the quantized phi and psi angle values.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: November 27, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jung Hoon Suh, Jun Zhu, Osama Aboul-Magd
  • Patent number: 10110296
    Abstract: Systems, algorithms and methods for reclaiming unused portions of a satellite broadcast service's bandwidth for new services, utilizing higher performance coding techniques to yield better throughput, are presented. Reclamation of bandwidth can be achieved in a way that is invisible to a legacy receiver, and that does not interfere with its reception of a legacy signal. New data may be transmitted within a legacy transmission frame, for example within its cluster structure, using the same modulation and synchronization as used for the legacy data. In other embodiments, one or more clusters or subdivisions with only new data may be transmitted, using the same or different modulation and synchronization as the legacy data clusters, but now employing a higher performing FEC and data interleaving structure on those clusters which contain only new data to yield an increase in available throughput.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: October 23, 2018
    Assignee: Sirius XM Radio Inc.
    Inventors: Edward Schell, Carl Scarpa, John Goslin
  • Patent number: 10111181
    Abstract: Disclosed is a receiver for enhancing estimation of a channel of a received signal. The receiver is being configured to (i) process at least one of (a) power control commands to obtain a pattern of processed power control commands or (b) phase estimation to obtain a pattern of processed phase estimation; (ii) match the pattern of at least one of (a) processed power control commands, or (b) processed phase estimation to a pattern corresponding to one or more channels; (iii) determine a type of channel of the one or more channels based on the matched pattern of at least one of (a) said processed power control commands, or (b) said processed phase estimation, (iv) determine filtering parameters based on a type of channel that is determined and (v) enhance estimation of the channel based on the filtering parameters associated with the type of channel that is determined.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: October 23, 2018
    Inventor: Aravind Ganesan
  • Patent number: 10111252
    Abstract: A method implemented in a user equipment (UE) for adjusting for propagation delay includes transmitting one or more preamble sequence sequences to a network node. The method further includes recording a response result for each preamble sequence transmitted to the network node. The method includes analyzing each response result to determine whether a propagation delay condition exists. If the propagation delay condition exists, the method includes adjusting a timing of a preamble sequence transmission in accordance with a time shift or monitoring for a preamble sequence in accordance with the time shift.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: October 23, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Erik Eriksson, Fredrik Gunnarsson, Riikka Susitaival
  • Patent number: 10097254
    Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a phase noise correction reference signal (PC-RS) and a channel state information reference signal (CSI-RS) during a symbol period of a subframe. A user equipment (UE) may identify a first channel information using the PC-RS and the CSI-RS. The UE may transmit a channel information message to the base station that includes the first channel information. The first channel information may include a phase noise corrected channel measurement. The UE may the CSI-RS during the symbol period. Channel and phase noise estimates may be generated using a joint estimation based on the CSI-RS. The CSI-RS may be repeated periodically. In some cases, the UE may additionally or alternatively receive pilot tones that may include PC-RSs. The joint estimation may be further based on the pilot tones.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: October 9, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Muhammad Nazmul Islam, Krishna Kiran Mukkavilli, Juergen Cezanne, Tao Luo, Sundar Subramanian, Junyi Li
  • Patent number: 10098126
    Abstract: Method performed by a transmitting device for transmitting a block to a receiving device, both devices operating in a wireless communications network. The block comprises four bursts, which further comprise fields for Uplink State Flags (USF), Stealing Flags (SF), and data/header bits. In a first block format, USF and SF fields are interleaved and mapped over the four bursts, while data/header fields are interleaved over one burst but repeated over the four bursts. The data/header fields are overlapping with and overridden by bits from the USF field in different positions in each burst. The receiving device can receive the transmitted block and, if it is determined that the block format corresponds to the first block format, can correct a frequency offset of the receiving device in relation to the transmitting device based on the plurality of data/header bits received in at least one pair of consecutive bursts.
    Type: Grant
    Filed: April 11, 2018
    Date of Patent: October 9, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Mårten Sundberg, Stefan Eriksson Löwenmark, Olof Liberg
  • Patent number: 10084618
    Abstract: A transmission circuit, mounted on a printed board and having attenuation characteristics, to attenuate an amplitude of a reception signal according to the attenuation characteristics, and to transmit the amplitude-attenuated reception signal, as an attenuation signal; and a correction circuit, mounted on the printed board and having correction characteristics, to attenuate an attenuation signal that has been received from the transmission circuit according to the correction characteristics, and to transmit the attenuation signal attenuated, as a correction signal are provided. The attenuation characteristics are such characteristics that the ratio of the amplitude of the attenuation signal to the amplitude of the reception signal decreases as the frequency of the reception signal increases. The correction characteristics are characteristics with which the ratio of the amplitude of the correction signal to the amplitude of the attenuation signal increases as the frequency of the attenuation signal increases.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: September 25, 2018
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Satoru Ishizaka, Yoshiyuki Kusano, Takahiro Ito, Yoshimitsu Tawarayama
  • Patent number: 10084564
    Abstract: One embodiment of the present specification discloses a method by which a serving cell transmits support information for removing interference of a terminal. The method comprises: a step for determining, by the serving cell, a downlink timing offset with neighboring interference cells; and a step for to determining, by the serving cell, a channel corresponding to an interference removal target among neighboring interference cells according to the timing offset. Here, the channel to have interference removed can be the channel interfering in a control channel for the serving cell according to the timing offset. The method further includes a step for enabling the serving cell to generate the interference removal support information on the determined channel and transmit the generated information to a terminal.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: September 25, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Suhwan Lim, Sangwook Lee, Jinyup Hwang, Manyoung Jung, Yoonoh Yang
  • Patent number: 10084495
    Abstract: A method for frequency- and time-selective interference suppression for a communication system based on OFDM, and a receiver therefor. To achieve a much lower bit error rate at the output of the receiver or to permit greater interference or a lower signal-to-noise ratio (in a prior art L-DACS1 receiver, at least 45 nautical miles) for the same transmission power, the invention provides: a filter bank pulse blanking method FBPB in which the sampled received signal is applied to a blanking unit for frequency-selective pulse blanking, which blanking unit consists of an analysis filter bank having M sub-bands; a module for frequency-selective pulse blanking of the sub-band signals; and a synthesis filter bank, which reassembles the signal. The analysis filter bank, which breaks down the received signal into multiple sub-bands on a frequency-selective basis, is used before OFDM windowing, such that the sub-band breakdown applies pulse blanking on a sub-band-selective basis.
    Type: Grant
    Filed: January 30, 2016
    Date of Patent: September 25, 2018
    Assignee: IAD GESELLSCHAFT FÜR INFORMATIK, AUTOMATISIERUNG UND DATENVERARBEITUNG MBH
    Inventors: Hermann Hampel, Ulrich Berold, Martin Hirschbeck
  • Patent number: 10075229
    Abstract: A method in a main node for communication with a destination node over long distances. Use of at least one communications resource is synchronized with an auxiliary node. A main signal and an auxiliary signal are generated from an information quantity. The main signal is transmitted to the destination node by the at least one synchronized communications resource. The auxiliary signal is transmitted to the auxiliary node by the at least one synchronized communications resource.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: September 11, 2018
    Assignee: SAAB AB
    Inventors: Anders Bäckman, Morgan Andersson
  • Patent number: 10069587
    Abstract: In aspects, apparatus and methods of wireless communication, and more specifically of improved mitigation of interference caused by a transmitter are provided. For example, in aspects, a method of interference mitigation of wireless communication is provided including transmitting at least one transmit signal from at least one transmit chain of a user equipment (UE) over a wireless medium, receiving a composite signal that includes a desired receive signal transmitted from a device and a distortion signal, generating a modified composite signal by removing at least a portion of the desired receive signal from the composite signal, generating a distortion signal estimate based on the modified composite signal, and canceling the distortion signal estimate from the composite signal. Numerous other aspects are provided.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: September 4, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Roberto Rimini, Sheng-Yuan Tu, Nicola Varanese
  • Patent number: 10050659
    Abstract: A system and method for non-linear digital self-interference cancellation including a pre-processor that generates a first pre-processed digital transmit signal from a digital transmit signal of a full-duplex radio, a non-linear transformer that transforms the first pre-processed digital transmit signal into a non-linear self-interference signal according to a transform configuration, a transform adaptor that sets the transform configuration of the non-linear transformer, and a post-processor that combines the non-linear self-interference signal with a digital receive signal of the full-duplex radio.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: August 14, 2018
    Assignee: Kumu Networks, Inc.
    Inventors: Jung-Il Choi, Mayank Jain, Jeff Mehlman, Steven Hong
  • Patent number: 10045240
    Abstract: Provided is a frame transmission method of interference alignment (IA) and controlling, the method including calculating a channel matrix of a basic service set (BSS) by measuring channel information between an access point and a user terminal, performing singular value decomposition (SVD) based on the calculated channel matrix, selecting a beamforming vector in consideration of an interference amount associated with another access point based on the SVD performed by the channel matrix, and calculating a leakage interference (LIF) value based on the selected beamforming vector.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: August 7, 2018
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jin Hyung Oh, Bang Chul Jung, Hu Jin, Myung Sun Song
  • Patent number: 10044388
    Abstract: A method is disclosed of a communication device adapted to process a received signal using either of a first channel selection filter and a second channel selection filter, where the received signal comprises signal entities each representing an individually processed block of data. The method comprises (during use of the first channel selection filter) detecting a presence of an interference signal outside a pass band of the first channel selection filter and switching to use of the second channel selection filter in response to detecting the presence of the interference signal. The method also comprises (if the switching occurs at a first point in time within a first signal entity dividing the first signal entity into a first part and a second part) applying a time domain compensation filter to one of the first part and the second part of the first signal entity. Corresponding computer program product, receiver arrangement and communication device are also disclosed.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: August 7, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Leif Wilhelmsson, Dzevdan Kapetanovic, Michal Stala
  • Patent number: 10038585
    Abstract: Embodiments relate to a receiver (310) for receiving a multicarrier signal. The multicarrier signal comprises a first frequency block with a first group of subcarriers, the first frequency block being filtered with a first frequency block specific sideband suppression filter (106-1) for sideband suppression outside of said first frequency block, and at least a second frequency block with at least a second group of subcarriers, the second frequency block being filtered with a second frequency block specific sideband suppression filter (106-2) for sideband suppression outside of said second frequency block. The receiver (310) comprises a filter module (320) operable to perform an inverse sideband suppression filter operation for the first and at least the second frequency block.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: July 31, 2018
    Assignee: Alcatel Lucent
    Inventors: Thorsten Wild, Frank Schaich
  • Patent number: 10038462
    Abstract: A method of sparse digital cancellation of receiver nonlinear distortion in carrier aggregation systems is proposed. A reference signal generator generates possible candidate reference signals to be included in a dictionary matrix D. A sparsity-based solution is then applied to dynamically select reference signals based on the RF transceiver configuration. Based on the auto-correlation and cross-correlation with an observed radio signal, a subset of reference signals is selected from the dictionary matrix to match the distortion signal. The number of selected reference signals is flexibly determined based on the design constraints on complexity and power consumption. A greedy sparse estimation approaches, e.g., Orthogonal Matching Pursuit (OMP) can be used for reference signal selection. The reference signal selection is dynamic and adapts itself for different channel responses through correlating the observed radio signal with the dictionary reference signals.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: July 31, 2018
    Assignee: MEDIATEK INC.
    Inventors: Ahmad Gomaa, Charles Chien, Ming Lei, Chih-Yuan Lin, Chun-Ying Ma
  • Patent number: 10034289
    Abstract: Wireless communication under IEEE 802.11 standards utilizing carrier specific interference mitigation where an AP or UE employs an ultra-wideband tuner to evaluate available spectrum between several communication bands. Rather than being constrained to communicate in a single communication band, the AP and UEs may utilize more than one communication band to communicate with one another. In doing so, the AP and UE search across several bands and measure interference on a carrier-by-carrier basis across those bands. Either of the AP and UE may select a cluster of carriers for communication, where the cluster of carriers may comprise 1) contiguous carriers in a single sub-channel, 2) contiguous carriers spanning across more than one sub-channel, 3) discontinuous carriers in a single sub-channel, or 4) discontinuous carriers spanning across more than one sub-channel. The mapping between a cluster and its carriers can be fixed or reconfigurable.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: July 24, 2018
    Assignee: NETGEAR, Inc.
    Inventor: Michael Clegg
  • Patent number: 10027459
    Abstract: Wireless communication under IEEE 802.11 standards utilizing carrier specific interference mitigation where an AP or UE employs an ultra-wideband tuner to evaluate available spectrum between several communication bands. Rather than being constrained to communicate in a single communication band, the AP and UEs may utilize more than one communication band to communicate with one another. In doing so, the AP and UE search across several bands and measure interference on a carrier-by-carrier basis across those bands. Either of the AP and UE may select a cluster of carriers for communication, where the cluster of carriers may comprise 1) contiguous carriers in a single sub-channel, 2) contiguous carriers spanning across more than one sub-channel, 3) discontinuous carriers in a single sub-channel, or 4) discontinuous carriers spanning across more than one sub-channel. The mapping between a cluster and its carriers can be fixed or reconfigurable.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: July 17, 2018
    Assignee: NETGEAR, Inc.
    Inventor: Michael Clegg
  • Patent number: 10021655
    Abstract: Systems and methods for controlling the transmit power and the receive sensitivity of an access point for achieving symmetric link balancing is described. When an access point operates with symmetric link performance, the access point does not inefficiently use available bandwidth for transmitting or re-transmitting to a client station that cannot communicate with the access point. Moreover, the access point does not back off transmissions due to activity of neighboring basic service sets when not needed. The receive sensitivity can be controlled using a hardware attenuator or software commands that adjust a programmable gain in a wireless local area network chipset used by the access point, or it can be controlled using adjustable levels in the software for processing or responding to packets.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: July 10, 2018
    Assignee: NETGEAR, INC.
    Inventors: Joseph Amalan Arul Emmanuel, Peiman Amini
  • Patent number: 10015817
    Abstract: According to an example implementation, a method includes: receiving, at an apparatus, information from a node, the information defining a mode of operation for communicating scheduling information; and configuring transmission and reception periods of scheduling information at the apparatus in dependence on the mode of operation.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: July 3, 2018
    Assignee: Nokia Solutions and Networks Oy
    Inventors: Kari Pekka Pajukoski, Esa Tapani Tiirola, Jaakko Eino Ilmari Vihriala, Eeva Lahetkangas, Ilkka Harjula
  • Patent number: 10009894
    Abstract: A plurality of different OFDM tone blocks for a wireless local area network (WLAN) communication channel are assigned to a plurality of devices. An OFDMA data unit is generated, the OFDMA unit including a preamble portion and a data portion, the preamble portion having at least i) a first legacy portion that corresponds to at least a first OFDM tone block, ii) a second legacy portion that corresponds to a second OFDM tone block, iii) a first non-legacy portion that corresponds to the first OFDM tone block, iv) a second non-legacy portion that corresponds to the second OFDM tone block, and v) a third non-legacy portion that corresponds to a third OFDM tone block. The first OFDM tone block and the second OFDM tone block are separated in frequency by at least the third OFDM tone block.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: June 26, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Yakun Sun, Hui-Ling Lou, Liwen Chu