Signal Noise Patents (Class 375/227)
  • Patent number: 10715212
    Abstract: Cable network test instruments are disclosed. The test instruments are configured to collect signal data at a node from a cable network system and analyze the collected data to determine whether intermittent noise is present. Methods of locating intermittent noise are also disclosed.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: July 14, 2020
    Assignee: VIAVI SOLUTIONS INC.
    Inventors: Cinna Soltanpur, Brian Swanson
  • Patent number: 10680723
    Abstract: A measuring device comprising a channel simulator is provided. The channel simulator is adapted to simulate multipath propagation by modifying a first measuring signal, using a plurality of taps defined by tap parameters, resulting in a second measuring signal. The measuring device moreover comprises a parameter modifier, adapted to modify input tap parameters, resulting in the tap parameters.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: June 9, 2020
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventor: Stefan Schmidt
  • Patent number: 10601463
    Abstract: Methods and systems are provided for telephone line access with crosstalk stability. A transceiver device coupled to a telephone line, bundled with other telephone lines in a telephone cable, may determine when another transceiver device connected to the telephone cable is estimating signal to noise ratio on another telephone line in the telephone cable, and may control communications over on the telephone line, the controlling including forcing a transmission on the telephone line based on the estimation of signal to noise ratio by the other transceiver device. The transmission may be forced on the telephone line when there is no data to send on the telephone line at a time when the other transceiver device estimates the signal to noise ratio. The forced transmission may be generated by modulating sub-carriers using a pseudo-random sequence generated with an initial seed different from initial seeds used by other transceiver devices.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: March 24, 2020
    Assignee: MAXLINEAR ASIA SINGAPORE PRIVATE LIMITED
    Inventors: Antonio Salas Moreno, Ignacio Cardama Sierra, Agustin Badenes Corella, Antonio Jimenez de Parga Bernal
  • Patent number: 10601612
    Abstract: The present disclosure relates to methods, a device and a system for evaluation of channel estimate. One method is performed in a first access point arranged to communicate with one or more wireless devices through information streams that are created using multiple co-located antennas. The method comprises transmitting or receiving a packet A, to/from, the first wireless device, wherein the packet A is transmitted using a precoder determined using the channel estimate, retrieving information about possibly interfering transmissions C between further access points in the vicinity of the first access point, and respective second wireless devices; wherein the information comprises location information and timing information related to the possibly interfering transmissions, determining spatial separations between the transmissions A and C and evaluating the channel estimate, based on the determined spatial separations.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: March 24, 2020
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Dzevdan Kapetanovic, Rocco Di Taranto
  • Patent number: 10591319
    Abstract: The invention relates to a method for counting revolutions of a wheel (6) to which a target (7) is attached, the counting method comprising the step of: generating an oscillating signal representing the presence or the absence of the target (7); comparing an amplitude of the signal with a voltage threshold in order to obtain pulses (19); and detecting the presence of the target (7) or the absence of the target on the basis of the number of pulses obtained. The method also comprises a step of detecting a disruption which is implemented as feedback and which consists in acquiring differential pulse values each equal to a difference between two numbers of pulses obtained during two consecutive detection intervals, and in detecting a disruption upon identifying an erroneous sequence of consecutive differential pulses. A consumption meter and a computer program corresponding to the method and means for storing such a program are also claimed.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: March 17, 2020
    Assignee: SAGEMCOM ENERGY & TELECOM SAS
    Inventor: Henri Teboulle
  • Patent number: 10587435
    Abstract: A technique for determining channel coefficients for a first array of antennas coupled through respective first phase shifters to a first radio chain and a second array of antennas coupled through respective second phase shifters to a second radio chain is described. As to a method aspect of the technique, pairs of first and second phase vectors are applied to the first and second phase shifters, respectively. Each of the pairs defines complementary directional gains at the first and second arrays for receiving reference signals. A channel estimation is performed in each of the first and second radio chains for each of the pairs based on the received reference signals. Based on the channel estimations for each of the pairs, at least one channel coefficient for the antennas in each of the first and second arrays is determined.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: March 10, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Wanlu Sun, Stefano Sorrentino
  • Patent number: 10523478
    Abstract: A radio frequency (RF) transmitter includes a set of input ports to receive baseband samples of a signal to be transmitted on a set of disjoint frequency bands, a set of filter banks, there is one filter bank for each input port, each filter bank includes a plurality of digital polyphase interpolation filters to sample a shifted phase of the corresponding sequence of baseband samples and to interpolate the sampled phases to produce a plurality of sequences of interpolated baseband phased samples with the shifted phase, and a set of oscillators banks, each oscillator bank includes a plurality of polyphase Digital Direct Synthesizer (DDS) corresponding to the plurality of digital polyphase interpolation filters to generate a plurality of sequences of samples of digital waveform.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: December 31, 2019
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Rui Ma, Daniel Antonio Da Costa Dinis, Yukimasa Nagai
  • Patent number: 10462675
    Abstract: An eNodeB uses a first portion of a frequency spectrum as a primary cell and uses a second portion of the frequency spectrum as a secondary cell that is dynamically shared with a 5G base station. The eNodeB and the 5G base station communicate to dynamically share the second portion of the frequency spectrum.
    Type: Grant
    Filed: March 6, 2016
    Date of Patent: October 29, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Arunabha Gosh, David R. Wolter
  • Patent number: 10454571
    Abstract: Dynamic determination of threshold power level for use in distinguishing between downlink and uplink periods in time-division duplexed (TDD) communications. For example, downlink and uplink periods may be distinguished in TDD communications in a distributed communications system (DCS), such as a distributed antenna system (DAS). Detecting a power level in a TDD communications signal less than the threshold power level is used to identify uplink periods in the TDD communications signal. In this manner, TDD communications circuits involved with transmitting TDD communications signals can synchronize their transmission circuitry to only transmit downlink TDD communications signals in downlink periods and receive uplink TDD communications signals in uplink periods.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: October 22, 2019
    Assignee: Corning Optical Communications LLC
    Inventors: Amit Gutman, Guy Lupescu
  • Patent number: 10367665
    Abstract: A radio analyzer includes a memory configured to store a first reference signal, and a processor coupled to the memory and configured to calculate a first correlation value between a received wave and a non-modulated wave, calculate a second correlation value between the received wave and the first reference signal in a target section of the received wave, the first correlation value being smaller than a first threshold value in the target section, and detect a modulated wave from the received wave based on the second correlation value.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: July 30, 2019
    Assignee: FUJITSU LIMTED
    Inventors: Tatsuya Kikuzuki, Teruhisa Ninomiya
  • Patent number: 10368365
    Abstract: Methods, systems, and devices for wireless communication are described that support time mask techniques for shortened transmission time intervals (sTTIs) that may enhance low latency communications. Time masks may be identified and applied for transmissions that use sTTIs, in a manner that provides increased portions of sTTI durations having higher transmission power, and thus increase the likelihood of successful reception of such transmissions at a receiver. In some cases, a transmitter, such as a user equipment (UE), may identify one or more sTTIs for transmissions of a first wireless service (e.g., an ultra-reliable low-latency communication (URLLC) service). An sTTI may be identified based on a duration of a TTI associated with the first wireless service being below a threshold duration (e.g., a TTI duration of less than 1 ms may be identified as an sTTI).
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: July 30, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Prashanth Akula, Seyedkianoush Hosseini, Wanshi Chen, Amir Farajidana
  • Patent number: 10361797
    Abstract: A wireless radio tester for testing a device under test is provided. The wireless radio tester comprises a generation unit for transmitting a transmit waveform to the device under test, a measurement unit for receiving and analyzing a receive signal received from the device under test, a processing unit for triggering the measurement unit by interframe space marker information, and a IQ data memory configured to provide IQ data for the generation unit in order to form the transmit waveform. In this context, said IQ data comprises an interframe space marker according to the interframe space marker information.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: July 23, 2019
    Assignee: ROHDE & SCHWARZ GMBH & CO. KG
    Inventor: Ralph Spitschka
  • Patent number: 10356736
    Abstract: A circuit arrangement may include an analog-to-digital-converter (ADC) configured to convert an analog signal into a digitized signal having an ADC frequency, a decimation circuit configured to provide a first signal having a sampling frequency based on the digitized radio signal having the ADC frequency. The sampling frequency is smaller than the ADC frequency. The circuit arrangement may further include a timer circuit providing a second signal having a timer frequency and a timing control signal to control the timing of the decimation circuit, and a difference determination circuit configured to determine a phase difference between the second signal and the first signal.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: July 16, 2019
    Assignee: Intel IP Corporation
    Inventors: Steffen Reinhardt, Peter Bode
  • Patent number: 10355762
    Abstract: A wireless communication system includes a controller to control a plurality of antenna subarrays of a first wireless communication device to form a plurality of directional beams to communicate a beamformed diversity wireless transmission between the first wireless communication device and a set of second wireless communication devices over a plurality of communication channels. The controller assigns at least some antenna subarrays to at least some second wireless communication devices using a greedy optimization with a relaxation parameter and controls the plurality of antenna subarrays according to the assignment.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: July 16, 2019
    Assignee: Mitsubishi Electric Research Laboratories, Inc
    Inventors: Kyeong Jin Kim, Philip Orlik
  • Patent number: 10334466
    Abstract: A network device includes: a transceiving module, configured to: send control information to a target terminal to instruct the target terminal to measure a first spectrum, where the first spectrum is an unlicensed spectrum for the network device; and receive feedback information that is reported by the target terminal and obtained by measuring the first spectrum; and a processing module, configured to determine, according to the feedback information received by the transceiving module, whether the first spectrum is free.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: June 25, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Lili Zhang
  • Patent number: 10333660
    Abstract: A method is implemented by a first radio node (30) for determining a rate at which units of data are received erroneously from one or more second radio nodes. The method comprises inspecting (110) data units received from the one or more second radio nodes for errors. The method also includes making (120) successive determinations of the rate at which data units are received erroneously from the one or more second radio nodes. Each determination must be made based on inspecting at least a minimum number of received data units for errors. The method further entails adapting (130) the minimum number of data units that must be inspected across determinations of different rates, such that determinations of different rates must be respectively made based on inspecting different minimum numbers of received data units for errors.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: June 25, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Muhammad Kazmi, Iana Siomina
  • Patent number: 10333687
    Abstract: Disclosed are a method and apparatus for interference alignment based on codebook design and selection. The method includes: a codebook set including codebooks of different sizes of a precoding matrix is pre-designed or pre-stored; a receiver or a transmitter selects a codebook satisfying a specified condition from the codebook set to explicitly or implicitly notify the opposite end; the receiver designs, based on obtained ideal CSI and an interference alignment condition, a precoding matrix V and a receiving matrix U for interference alignment; the receiver selects a matrix V? having the highest similarity to V from the current codebook to serve as a finally quantized precoding matrix V?; the receiver calculates, based on V?, U again to obtain a receiving matrix U? according to the interference alignment condition; and the transmitter transmits a signal according to feedback information and V?, and the receiver filters the signal according to U?.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: June 25, 2019
    Assignee: ZTE Corporation
    Inventors: Chaowei Wang, Chen Huang, Cheng Wang, Nan Li, Mingxia Cao, Tian Cai, Yihuai Zhang
  • Patent number: 10263682
    Abstract: The present disclosure generally discloses a channel state prediction capability. In a communication system including a transmitter and a receiver communicating via a communication channel, the channel state prediction capability may enable the transmitter to transmit to the receiver via the communication channel based on a predicted channel state of the communication channel. The predicted channel state may be a prediction of the channel state at a future time at which data transmitted by the transmitter is expected to be received by the receiver, which may be based on a total round trip latency of the communication channel. The predicted channel state may include one or more parameters (e.g., a predicted channel quality indicator, a predicted rank indicator, or the like). The predicted channel state may be predicted based on predictions of channel state factors which may impact the channel state of the communication channel (e.g., path loss, shadow fading, fast fading, or the like).
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: April 16, 2019
    Assignee: Nokia of America Corporation
    Inventor: Ashok Rudrapatna
  • Patent number: 10237838
    Abstract: A method for improving the accuracy of synchronization between base stations even when the propagation path condition between the base stations is poor or when noises are large is provided. A base station (100) according to the present invention includes a communication unit (10) configured to receive a first reference signal transmitted from a first base station (101) and a second reference signal transmitted from a communication device (102) different from the first base station (101), and an execution unit (20) configured to obtain synchronization between the base station (100) and the first base station (101) based on the first and second reference signals.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: March 19, 2019
    Assignee: NEC CORPORATION
    Inventor: Tomozou Tanaka
  • Patent number: 10236944
    Abstract: One or more communication channels may be setup for communicating between a first transceiver from a plurality of transceivers in a transportation object and a network transceiver of a communication network that is in proximity to the transportation object. Channel related data may be determined for the first transceiver; and the determined channel related data may be determined to a second transceiver that is determined to come within communication range of the network transceiver due to movement of the transportation object. The channel related data may then be used for communicating via the one or more communication channels with the second transceiver. Cooperative communication schemes may be used when communication via the one or more communication channels. The cooperative communication schemes may comprise use of one or both of spatial diversity and spatial multiplexing.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: March 19, 2019
    Assignee: SWISSCOM AG
    Inventor: Thomas Zasowski
  • Patent number: 10187232
    Abstract: A radio frequency (RF) transmitter includes a set of input ports to receive baseband samples of a signal to be transmitted on a set of disjoint frequency bands, a set of filter banks, there is one filter bank for each input port, each filter bank includes a plurality of digital polyphase interpolation filters to sample a shifted phase of the corresponding sequence of baseband samples and to interpolate the sampled phases to produce a plurality of sequences of interpolated baseband phased samples with the shifted phase, and a set of oscillators banks, each oscillator bank includes a plurality of polyphase Digital Direct Synthesizer (DDS) corresponding to the plurality of digital polyphase interpolation filters to generate a plurality of sequences of samples of digital waveform.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: January 22, 2019
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Rui Ma, Daniel Antonio Da Costa Dinis, Koon Hoo Teo, Philip Orlik
  • Patent number: 10177939
    Abstract: A base station includes a channel estimator, a scheduler, and a controller. The channel estimator estimates a channel matrix with respect to each of a plurality of terminals. The scheduler determines a transmission weight corresponding to each of the plurality of terminals on the basis of the channel matrix that is estimated by the channel estimator such that the transmission weight is orthogonal to a current channel matrix and a past channel matrix of a terminal that is a subject of interference. The controller controls, when the transmission weight is determined by the scheduler, the number of samples of the current channel matrix and the past channel matrix to which the transmission weight is to be orthogonal with respect to each of the terminals.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: January 8, 2019
    Assignee: FUJITSU LIMITED
    Inventor: Takashi Seyama
  • Patent number: 10164727
    Abstract: A method for allocating time slots of a shared schedule for a plurality of communication lines having a crosstalk relationship is described. A first number of allocated time slots is allocated, according to respective priorities, corresponding to a first time interval for first data to be transmitted. The first data is transmitted. A second number of allocated time slots is allocated, corresponding to a second time interval for second data to be transmitted. The second number is larger than the first number if an allocation increase threshold has been met, based on utilization of a first time slot having a lowest priority of the first number of allocated time slots. The second number is smaller than the first number if an allocation decrease threshold has been met, based on utilization of a second time slot having a higher priority than the first time slot.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: December 25, 2018
    Assignee: Marvell International Ltd.
    Inventors: Agustin Badenes Corella, Feliciano Gomez Martinez
  • Patent number: 10153544
    Abstract: An electronic device and a protective housing are described. The electronic device has a housing body that includes a plurality of first component units and a plurality of second component units. The first component units include a first metal material, and the second component units are composed of a second isolation material and a second metal material. The plurality of first component units are arranged in a predetermined shape; the plurality of second component units are arranged at an outer edge of the predetermined shape, and the second metal material of the plurality of second component units is not connected with the first metal material of the first component units. The plurality of first component units constitute a radiating body of an antenna of the electronic device which may have an arbitrary shape, so freedom to set the antenna is raised.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: December 11, 2018
    Assignees: BEIJING LENOVO SOFTWARE LTD, LENOVO (BEIJING) CO., LTD.
    Inventors: Hua Zhang, Aiguo Zhang, Zhishan Ye
  • Patent number: 10141977
    Abstract: Methods and devices are provided wherein a signal sent on a special operation channel is modified by an identification of a line.
    Type: Grant
    Filed: May 13, 2014
    Date of Patent: November 27, 2018
    Assignee: Lantiq Deutschland GmbH
    Inventors: Vladimir Oksman, Rainer Strobel
  • 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: 10129059
    Abstract: A multi-amplitude modulation receiver includes a signal coupler block coupled to a mixer array block receiving a first input signal from the signal coupler block and a second input from a LO circuit that provides N overlapping phase signals. Outputs of the N mixer elements are coupled to a baseband filter (BBF) block then to a decision threshold block including decision threshold elements including a signal input and at least one comparator receiving at least one VTH value. A phase ordering and mapper block selects M out of the N phases. A digital logic and control block is coupled to control a filter gain and corner frequency of the BBF block and control the VTH value for the decision threshold block which compares a signal received to the VTH value. Outputs from the decision threshold block are coupled inputs of an M-input decision combiner which provides a single data output.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: November 13, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Sudipto Chakraborty, Vinod Mukundagiri
  • Patent number: 10129027
    Abstract: A Security Alerting System is provided with dynamic buffer size adaptation. An alert message from a Security Alerting System is transmitted by obtaining the alert message from the Security Alerting System; authenticating the alert message using a secret key known by a server; storing the authenticated alert message in a buffer; transmitting the buffer to the server; and detecting a truncation attack based on generating different cryptographic keys for protection of inserted messages and transmitted buffers, wherein the cryptographic keys for protection of inserted messages are generated in a forward-secure manner in a same order that the messages are inserted in the buffer and wherein the cryptographic keys for protection of transmitted buffers are generated in a forward-secure manner in a same order that the buffers are transmitted over a network.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: November 13, 2018
    Assignee: EMC IP Holding Company LLC
    Inventors: Ari Juels, Nikolaos Triandopoulos, Kevin D. Bowers
  • Patent number: 10103903
    Abstract: A method and system for maximizing throughput and minimizing latency in a communication system that supports heterogeneous links is presented. The communication system supports a primary link and an alternate link, and the method and system leverage the alternate link to reduce the overhead transmitted over the primary link, thereby increasing throughput and reducing end-to-end latency. The higher latency alternate link provides a delayed version of an information signal that corresponds to a portion of the information signal that is transmitted on the primary link. The received samples from the primary and alternate links may be used to equalize subsequent portions of the information signal received over the primary link, and may also be used for synchronization, timing recovery, DC offset removal, I/Q imbalance compensation, and frequency-offset estimation.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: October 16, 2018
    Assignee: TRELLISWARE TECHNOLOGIES, INC.
    Inventors: Marcus T. Urie, Ryan P. McCourt, Cenk Köse, Keith M. Chugg
  • Patent number: 10098003
    Abstract: An access node, a communication device, methods performed thereby and a computer readable storage medium for carrier hopping are provided. A method of carrier hopping for an access node of a wireless communication network is provided. The access node operates on a first carrier in an unlicensed band. The method comprises: determining whether a hopping triggering condition is satisfied; and in response to determining that the hopping triggering condition is satisfied, activating a carrier hopping procedure to a second different carrier in the unlicensed band.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: October 9, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Gen Li, Jinhua Liu, Zhan Zhang
  • Patent number: 10069575
    Abstract: A node is configured to be connected to a massive multiple-input, multiple-output (MIMO) array to provide spatially multiplexed channels to a plurality of user equipment in an unlicensed frequency band. The node includes a processor configured to allocate a number of degrees of freedom of the massive MIMO array to interference suppression based on an outcome of a first listen-before-talk (LBT) operation performed by the node to acquire the unlicensed frequency band. The processor is also configured to generate a spatial filter based on the number of degrees of freedom allocated to interference suppression. The node also includes a transceiver configured to perform a second LBT operation using the spatial filter.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: September 4, 2018
    Assignee: Alcatel Lucent
    Inventors: Adrian J. Garcia Rodriguez, Giovanni Geraci, David Lopez Perez, Lorenzo Galati Giordano, Andrea Bonfante
  • Patent number: 10057042
    Abstract: The present invention includes: defining a transmission signal generated by the AP and a transmitter (TX) configured to transmit a signal to the AP and reception signals generated by the AP and receivers (RXs) configured to receive a signal from the AP, and canceling self-interference in consideration of a channel gain of the self-interference at the AP; defining a channel transmitted from the TX to the AP as uplink, defining a channel transmitted from the AP to the RX as downlink, and deriving a signal-to-interference-plus-noise ratio (SINR) for a signal transmittable on the uplink and the downlink; selecting an RX capable of maximizing a capacity sum of transmit powers of the AP and the TX; and selecting optimum transmit powers of the AP and the TX for maximizing SINRs of transmission on the uplink and the downlink.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: August 21, 2018
    Assignee: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Hyuk Lim, Wooyeol Choi
  • Patent number: 10054661
    Abstract: An RF fingerprint of the environment of a base station antenna will be regularly monitored, such as by regularly evaluating various RF metrics of uplink reflections of downlink transmission from the antenna. Through regular monitoring of the RF fingerprint, a baseline RF fingerprint could be established. And through continued monitoring of the RF fingerprint, an unexpected change in the RF fingerprint could then be detected, as an indication that the antenna's RF beam direction may have changed. In response to detecting the unexpected change in the antenna's RF fingerprint, the antenna's RF beam direction could then be newly determined, and the antenna's configuration record could be updated to indicate the newly determined RF beam direction.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: August 21, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Deveshkumar N. Rai, Satish Thumar, Jason P. Sigg
  • Patent number: 10028169
    Abstract: The present specification provides a method for receiving data through interference cancellation. The method can comprise the steps of: receiving a transmission signal transmitted by a DMRS-based transmission method; detecting, from the transmission signal, a DMRS-based transmission parameter for an interference cell having caused interference in the transmission signal; estimating an interference channel for the interference cell on the basis of the detected DMRS-based transmission parameter; generating an interference signal for the interference cell on the basis of the estimated interference channel; and cancelling the generated interference signal from the transmission signal so as to restore data transmitted by a serving cell.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: July 17, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Manyoung Jung, Yoonoh Yang, Sangwook Lee, Suhwan Lim, Changhwan Park, Jinyup Hwang
  • Patent number: 10009867
    Abstract: Channel estimator 101, based on the received signal received through a radio channel, estimates an estimated value of a channel showing channel characteristics of the radio channel. Correlation value calculator 103 calculates a time domain channel correlation value showing the time correlation of the radio channel, based on the estimated value of the channel. Channel power calculator 102 calculates channel power as the power of the received signal, based on the estimated value of the channel. Noise power calculator 104 calculates noise power as the power of the noise component contained in the received signal. Corrector 105 corrects the channel power based on the noise power and corrects the time domain channel correlation value based on the corrected channel power and the noise power. Fading Doppler frequency estimator 200 estimates the fading Doppler frequency based on the corrected time domain channel correlation value.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: June 26, 2018
    Assignee: NEC CORPORATION
    Inventors: Ryosuke Uchida, Masayuki Kimata
  • Patent number: 9998174
    Abstract: This disclosure provides systems, methods, and apparatus for wireline communication. A digital subscriber line (DSL) receiver may detect one or more power line communication (PLC) sound packets and measure PLC signal leakage on a set of DSL lines based on the detected sound packets. For example, PLC sound packets may be transmitted by PLC devices within a PLC network, and impulse noise received on the set of DSL lines corresponding to the transmitted PLC sound packet may be detected by a DSL receiver (such as a consumer premises equipment (CPE)). The DSL receiver may measure PLC signal leakage on the set of DSL lines based on the detected PLC sound packets. In some cases, the PLC sound packets may be detected based on a duration, a position, or an arrival time of a PLC sound packet.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: June 12, 2018
    Assignee: Ikanos Communications, Inc.
    Inventors: Laurent Alloin, Hassan Afkhami, Vinay Kumar Chapala
  • Patent number: 9985685
    Abstract: A method comprising allocating one or more detection tones of a sync symbol for crosstalk-free feedback data estimation, wherein the one or more detection tones are a quiet signal; transmitting the one or more detection tones to a computing device, receiving the crosstalk-free feedback data from the computing device, wherein the crosstalk-free feedback data comprises data associated with a background noise detected during the detection tones; determining an optimized PSD based at least in part on the crosstalk-free feedback data; and adjusting a transmission PSD of a plurality of tones based at least in part on the optimized PSD.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: May 29, 2018
    Assignee: Futurewei Technologies, Inc.
    Inventors: Hui Yin, Zhong Pan, Jianping Tu, Haixiang Liang
  • Patent number: 9960867
    Abstract: Apparatus to measure signal-to-thermal noise ratio (SNR) and signal-to-pulse noise ratio (SPNR) includes a pulse noise reduction unit, an SNR estimation unit and an offset compensation unit; a pulse noise separation unit, and an SPNR estimation unit. Pulse noise separation unit includes (i) a first low pass filter (LPF), an impulse noise separator and a high pass filter (HPF), connected in series; and (ii) a second LPF, a pulse noise detection unit and an inverter. Pulse noise detection unit includes two channels, each with a high pass filter, an absolute value calculation unit, a low pass filter, a comparator, a pulse generator. The channels connect to OR gate, which outputs a pulse detection signal. Pulse noise reduction unit and pulse noise separation unit input in-phase and quadrature components. The SPNR estimation unit inputs a filtered in-phase component. The offset compensation unit outputs SNR, and the SPNR estimation unit outputs SPNR.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: May 1, 2018
    Assignee: Topcon Positioning Systems, Inc.
    Inventors: Nikolay Afanasievich Vazhenin, Andrey Vladimirovich Veitsel, Vladimir Victorovich Veitsel, Fedor Borisovich Serkin
  • Patent number: 9934561
    Abstract: A system, method, and computer program product are provided for exchanging images. In use, one or more images are received at a server. Additionally, the one or more images are analyzed. Further, image processing code is outputted referencing the one or more images, based on the analysis of the one or more images. Additional systems, methods, and computer program products are also presented.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: April 3, 2018
    Assignee: Duelight LLC
    Inventors: Adam Feder, Brian Kindle, William Rivard
  • Patent number: 9935770
    Abstract: A Security Alerting System is provided with dynamic buffer size adaptation. An alert message from a Security Alerting System indicating a potential compromise of a protected resource is transmitted by obtaining the alert message from the Security Alerting System; authenticating the alert message using a secret key known by a server, wherein the secret key evolves in a forward-secure manner; storing the authenticated alert message in a buffer, wherein a size of the buffer is based on a connection history of the Security Alerting System; and transmitting the buffer to the server. The alert message can optionally be encrypted. The buffer can be increased in proportion to a duration of a disruption of a connection. The size of the buffer can be increased by adding buffer slots at a location of a current write pointer index. Techniques are also disclosed for detecting truncation attacks and alert message gaps. The alert messages can have a variable size by writing alert message into consecutive buffer slots.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: April 3, 2018
    Assignee: EMC Corporation
    Inventors: Ari Juels, Nikolaos Triandopoulos, Kevin D. Bowers
  • Patent number: 9918317
    Abstract: A central node may include a processor configured to empirically compute an approximation of power coefficients based on estimates of the channel coefficients such that a same one of the approximation of the power coefficient is assigned to each of a plurality of access terminals (ATs), and transmit components of a signal vector to associated access points (APs), the signal vector being based on at least the approximation of the power coefficient.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: March 13, 2018
    Assignee: Alcatel-Lucent USA Inc.
    Inventors: Elina Nayebi, Alexei Ashikhmin, Thomas Louis Marzetta, Hong Yang
  • Patent number: 9912400
    Abstract: A computer defined radio includes a Mobile User Objective System (MUOS) terminal configured to instantiate two or more virtual terminals. Each of the two or more virtual terminals provides all of the functionality of a MUOS terminal with satellite communication through a single antenna. Each of the two or more virtual terminals may join a separate group as defined by MUOS specifications, and give the single MUOS terminal access to the disparate groups. Each of the two or more virtual terminals is configured to operate at a different bitrate such that the total power consumption of the MUOS terminal is less than the same number of physical terminals operating separately.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: March 6, 2018
    Assignee: Rockwell Collins, Inc.
    Inventors: Matthew J. Poduska, Ryan J. Coppa, James A. Stevens, Sarah A. Miller
  • Patent number: 9900893
    Abstract: Receivers in a mobile device are configured to mitigate receiver overload and fully or nearly-fully utilize available spectrum for communication. Configuration is dictated at least in part by at least one of radio link quality or available receiver specifications, and it can be affected by the mobile device or a base station that serves the mobile device. Receiver configuration includes various spectrally asymmetric receivers that tune respective disparate portions of the available spectrum to maximize utilization thereof in the spectral regions prone to overload conditions. In severe overload conditions, a single receiver can be configured to operate in a frequency band spectrally adjacent to a sub-band that leads to overload conditions when employed for telecommunication. To improve performance, the single receiver configuration can be supplemented with at least one of transmit diversity operation, asymmetric multicarrier spreading, or downlink power boost of asymmetrical multicarrier spreading.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: February 20, 2018
    Assignee: AT&T MOBILITY II LLC
    Inventor: Arthur Richard Brisebois
  • Patent number: 9894614
    Abstract: In some embodiments, an apparatus is configured to wirelessly communicate with a base station in a real-time internet protocol (IP) session using a first retransmission parameter in a first frame transmission scheme. In some embodiments, the apparatus is configured to determine a current performance metric and, based on the current performance metric, use a second, different retransmission parameter in a second frame transmission scheme for communications via the real-time IP session. In some embodiments, the retransmission parameter is a number of retransmissions or a number of hybrid automatic repeat request (HARQ) processes.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: February 13, 2018
    Assignee: Apple Inc.
    Inventors: Li Su, Jianxiong Shi
  • Patent number: 9893762
    Abstract: Vector Control Entity and method therein for Disorderly Leaving Events, DLEs, causing Sudden Termination Change in a DSL system. The method comprises, when a DLE occurs on a line m in a vectored group of DSL lines, and the transmission on line m is, at least partly, continued: obtaining at least one error sample from CPEs connected to other lines in the vectored group of DSL lines, and calculating an estimate of the channel coefficients, H?, changed due to the DLE. The estimate is calculated based on the at least one error sample, and thus a channel estimate is provided. The method further comprises modifying a downstream precoder, based on the channel estimate, such that retraining of the other lines in the vectored group due to the DLE is avoided. The estimate of the channel coefficients is calculated based on the model H?=H+C?H.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: February 13, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Eduardo Lins de Medeiros, Per-Erik Eriksson, Yezi Huang, Chenguang Lu, Thomas Magesacher
  • Patent number: 9882744
    Abstract: A device for determining an estimated value for a mean power of the noise-signal sequence, which is superposed on an undisturbed periodic transmitted-signal sequence, determines a mean power of a received-signal sequence, which corresponds to the undisturbed periodic transmitted-signal sequence with the addition of the superposed noise-signal sequence. It then estimates an estimated-signal sequence for the undisturbed periodic transmitted-signal sequence from the received-signal sequence. Following this, a mean power of the estimated-signal sequence and the estimated value of the mean power of the noise-signal sequence is determined from a difference between the determined mean power of the received-signal sequence and the determined mean power of the estimated-signal sequence.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: January 30, 2018
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Thomas Reichel, Kurt Schmidt
  • Patent number: 9876517
    Abstract: A radio frequency (RF) receiver includes a digital tuning engine; and I-path and Q-path analog filters, tuned by the digital tuning engine. The digital tuning engine gets an I/Q imbalance difference, and the digital tuning engines tunes the I-path analog filter and/or the Q-path analog filter based on the I/O imbalance difference.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: January 23, 2018
    Assignee: MEDIATEK INC.
    Inventors: Sheng-Hong Yan, Sheng-Hao Chen, Paul Cheng Po Liang, Jen-Che Tsai
  • Patent number: 9819404
    Abstract: Embodiments of the invention provide a decoder for decoding a signal represented by a vector of information symbols received through a transmission channel in a communication system, said the transmission system being represented by a channel state matrix, said information symbols being selected from a given set of values carrying a set of information bits, wherein said decoder comprises: a division unit (202) configured to divide the channel state matrix into a number of sub-blocks of column vectors, in accordance with a division of said vector of information symbols into a number of sub-vectors; a permutation unit (203) configured to determine a set of permuted channel state matrices by permuting said sub-blocks of column vectors, the permutation unit (203) being further configured to select at least one permuted channel state matrix among said set of permuted channel state matrices according to a selection criterion; a sub-block decoding unit (207) configured to determine a transformed signal from said
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: November 14, 2017
    Assignee: INSTITUT MINES-TELECOM
    Inventors: Mohamed-Achraf Khsiba, Ghaya Rekaya Ben-Othman, Asma Mejri
  • Patent number: 9755709
    Abstract: A method and an apparatus for measuring channel quality in a MIMO system is provided. The method includes measuring a first SINR based on an assumption that a first detector is used, using a channel estimation value of a reception signal with respect to each of a plurality of space layers, and a second SINR for each of the plurality of space layers corresponding to a case where the plurality of space layers exist independently using the channel estimation value of the reception signal; determining a Log Likelihood Ratio of reception data based on an assumption that a second detector is used, with respect to each of the plurality of space layers; and generating channel quality information based on an assumption that the second detector is used, based on the first SINR and the second SINR with respect to each of the plurality of space layers, and the LLR.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: September 5, 2017
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Dong-Sik Kim, Soo-Bok Yeo
  • Patent number: 9667356
    Abstract: The invention relates to a signal generating device for generating a signal including simulated channel fading characteristics. The signal generating device includes a fading simulating unit, a signal generating unit and a modulating unit. The signal generating unit generates a first number of symbols according to a number of transmitting means for a simulated transmission to a device under test. The fading simulating unit calculates from the first number of symbols a second number of faded symbols, wherein a number of signals to be output corresponds to a number of receiving means of the device under test, based on a set of filter parameters, and provides the calculated second number of faded symbols to the modulating means; and the modulating unit generates modulated signals to be output from the second number of faded symbols.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: May 30, 2017
    Assignee: ROHDE & SCHWARZ GMBH & CO. KG
    Inventor: Stefan Schmidt