Noise Or Interference Elimination Patents (Class 455/114.2)
  • Patent number: 10863395
    Abstract: Systems and methods for cell ID disambiguation are described. In one embodiment, a method may be disclosed for constructing a neighbor table, comprising: receiving, at a mobile base station, a physical cell identifier (PCI) of a detected neighbor base station from a user equipment (UE); receiving a global positioning system (GPS) position of the mobile base station; and associating the GPS position of the mobile base station with the PCI of the detected neighbor base station in a neighbor table.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: December 8, 2020
    Assignee: Parallel Wireless, Inc.
    Inventors: Sridhar Donepudi, Rajesh Kumar Mishra, Kaitki Agarwal, Yang Cao, Zeev Lubenski, Murali Talluri
  • Patent number: 10856327
    Abstract: A wireless device receives one or more downlink control information (DCI) comprising transmission parameters for a plurality of signals and one or more power control commands. The wireless device calculates a transmission power of each of the plurality of signals employing the one or more power control commands. The wireless device calculates an energy detection threshold based, at least in part, on the transmission power of the plurality of signals. The wireless device performs a listen before talk (LBT) procedure employing the energy detection threshold.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: December 1, 2020
    Assignee: Ofinno, LLC
    Inventors: Alireza Babaei, Esmael Hejazi Dinan
  • Patent number: 10804975
    Abstract: A method for a transmitter of a mobile communication system transmitting and receiving signals according to an embodiment of the present specification comprises the steps of: transmitting to a receiver system information for transmitting a signal to the receiver including a connection between a wireless resource and a transmitting antenna; transmitting a reference signal to the receiver based on the system information; and receiving from the receiver feedback information generated based on the reference signal. According to an embodiment of the present specification, in a beamforming transmission method of a mobile communication system, a transmitter can determine whether to perform digital pre-coding without advance information from a receiver and can consequently perform a transmission, and can thereby perform lower-overhead and efficient signal transmission/reception.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: October 13, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Taeyoung Kim, Jiyun Seol, Chanhong Kim, Jaeyoel Kim, Hyunjung Kim, Inhak Na, Jiyeon Han
  • Patent number: 10741194
    Abstract: This invention provides a signal processing apparatus for changing an input sound into an easy-to-hear sound. The signal processing apparatus includes a transformer that transforms an input signal into an amplitude component signal in a frequency domain, a stationary component estimator that estimates a stationary component signal having a frequency spectrum with a stationary characteristic based on the amplitude component signal in the frequency domain, a replacement unit that generates a new amplitude component signal using the amplitude component signal obtained by the transformer and the stationary component signal, and replaces the amplitude component signal by the new amplitude component signal, and an inverse transformer that inversely transforms the new amplitude component signal into an enhanced signal.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: August 11, 2020
    Assignee: NEC CORPORATION
    Inventors: Masanori Kato, Akihiko Sugiyama
  • Patent number: 10715113
    Abstract: An attenuator having an impedance that is controllable by a first setpoint signal is coupled to a transmission line. A matching circuit having an impedance that is controllable by a second setpoint signal is also coupled to the transmission line. A transformer circuit block also coupled to the transmission line has a complex impedance. A control circuit sets the first and second setpoint signals so as to control a conjugate impedance relationship between the variable impedances presented by the attenuator and matching circuit relative to the complex impedance of the transformer circuit.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: July 14, 2020
    Assignee: STMicroelectronics SA
    Inventors: Bruno Grelaud, Sebastien Pruvost
  • Patent number: 10644752
    Abstract: In accordance with one or more embodiments, a transmission device includes a receiver configured to receive an interfering signal via an antenna. A controller is configured to select a subset of a plurality of guided electromagnetic wave resource blocks, based on the interfering signal, to mitigate an interference with a distributed antenna system. A transmitter is configured to generate electromagnetic signals conveying data, in accordance with the subset of the plurality of guided electromagnetic wave resource blocks. A coupler is configured to generate guided electromagnetic waves in response to the electromagnetic signals, wherein the guided electromagnetic waves propagate, without requiring an electrical return path, along a surface of a transmission medium of a distributed antenna system.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: May 5, 2020
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Paul Shala Henry, Giovanni Vannucci, Thomas M. Willis, III
  • Patent number: 10645743
    Abstract: Provided is a terminal apparatus including a first wireless communication interface that performs wireless communication with an electronic apparatus using a first wireless communication scheme, a second wireless communication unit that performs wireless communication with the electronic apparatus using a second wireless communication scheme, and a processor. The processor performs processing that displays on a display a display image that is based on information on the degree of radio wave interference in communication with the electronic apparatus in compliance with the first wireless communication scheme and information on a distance to the electronic apparatus, which is obtained based on a beacon signal that is received using the second wireless communication scheme.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: May 5, 2020
    Assignee: Seiko Epson Corporation
    Inventor: Iwane Ikeda
  • Patent number: 10630362
    Abstract: A method and an apparatus for implementing channel measurement are disclosed in the present invention. The method includes: determining an antenna port subset, which is required to be measured, for a UE according to current state information of the user equipment UE; and informing the UE to perform channel measurement for the subset of antenna ports that is required to be measured and feed back channel state information. Through the present invention, when the state information of the UE meets a certain condition, the UE measures only the reference signals of a part of antenna ports, and feeds back channel state information for this part of antenna ports. Therefore, the overhead generated by the feedback of the UE to the channel state information is reduced.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: April 21, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yajun Zhao, Jianguo Wang, Xingqing Cheng, Zuomin Wu, Yan Cheng
  • Patent number: 10602367
    Abstract: A wireless communication apparatus is provided that is capable of performing setting of a wireless LAN access point so that frequency utilization efficiency of an entire wireless communication system that includes wireless LAN access points of different manufacturers and different model numbers is improved.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: March 24, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hirantha Sithira Abeysekera, Koichi Ishihara, Yasuhiko Inoue, Yusuke Asai, Yasushi Takatori, Takeo Ichikawa, Masato Mizoguchi, Munehiro Matsui
  • Patent number: 10567077
    Abstract: Provided is an imbalance compensation device that compensates for an imbalance between an in-phase component and a quadrature-phase component of a signal, the imbalance compensation device including: an extracting unit that extracts a signal component in an upper sideband or a signal component in a lower sideband from the signal; a measuring unit that measures power of the signal component in the upper sideband or the signal component in the lower sideband extracted by the extracting unit; and an adjusting unit that adjusts a parameter related to the imbalance, in accordance with the power measured by the measuring unit.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: February 18, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Tomofumi Oyama, Takeshi Hoshida, Yoshitaka Nomura, Hisao Nakashima
  • Patent number: 10506638
    Abstract: A Random Access (RA) method is provided, comprising receiving, by a base station, a resource request transmitted by at least one of a plurality of terminal devices during one RA time slot, with the resource request including one or more preambles; detecting, by the base station, a priority level of the resource request based on a number of preambles in the resource request; and assigning, by the base station, uplink resources according to the resource request and the priority level.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: December 10, 2019
    Assignee: HUAWEI TECHNOLOGIES DUESSELDORF GMBH
    Inventors: Chan Zhou, Oemer Bulakci, Josef Eichinger
  • Patent number: 10506456
    Abstract: Methods and apparatus are disclosed for communicating in a multi-band cluster. A multi-band member access point (MMAP) may be capable of communicating with a multi-band control access point (MCAP) using a first frequency band, and capable of communicating with associated stations (STAs) using a second frequency band. The MMAP may transmit data in the second frequency band to the associated STA, may transmit a request for interference information in the second frequency band to at least one associated STA, may receive an interference report in the second frequency band from the at least one associated STA, may transmit information in the first frequency band to the MCAP, wherein the information is based on the interference report received from the at least one associated STA in the second frequency band, and may receive, from the MCAP in the first frequency band, information regarding radio resource management of the second frequency band.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: December 10, 2019
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Hanqing Lou, Oghenekome Oteri, Monisha Ghosh, Pengfei Xia, Robert L. Olesen
  • Patent number: 10496549
    Abstract: A memory management method and a storage controller using the same are provided. The memory management method includes: establishing an array; selecting a first block from spare blocks at an initial time point and storing a first index number of the first block to a look-ahead block; adding the first index number in the look-ahead block to the array at a first time point, selecting a second block from the spare blocks and replacing the first index number stored to the look-ahead block with a second index number of the second block, and programming the first block; and adding the second index number in the look-ahead block to the array at a second time point, selecting a third block from the spare blocks and replacing the second index number in the look-ahead block with a third index number of the third block, and programming the second block.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: December 3, 2019
    Assignee: Shenzhen EpoStar Electronics Limited CO.
    Inventors: Shih-Tien Liao, Yu-Hua Hsiao
  • Patent number: 10419077
    Abstract: The present disclosure describes techniques and systems for wireless communication via a mobile relay. These techniques may include a user device that determines that a transceiver is unavailable for communicating with a base station via a wireless connection. The user device then uses a mobile relay to communicate with the base station while the transceiver is unavailable. The mobile relay may be used for transmitting or receiving data from the base station. Additionally or alternatively, the mobile relay may participate in the wireless connection as an external resource of the mobile device or may establish an independent wireless connection with the base station.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: September 17, 2019
    Assignee: Google LLC
    Inventors: Jibing Wang, Erik Richard Stauffer, Aamir Akram
  • Patent number: 10374652
    Abstract: Aspects disclosed in the detailed description include antenna switching for a communication circuit. A communication circuit includes an antenna switching circuit that couples the communication circuit to a first antenna and/or a second antenna for radio frequency (RF) signal transmission and reception. The antenna switching circuit is configured to include fewer antenna switches compared to a conventional antenna switching circuit to reduce the cost and footprint of the communication circuit. Furthermore, by reducing the number of antenna switches in the antenna switching circuit, it is possible to improve RF isolation between the first antenna and the second antenna, thus leading to improved RF performance of the communication circuit.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: August 6, 2019
    Assignee: Qorvo US, Inc.
    Inventor: Nadim Khlat
  • Patent number: 10355745
    Abstract: In accordance with one or more embodiments, a transmission device includes a receiver configured to receive an interfering signal via an antenna. A controller is configured to select a subset of a plurality of guided electromagnetic wave resource blocks, based on the interfering signal, to mitigate an interference with a distributed antenna system. A transmitter is configured to generate electromagnetic signals conveying data, in accordance with the subset of the plurality of guided electromagnetic wave resource blocks. A coupler is configured to generate guided electromagnetic waves in response to the electromagnetic signals, wherein the guided electromagnetic waves propagate, without requiring an electrical return path, along a surface of a transmission medium of a distributed antenna system.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: July 16, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Paul Shala Henry, Giovanni Vannucci, Thomas M. Willis, III
  • Patent number: 10298068
    Abstract: The present disclosure is to provide a power wireless transmitter in a magnetic resonance-based wireless power transmission system, wherein when, due to a presence of a metal, an output from the wireless power transmitter has a change in a resonance frequency thereof, a drive frequency and/or duty ratio with a maximum output therefrom are determined to be applied for a transmission from the wireless power transmitter, thereby to achieve an efficient wireless power transmission.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: May 21, 2019
    Assignee: POWER REPUBLIC CORP.
    Inventors: Yeonmi Oh, Changuk Choi
  • Patent number: 10299223
    Abstract: A method is provided in one example embodiment and may include negotiating power domain interference coordination (PDIC) parameters between a macro cell radio and at least one small cell radio; determining successive interference cancellation (SIC) parameters for each of one or more user equipment (UE) that are to perform SIC for one or more transmissions; and sending the SIC parameters to each of the one or more user equipment. Negotiating PDIC parameters can include determining, by the macro cell radio and at least one small cell radio, one or more physical resource blocks (PRBs) for which transmission power levels can be coordinated for a plurality of frequencies in a frequency domain and a plurality of subframes in a time domain and exchanging PDIC parameters between the cell radios in order to perform PDIC transmissions for UE served by the cell radios.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: May 21, 2019
    Assignee: Cisco Technology, Inc.
    Inventor: Vivek Jha
  • Patent number: 10257733
    Abstract: A method and apparatus configures a wireless network comprising a plurality of nodes to mitigate effects of an external interference source. A subset of the nodes simultaneously participate in an external interference sampling process in which each node of the subset samples signals received by an antenna array of that node. A measurement report, comprising a signal source angle and a received signal strength, is received from a node. A location of the external interference source is estimated using the measurement report. The external interference source is then characterized using the estimated location of the external interference source and the received signal strength to calculate for the external interference source at least one of: a source power; a beam width; an antenna bearing; and a front-to-back transmission ratio. The nodes are configured to mitigate effects of the external interference source in dependence on a result of the characterizing step.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: April 9, 2019
    Assignee: AIRSPAN NETWORKS INC.
    Inventors: Martin Lysejko, Andrew Logothetis
  • Patent number: 10200993
    Abstract: Techniques are described for wireless communication at a wireless communication device. One method includes determining an availability of a sub-band of a shared radio frequency spectrum band during a first portion of a distributed channel availability check (CAC); receiving at least one indication that the sub-band is available during remaining portions of the distributed CAC; and communicating over the sub-band based at least in part on determining the sub-band is available during the first portion of the distributed CAC and the at least one indication that the sub-band is available during remaining portions of the distributed CAC.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: February 5, 2019
    Assignee: QUALCOMM Incorporated
    Inventor: Michael Richard Green
  • Patent number: 10187091
    Abstract: An electronic device is provided. The electronic device includes a first communication circuit configured to perform wireless communication with an external electronic device, based on a first communication protocol in which the wireless communication is possible based on at least one of a first frequency or a second frequency, a processor electrically connected to the communication circuit, and a memory electrically connected to the processor. The memory is configured to store instructions, the instructions, when executed, causing the processor to acquire information associated with at least one of a state or an operation of the electronic device and the first communication to perform the wireless communication selectively based on one of the first frequency or the second frequency, based on at least a part of the acquired information.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: January 22, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hee Tae Kim, Bong Su Chun
  • Patent number: 10136341
    Abstract: A computer implemented method includes transmitting a transmit command to a first data concentrator to send out a predetermined signal of predetermined characteristics according to a transmission setting, receiving a received signal from at least one second data concentrator, and determining if there are any signal transmission effects between the first data concentrator and the second data concentrator based on a comparison of the predetermined signal and the received signal.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: November 20, 2018
    Assignee: Simmonds Precision Products, Inc.
    Inventors: Christopher Fitzhugh, Michael A. Lynch
  • Patent number: 10079703
    Abstract: Various embodiments associated with use of an echo signal are described. A plurality of sensors can be deployed to obtain editions of a signal of interest. The signal of interest may be so far away from the sensors that the editions collected are too noisy to be analyzed. A processing center can send an echo signal to the sensors and the sensors can respond to the processing center with a signal edition of the signal of interest and the echo signal. Since the processing center knows information about the echo signal, offsets among the sensors can be calculated based on the returned echo signals. These offsets can then be used to align the signal editions. At the processing center, the aligned signal editions can be combined into a combined signal and a demodulation scheme for the combined signal can be determined and then used for demodulation of the signal.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: September 18, 2018
    Assignee: The United States of America, as represented by the Secretary of the Army
    Inventor: Wei Su
  • Patent number: 9992315
    Abstract: Disclosed are a terminal and a terminal multiple protection method. The radiation processing module is configured to convert after preprocessing a first signal received from the external into a second signal that can be recognized by a baseband chip of a terminal. A radiation diagnosis module is configured to extract signal characteristics expressed by the second signal, to classify signals via comparison of signal characteristics, to diagnose to acquire a signal type to which the second signal pertains, and to output the second signal to a radiation protection control module for executing a relevant protection process for the corresponding signal type. The radiation protection module is configured to acquire the second signal and the corresponding signal type thereof and to selectively execute a relevant protection control process among multiple protection processes on the basis of the corresponding signal type.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: June 5, 2018
    Assignee: ZTE Corporation
    Inventor: Shaowu Shen
  • Patent number: 9953628
    Abstract: A microphone device including a first sound receiving module and a second sound receiving module is provided. The first sound receiving module includes a first output terminal and receives a sound signal to output a first electronic signal through the first output terminal. The second sound receiving module, which disposed adjacent to the first sound receiving module to receive the sound signal, includes a second output terminal and outputs a second electronic signal through the second output terminal accordingly. The first output terminal of the first sound receiving module is coupled to the second output terminal of the second sound receiving module, and the phase of the first electronic signal and the phase of the second electronic signal are inverse to each other.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: April 24, 2018
    Assignee: Merry EIectronics (Shenzhen) Co., Ltd.
    Inventor: Chia-Chung Lin
  • Patent number: 9954582
    Abstract: A power transmitting apparatus that performs power transmission to a power receiving apparatus includes an amplifier including a switching element, receives a load power amount from the power receiving apparatus, detects a value for evaluating the efficiency of the amplifier, and based on the load power amount and the detected value for evaluating the efficiency, increases or reduces a voltage that is to be supplied to the amplifier.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: April 24, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takahiro Shichino, Tadashi Eguchi
  • Patent number: 9906194
    Abstract: An exemplary system comprises a linearizer module, a first upconverter module, a power amplifier module, a signal sampler module, and a downconverter module. The linearizer module may be configured to receive a first intermediate frequency signal and to adjust the first intermediate frequency signal based on a reference signal and a signal based on a second intermediate frequency signal. The first upconverter module may be configured to receive and up-convert a signal based on the adjusted first intermediate frequency signal to a radio frequency signal. The power amplifier module may be configured to receive and amplify a power of a signal based on the radio frequency signal. The signal sampler module may be configured to sample a signal based on the amplified radio frequency signal. The downconverter module may be configured to receive and down-convert a signal based on the sampled radio frequency signal to the second intermediate frequency signal.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: February 27, 2018
    Assignee: Aviat U.S., Inc.
    Inventors: Frank Matsumoto, Youming Qin, David C. M. Pham, Jayesh Nath, Ying Shen
  • Patent number: 9848342
    Abstract: Methods, apparatuses, and systems that compensate for communication excursions in multipath communication systems (e.g. MIMO communication systems) while satisfying performance requirements parameters of the communication system. A plurality of communication signals may be received in a transmitter. The plurality of communication signals may be precoded (e.g. mixed) into a plurality of precoded communication signals. Excursions in the precoded communication signals may be scaled to generate a plurality of excursion compensated precoded communication signals. The scaling may be based on performance requirements parameters of a communication system and based on parameters of the precoding the plurality of communication signals. The plurality of excursion compensated precoded communication signals may then be amplified by a plurality of amplifiers.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: December 19, 2017
    Assignee: CCIP, LLC
    Inventor: Ronald Duane McCallister
  • Patent number: 9768892
    Abstract: In an embodiment, a method for measuring passive intermodulation (PIM) associated with a device under test (DUT) includes generating a test signal using a measuring instrument and obtaining measurements of PIM for the DUT. The test signal comprises two or more tones each amplified to a target output power by a respective amplifier according to a duty cycle. Measurements are obtained by the measuring instrument during an active portion of each duty cycle over a sweep of frequencies. PIM is calculated for the DUT by averaging a plurality of measurements obtained for each frequency from the sweep of frequencies. The duty cycle is determined based on the target output power.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: September 19, 2017
    Assignee: ANRITSU COMPANY
    Inventor: Donald Anthony Bradley
  • Patent number: 9756422
    Abstract: A mobile device uses externals microphone signals to improve the estimate of background noise that it computes. In order to improve voice quality in a first signal that is produced by an internal microphone, the mobile device identifies an external microphone device within proximity of the mobile device. The mobile device establishes a wireless connection with the external microphone device. The mobile device receives a second signal from the external microphone device through the wireless connection. The second signal is produced by a microphone of the external microphone device. The mobile device generates a noise profile based on the second signal, and then suppresses background/ambient noise from the first signal based on the noise profile. Other embodiments are also described.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: September 5, 2017
    Assignee: APPLE INC.
    Inventors: Baptiste P. Paquier, Bryan J. James, Aram M. Llndahl
  • Patent number: 9743361
    Abstract: A network access method, device, and system. The method includes: detecting, by a mobile wireless interconnection device, whether interference exists between a first channel and a second channel, where the first channel is between the mobile wireless interconnection device and a station, and the second channel is between the mobile wireless interconnection device and a hotspot access device; if interference exists, reducing, by the mobile wireless interconnection device, its own transmit power, so that no interference exists between the first channel and the second channel, and the station accesses the Internet by using the mobile wireless fidelity device and the hotspot access device.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: August 22, 2017
    Assignee: Huawei Device Co., Ltd.
    Inventors: Chao Xiang, Hongfei Tian
  • Patent number: 9692529
    Abstract: A system, method and computer program product for signal emitter identification using Higher-Order Cumulants (HOC) is presented. At least one transient signal is received from an emitter when the emitter turns on. The at least one transient signal is processed using at least one Higher-Order Cumulant (HOC) to provide a set of entries for a vector table. A feature vector is derived from the vector table, the feature vector identifying the emitter. The feature vector is used to identify an emitter.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: June 27, 2017
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Wayne D. Music, Ryan N. Wilson, Brian K. Anderson
  • Patent number: 9596541
    Abstract: A method and system for improving echo suppression and/or duplexity of handsfree telephone applications is presented. An echo suppression unit for an electronic device comprising a loudspeaker and a microphone is described. The microphone is configured to capture a transmit signal, wherein the transmit signal comprises an echo of a receive signal rendered by the loudspeaker. The echo suppression unit is configured to determine, based on the receive signal, whether the receive signal comprises a first frequency component causing the echo of the receive signal to comprise a distortion component. The distortion component comprises one or more frequencies which are not comprised within the first frequency component. Furthermore, the echo suppression unit is configured to apply a post-filter to the transmit signal, if it is determined that the receive signal comprises the first frequency component. The post-filter is configured to selectively attenuate the distortion component.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: March 14, 2017
    Assignee: Dialog Semiconductor B.V.
    Inventors: Michiel Helsloot, Georgios Flamis, Gavin Radolan
  • Patent number: 9543991
    Abstract: Compression of an input signal prior to high power radio frequency (RF) amplification and transmission is disclosed. A compression device can receive an input signal and generate a compressed signal that can be passed to an amplification stage to reduce intermodulation effects. The compression device can further generate compression information that can be transmitted to enable a mobile device receiving an amplified version of the compressed signal and the compression information to decompress the amplified version of the compressed signal. Further, a mobile device that can receive an amplified compressed signal and compression information, such that the mobile device can decompress the amplified compressed signal, is also disclosed. The disclosed subject matter can enable use of lower cost, smaller, and less complex RF amplifiers within a wireless network environment.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: January 10, 2017
    Assignee: AT&T MOBILITY II LLC
    Inventor: Sheldon Kent Meredith
  • Patent number: 9526109
    Abstract: Systems, methods, and software described herein provide enhancements for monitoring communication data for multiple applications on a wireless device. In particular, a wireless access node is configured to monitor signal to noise data for a first frequency band from a second frequency band. When the signal to noise data meets noise criteria, the access point schedules observation periods in the first frequency band to determine intermodulation distortion for the first frequency band from the second frequency band. Based on the intermodulation distortion meeting distortion criteria, the access point schedules the second frequency band to transmit data only when the first frequency band is neither transmitting nor receiving data.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: December 20, 2016
    Assignee: Sprint Communications Company L.P.
    Inventors: Andrew Mark Wurtenberger, Sreekar Marupaduga, Patrick J. Schmidt
  • Patent number: 9510094
    Abstract: A mobile device uses externals microphone signals to improve the estimate of background noise that it computes. In order to improve voice quality in a first signal that is produced by an internal microphone, the mobile device identifies an external microphone device within proximity of the mobile device. The mobile device establishes a wireless connection with the external microphone device. The mobile device receives a second signal from the external microphone device through the wireless connection. The second signal is produced by a microphone of the external microphone device. The mobile device generates a noise profile based on the second signal, and then suppresses background/ambient noise from the first signal based on the noise profile. Other embodiments are also described.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: November 29, 2016
    Assignee: Apple Inc.
    Inventors: Baptiste P. Paquier, Bryan J. James, Aram M. Lindahl
  • Patent number: 9489608
    Abstract: An RFID card includes a smartcard controller that receives power from a host device. The RFID card also includes a small inductive device capable of inductive coupling with an RFID reader. The small inductive device is small enough to fit in the form factor of a memory card or SIM card. Enhancement circuits enhance the usable read and write distance of the RFID card.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: November 8, 2016
    Assignee: Tyfone, Inc.
    Inventors: Siva G. Narendra, Saurav Chakraborty, Prabhakar Tadepalli
  • Patent number: 9483722
    Abstract: An RFID card includes a smartcard controller that receives power from a host device. The RFID card also includes a small inductive device capable of inductive coupling with an RFID reader. The small inductive device is small enough to fit in the form factor of a memory card or SIM card. Enhancement circuits enhance the usable read and write distance of the RFID card.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: November 1, 2016
    Assignee: Tyfone, Inc.
    Inventors: Siva G. Narendra, Saurav Chakraborty, Prabhakar Tadepalli
  • Patent number: 9474033
    Abstract: Adjustment of a downlink transmit power parameter, such as a ceiling level, is disclosed. Signal-to-noise type information and committed power information can be employed to determine the ceiling level adjustment. A ceiling level can be a predetermined cap on transmission power for downlink channels between a user equipment and a base station. Where there is sufficient headroom in total transmission power and a power level greater than the predetermined ceiling can be effective, the ceiling can be adjusted to greater values than the predetermined value. Where total transmission power is more committed, ceiling adjustment can be prevented. Further, where there is no adequate benefit from increasing the ceiling, the adjustment of the ceiling can be prevented. While some instances can result in optimized transmission levels below the ceiling, instances can also be accommodated where the ceiling is to be increased.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: October 18, 2016
    Assignee: AT&T MOBILITY II LLC
    Inventors: Vladimir Gusavac, Manish Vaishnav
  • Patent number: 9461756
    Abstract: A method and apparatus for calibrating a terminal is provided. The apparatus includes a modem; a transmission chain configured to process a signal input from the modem and transmit the processed signal via an antenna; a reception chain configured to process a signal received via the antenna and transmit the processed signal to the modem; and a connector configured to connect an output of the transmission chain and an output of the reception chain via an envelope detector and a switch configured to turn on/off the envelope detector, calibrate a DC offset voltage and I and Q signals of the transmission chain by inputting a one-tone signal of 1 MHz into the transmission channel via the modem in a state where the envelope detector is turned on, and calibrate a second order input intercept point (IIP2) characteristic value by adjusting the signal input into the modem via the reception channel.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: October 4, 2016
    Assignee: Samsung Electronics Co., Ltd
    Inventor: Young-Taek Lee
  • Patent number: 9391590
    Abstract: A filter and method for filtering a signal are disclosed. The filter is equivalent to a plurality of bi-quad filters connected in series, and is implemented on a digital processor that receives a sequence of signal values at a sampling rate characterized by a sampling interval and generates a filtered signal value upon receiving each received signal value. The filter has a latency that is less than the sampling interval. The filtered values can be generated by adding a term to a received signal value and multiplying the sum by a gain constant that depends on the filter constants. The added term does not depend on the current received signal value. The filter can be implemented in fixed-point integer arithmetic.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: July 12, 2016
    Assignee: Keysight Technologies, Inc.
    Inventors: Daniel Y. Abramovitch, Christopher R. Moon
  • Patent number: 9385794
    Abstract: To provide a mobile terminal apparatus, radio base station apparatus and radio communication method that enable accurate precoding weights to be generated in coordinated multipoint transmission, a radio communication method of the invention is characterized in that a mobile terminal apparatus (10) performs channel estimation using a downlink reference signal, selects a PMI using the obtained channel estimation value, measures an IQI using at least the channel estimation value and the PMI, and transmits at least the PMI and IQI to a radio base station apparatus, and that the radio base station apparatus generates precoding weights using the PMI and IQI, and performs coordinated multipoint transmission utilizing MIMO transmission using the precoding weights.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: July 5, 2016
    Assignee: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Satoshi Nagata
  • Patent number: 9369094
    Abstract: An exemplary system comprises a linearizer module, a first upconverter module, a power amplifier module, a signal sampler module, and a downconverter module. The linearizer module may be configured to receive a first intermediate frequency signal and to adjust the first intermediate frequency signal based on a reference signal and a signal based on a second intermediate frequency signal. The first upconverter module may be configured to receive and up-convert a signal based on the adjusted first intermediate frequency signal to a radio frequency signal. The power amplifier module may be configured to receive and amplify a power of a signal based on the radio frequency signal. The signal sampler module may be configured to sample a signal based on the amplified radio frequency signal. The downconverter module may be configured to receive and down-convert a signal based on the sampled radio frequency signal to the second intermediate frequency signal.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: June 14, 2016
    Assignee: Aviat U.S., Inc.
    Inventors: Frank Matsumoto, Youming Qin, David C. M. Pham
  • Patent number: 9319788
    Abstract: A sound processing apparatus (400) is provided with: a directivity synthesis processing unit (410) for generating a first directivity sound pick-up signal by synthesizing a first sound pick-up signal and a relatively delayed second sound pick-up signal and a second directivity sound pick-up signal by synthesizing a relatively delayed first sound pick-up signal and a second sound pick-up signal; a comparison signal calculation unit (440) for generating a non-directivity level signal indicating the level of a sum of the directivity sound pick-up signals and a directivity level signal by adding the levels of the directivity sound pick-up signals; a level comparison unit (451) for acquiring the difference between the levels of the non-directivity level signal and the directivity level signal; and a delay control unit (452) for adjusting the delay amount such that the difference between the levels becomes smaller.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: April 19, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yutaka Banba, Takeo Kanamori
  • Patent number: 9300264
    Abstract: A receiver includes LNA-mixer arrangement, a current buffer arrangement and an analog filter arrangement. The LNA-mixer arrangement receives a plurality of input signals and provides a wide-band input match for a specified frequency range of operation. The LNA-mixer arrangement includes a plurality of LNA structures and a plurality of mixer structures where each of the LNA structure path is coupled to a single mixer structure. The LNA-mixer arrangement outputs a first signal. The current buffer arrangement receives the first signal and reduces the Image Rejection (IR) asymmetry between the high frequency portion and the low frequency portion of the first signal as well as provides a gain to the first signal. The current buffer arrangement outputs a second signal. The analog filter arrangement receives the second signals and perform filtering and calibration.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: March 29, 2016
    Assignee: MEDIATEK INC.
    Inventors: Ravikanth Suravarapu, Saravanan Rajapandian, Narayanan Baskaran, Caiyi Wang, Jing Li
  • Patent number: 9287904
    Abstract: Measures for interference reduction for an envelope branch type transmitter. Such measures may include determination of a target frequency span for reducing interference caused by an envelope branch type transmitter, and configuration of a differential delay between a signal branch and an envelope branch of the envelope branch type transmitter on the basis of the determined target frequency span.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: March 15, 2016
    Assignee: BROADCOM CORPORATION
    Inventor: Markus Nentwig
  • Patent number: 9258819
    Abstract: A femtocell includes a frequency offset detecting module and a frequency correction module. The frequency offset detecting module calculates frequency offset and detects whether the frequency offset exceeds a default frequency offset. The frequency detecting offset module counts the time of the frequency offset exceeding the default frequency offset, and detects whether the counted number of times exceed a first default number. The frequency detecting module re-calculates frequency offset after an internal when the counted number of times does not exceed the first default number. The frequency correction module uses a last calculated frequency offsets to adjust the frequency of the femtocell, when the counted number of times exceed the first default number. A method of adjusting frequency of the femtocell is also provided.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: February 9, 2016
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: Yu-Hung Lin
  • Patent number: 9202747
    Abstract: A radio frequency (RF) module comprises a conductive top layer configured to improve RF interference-shielding functionality with respect to one or more RF devices disposed on the module. The conductive top layer may be segmented as to form one or more segments of the top layer that are at least partially electrically isolated from surrounding segments or devices. A module may have a plurality of devices disposed thereon, wherein separate, at least partially isolated, top conductive layers correspond to different devices of the module. The top layer may be etched or cut to achieve such segmentation.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: December 1, 2015
    Assignee: Skyworks Solutions, Inc.
    Inventors: Howard E. Chen, Matthew Sean Read, Anthony James LoBianco, Hoang Mong Nguyen, Guohao Zhang, Dinhphuoc Vu Hoang
  • Patent number: 9203529
    Abstract: Aspects of the present disclosure relate to determining the location and/or density of vias that form part of an RF isolation structure of a packaged module and the resulting RF isolation structures. From electromagnetic interference (EMI) data, locations of where via density can be increased and/or decreased without significantly degrading the EMI performance of the RF isolation structure can be identified. In certain embodiments, one or more vias can be added and/or removed from a selected area of the packaged module based on the EMI data.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: December 1, 2015
    Assignee: Skyworks Solutions, Inc.
    Inventors: Howard E. Chen, Matthew Sean Read, Hoang Mong Nguyen, Anthony James LoBianco, Guohao Zhang, Dinhphuoc Vu Hoang
  • Patent number: 9202748
    Abstract: A radio frequency (RF) module comprises an electrical reference, or ground, plane to which one or more RF devices disposed on the module are electrically coupled, and may be disposed beneath the RF devices. The reference plane may be segmented as to form one or more segments of the reference plane that are at least partially electrically isolated from surrounding segments or devices. A module may have a plurality of devices disposed thereon, wherein separate, at least partially isolated reference planes, correspond to different devices of the module. The reference plane may be etched or cut to achieve such segmentation.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: December 1, 2015
    Assignee: Skyworks Solutions, Inc.
    Inventors: Anthony James LoBianco, Hoang Mong Nguyen