Including Pulse Regeneration Or Conversion Patents (Class 375/214)
  • Patent number: 10044531
    Abstract: The embodiments of present disclosure provide a method for estimating a response of a baseband self-interference channel and an apparatus, where the method includes: estimating a response of a baseband self-interference channel to obtain a first estimation response of the baseband self-interference channel; starting to perform first full duplex communication; canceling baseband self-interference in a first baseband received signal according to the first estimation response, where the first baseband received signal is a baseband signal received during the first full duplex communication; determining a first parameter of the baseband self-interference channel; determining an estimation policy of the baseband self-interference channel according to the first parameter; and estimating the response of the baseband self-interference channel according to the estimation policy.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: August 7, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Hong Cheng, Teyan Chen, Sheng Liu
  • Patent number: 9975511
    Abstract: A control device of an electromagnetic actuator for a restraint device, including an evaluation and control unit which generates a control signal which predefines a control sequence having control time periods, in which the actuator is activated, and pause time periods, in which the actuator is deactivated. A protective circuit including a counter is provided, the counter monitoring the control sequence and increments its counter content during the at least one control time period and decrements its counter content during the at least one pause time period, the protective circuit effectuating a deactivation of the actuator when the counter content reaches or exceeds a predefined first threshold value, and allows a reactivation of the actuator when the counter content reaches or falls below a predefined second threshold value after reaching or exceeding the first threshold value, the first counter content being greater than the second counter content.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: May 22, 2018
    Assignee: ROBERT BOSCH GMBH
    Inventors: Ruediger Karner, Hartmut Schumacher
  • Patent number: 9972893
    Abstract: Multi-band antennas include one or more duplexers configured to provide isolation of non-linearities generated along a downlink path of RF signals transmitted from the multi-band antenna from an uplink path of RF signals received by the multi-band antenna.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: May 15, 2018
    Assignee: CommScope Technologies LLC
    Inventors: Sammit Patel, Morgan C. Kurk, XiaoHua Hou, Giuseppe Resnati
  • Patent number: 9882628
    Abstract: A technique for self-interference suppression control for a relay node is provided. The relay node comprises a transmitter and a receiver, and is adapted to transmit and received simultaneously using the same frequency channel or using proximate frequency channels. The relay node further comprises an interference signal estimator having a first input adapted to receive a transmitter signal from the transmitter, a second input adapted to receive adaptation metric and an output adapted to output an estimated interference signal generated by the interference signal estimator based on the transmitter signal and the adaptation metric. A subtractor is coupled to the output of interference signal estimator and configured to subtract the estimated interference signal from a received signal in the receiver so as to actively cancel a signal transmitted from the relay node that leaks back into the receiver of the relay node to suppress self-interference.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: January 30, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Lars Sundstrom, Leif Wilhelmsson
  • Patent number: 9838230
    Abstract: The invention refers to faster than Nyquist communication system wherein a set of symbols is conveyed from a transmitter (21) to a receiver (23), wherein the transmitter (21) and the receiver (23) are coupled by means of a transmission channel (22), comprising a precoder (210) adapted for generating a set of precoded symbols from a set of input symbols by performing a matrix operation with a precoding matrix, a pulse filter (212) adapted for generating a transmission signal to be transmitted over the transmission channel (22) as a function of the precoded symbols, a receiving filter (230) adapted for generating a set of sampled symbols as a function of the transmission signal and noise added by the transmission channel, and a decoder (232) adapted for generating a set of decoded symbols as a function of the set of sampled symbols, wherein the elements of the precoding matrix are dependent on a property of the pulse filter (212), The invention further refers to a transmitter, a receiver and corresponding metho
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: December 5, 2017
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Ather Gattami, Emil Ringh
  • Patent number: 9565012
    Abstract: Systems and methods are provided for selecting data from intermediate frequency signals, corresponding to received signals (e.g., satellite signals) carrying modulated data, using digital channelizer switches. An example digital channelizer switch may comprise a plurality of high speed analog-to-digital converters configured to digitize the intermediate frequency signals; a plurality of digital channelizers configured to digitally tune data from the digitized intermediate frequency signals; a multiplexer configured to select one or more digitized intermediate frequency signal generated by the plurality of high speed analog-to-digital converters as inputs to the plurality of digital channelizers; and a high speed digital-to-analog converter configured to generate an analog output signal using digitally tuned data by the digital channelizer, from at least one digitized intermediate frequency signal.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: February 7, 2017
    Assignee: Entropic Communications, LLC
    Inventor: Tommy Yu
  • Patent number: 9531449
    Abstract: A method of controlling interference of relay nodes and node pairs in a multi-hop network, includes relaying signals received from source nodes among the node pairs to destination nodes pairing with the source nodes, and cancelling a part of interference signals between the node pairs by controlling channel coefficients of the relay nodes. The destination nodes are configured to cancel residual interference signals among the interference signals, using the signals received by the destination nodes.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: December 27, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won-Jae Shin, Won Jong Noh, Jong Bu Lim, Kyung Hun Jang
  • Patent number: 9503286
    Abstract: Provided is a method and a terminal for a multi-hop network. The method includes determining whether channel information is necessary to transmit data processed based on a transmission scheme used in the multi-hop network and outputting a result indicative thereof. The method includes configuring channel information based on the transmission scheme, based on the result. The method further includes transmitting the configured channel information and the data processed using the configured channel information.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: November 22, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwang Hoon Han, Kyung Hun Jang
  • Patent number: 9490940
    Abstract: An approach is provided for relaying signals. A signal is received over a communication link and demodulated. Soft symbols are estimated based on probability information corresponding to the demodulated signal. The demodulated signal is remodulated based on the soft symbols. A relay signal is output based on the remodulated signal.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: November 8, 2016
    Assignee: NOKIA TECHNOLOGIES OY
    Inventors: Jorma Lilleberg, Ting Zhou, Fang Wang
  • Patent number: 9287005
    Abstract: Using an “optimized” test case for testing hardware and/or software of a computer. The optimized test case is designed to be run on a data storage device including multiple read locations and multiple write locations. Initialization data is written, on the data storage device, only to the write locations of the data storage device. The optimized test case is run on the data storage device in a manner so that the optimized test case will only write data to each write location after that write location has had initialization data written to that write location. The optimized test case defines read locations and write locations so that, during running of the optimized test case, all read locations which are also write locations will be written by a write instruction of the test case before being read by a read instruction of the test case.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: March 15, 2016
    Assignee: International Business Machines Corporation
    Inventors: Bhavesh D. Budhabhatti, Manoj Dusanapudi, Sairam Kamaraju, Varun Mallikarjunan, Subrat K. Panda
  • Patent number: 9264102
    Abstract: Distortions of both amplitude and phase along a transmission line are compensated for by a trace canceller inserted between a transmitter and a receiver. The trace canceller has an equalizer that compensates for a trace length between the transmitter and the trace canceller. A variable gain amplifier between the equalizer and an output buffer has its gain controlled by an automatic gain control circuit that compares low-frequency swings of the input and output of the trace canceller. The gain of the variable gain amplifier is reduced to prevent the output buffer from saturating and clipping peak voltages on its output. Thus both the variable gain amplifier and the output buffer remain in the linear region. Training pulses from the transmitter are passed through the trace canceller without clipping of peak voltages, allowing the transmitter and receiver to adjust transmission parameters to best match the transmission line.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: February 16, 2016
    Assignee: Pericom Semiconductor Corporation
    Inventors: Hung-Yan Cheung, Michael Y. Zhang
  • Patent number: 9264108
    Abstract: An apparatus and method for communication with a wireless power transmitter are disclosed. According to one aspect, a device may include an antenna for wirelessly transmitting a power signal at a power carrier and data signal at a data signal carrier. A receiver may be configured to receive the power signal and the data signal and determine a reference signal based on the received signal.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: February 16, 2016
    Assignee: QUALCOMM Incorporated
    Inventor: William H. Von Novak, III
  • Patent number: 9258018
    Abstract: In one embodiment, an apparatus includes an upconversion unit configured to upconvert a baseband signal to a radio frequency (RF) signal. A plurality of baluns for a plurality of wireless bands are provided. Multiplexing circuitry is coupled to the plurality of baluns where the upconversion unit is coupled to each balun through the multiplexing circuitry. The multiplexing circuitry is configured to multiplex the radio frequency signal from the upconversion unit to one of the plurality of baluns based on a wireless band being used.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: February 9, 2016
    Assignee: MARVELL WORLD TRADE LTD.
    Inventors: Gregory Uehara, Chao Yang, Ruoxin Jiang, Fernando De Bernardinis, Alessandro Venca, Rinaldo Castello, Marc Leroux, Brian Brunn
  • Patent number: 9252997
    Abstract: High-speed data links between a processor and off-chip DRAM utilizes pulse-amplitude-modulation (PAM) signaling to increase data rate for a given bandwidth and resource budget in SoCs. However, the termination resistor used in the transmission line interface between processor and DRAM consumes large amounts of power during PAM signaling. By adding a biasing source between Ground and the termination resistor, the “floor voltage” that the termination resistor uses as a reference for determining signaling levels may be raised. Raising the floor voltage reduces the amount of voltage across the termination resistor and reduces power consumption accordingly. The biasing source is adjusted to various increments of the maximum amplitude of the PAM signaling. A floor voltage of one-half of the maximum amplitude of PAM signaling produces minimum power consumption in the receiver.
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: February 2, 2016
    Assignee: Qualcomm Incorporated
    Inventors: Lalan Jee Mishra, Timothy Mowry Hollis
  • Patent number: 9158679
    Abstract: A data buffer with a strobe-based primary interface and a strobe-less secondary interface used on a memory module is described. One memory module includes an address buffer, the data buffer and multiple dynamic random-access memory (DRAM) devices. The address buffer provides a timing reference to the data buffer and to the DRAM devices for one or more transactions between the data buffer and the DRAM devices via the strobe-less secondary interface.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: October 13, 2015
    Assignee: RAMBUS INC.
    Inventors: Kambiz Kaviani, Amir Amirkhany, Dinesh Patil, Mohammad Hekmat
  • Patent number: 9148016
    Abstract: A device includes an energy unit coupled to an energy device and adapted to couple a pair of split DC rails. A controller senses the voltage on the DC rails and regulates its output current response by means of an autonomous current response that creates the aggregate effect of controlling the rail voltage in cooperation with other units coupled to the DC rails. A system includes multiple such devices coupled to split DC rails.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: September 29, 2015
    Assignee: Pika Energy Inc.
    Inventors: Joshua Daniel Kaufman, Benjamin Francis Polito, Keith Thomas Richtman
  • Patent number: 9100070
    Abstract: A method and system for mitigating transformer saturation in a communication interface is provided. The method may include detecting a change in impedance resulting from transformer saturation of at least one isolation transformer utilized in a network path of a network. The network may conform to an IEEE 802.3af specification where power may be delivered through the network. The method may further comprise generating a pulse at a one end of the network and measuring a reflection at that end to detect the transformer saturation. In response to the impedance change, a transmitter signal may be pre-distorted in order to compensate for the detected transformer saturation, or the power delivered over the network may be disabled.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: August 4, 2015
    Assignee: Broadco Corporation
    Inventor: Neven Pischl
  • Patent number: 9083413
    Abstract: Method and system for reducing interference between adjacent antennas wherein one antenna transmits a first signal from a transmitter equipment and a second antenna receives a second signal by a receiver equipment, the first and the second signals may have the same frequency, and the angular discrimination between the TX antenna and the RX antenna in the same location is low. The transmitter equipment inputs an intermediate frequency contribution of the first signal into a cross-polar interference canceller, included in the receiver equipment, for reducing a co-channel interference in the receiver equipment caused by the first and the second signals, wherein the cross-polar interference canceller selects a desired signal from the two signals received so as to reduce said interference.
    Type: Grant
    Filed: April 23, 2009
    Date of Patent: July 14, 2015
    Assignee: Alcatel Lucent
    Inventor: Claudio Colombo
  • Patent number: 9025641
    Abstract: The present invention provides, in one embodiment, a method of transmitting a message. The method includes transmitting a first codeword from a transmitter to a relay. The method also includes subsequently transmitting a second codeword based on the first codeword from the relay and a third codeword from the transmitter wherein the second and third codewords are transmitted concurrently.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: May 5, 2015
    Assignee: Alcatel Lucent
    Inventor: Gerhard G. Kramer
  • Patent number: 8995919
    Abstract: In at least one embodiment, a method includes receiving a first transmission from a device, the first transmission transmitted at a first frequency. In response to receiving the first transmission, a transceiver is disabled and a second transmission is transmitted to the device, the second transmission transmitted at a second frequency. The method further includes receiving a third transmission from the device, the third transmission transmitted at the second frequency.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: March 31, 2015
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Randy Zimler, George B. Bolam, James A. Worsham, Jr.
  • Patent number: 8983471
    Abstract: The disclosure relates to a Complex Intermediate Frequency (CIF)-based receiver adapted to process a received signal comprising a signal component at a desired frequency and a signal component as an image frequency. The CIF-based receiver determines the power of the received signal by calibrating the receiver to minimize the power of the signal component at the image frequency that interferes with the signal component at the desired frequency, introduces signal leakage from the image frequency to intentionally degrade the quality of the signal component at the desired frequency, and determines the power of the signal component at the image frequency based on the amount of degradation.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: March 17, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Leif Wilhelmsson, Lars Sundstrom, Fenghao Mu
  • Patent number: 8964817
    Abstract: According to a wireless repeating system of the invention, a first analog signal is digitally converted at a first sampling frequency, a converted original digital signal is oversampled at a second sampling frequency higher than the first sampling frequency, an image digital signal occupying a specific frequency band out of plural image digital signals generated by zero-interpolation is extracted via a digital filter, and the image digital signal is input to a delta-sigma demodulator to convert to a second analog signal and output the second analog signal.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: February 24, 2015
    Assignee: Hitachi Metals, Ltd.
    Inventor: Ken Takei
  • Patent number: 8942273
    Abstract: Provided is a relay node that performs network coding with respect to signals transmitted from a plurality of sources. The relay node may partition a plurality of constellation points into a plurality of subsets, generate a new constellation diagram based on respective characteristics among the plurality of subsets, and perform network coding based on the new constellation diagram.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: January 27, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwang Taik Kim, Vahid Tarokh
  • Patent number: 8917759
    Abstract: A transceiver is described. The transceiver includes a first injection-locked oscillator and a second injection-locked oscillator. The transceiver also includes a first phase-locked loop coupled with the first injection-locked oscillator. The first phase-locked loop is configured to generate a first frequency reference. Further, the transceiver includes a second phase-locked loop coupled the second injection-locked oscillator. The second phase-locked loop is configured to generate a second frequency reference. The transceiver includes a mixer configured to receive the first phase-locked loop output and configured to receive said second injection-locked oscillator output. The mixer is also configured to generate a carrier frequency signal based on the first injection-locked oscillator output and the second injection-locked oscillator output. And, the transceiver includes a modulator configured to receive said carrier frequency signal.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: December 23, 2014
    Assignee: Innophase Inc.
    Inventor: Yang Xu
  • Patent number: 8902885
    Abstract: A communication method between a collecting unit (5) and a plurality of control devices (7i), each of which is associated with at least an electrical device 1(i) via the power line. Messages are exchanged between the collecting unit (5) and the control devices (7i), each of which contains at least: a progressive message number (Pr_N); an addressee identification number assigned to each control device and to the collecting unit. The messages are therefore addressable selectively to a specific control device via said addressee identification number.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: December 2, 2014
    Assignee: Power-One Italy S.p.A.
    Inventor: Aleandro Frezzolini
  • Patent number: 8885503
    Abstract: In a satellite communication system, comprising a hub and a plurality of heterogeneous terminals, the hub may split a bandwidth segment designated for a forward channel into at least two carriers, wherein some of the terminals may listen on a first carrier and some other terminals may listen on the at least second carrier. In this system, the hub may re-arrange the split of the bandwidth segment between the various carriers populating it in real-time or substantially in real-time, while the carriers are actively transmitted, and without causing loss of service and/or loss of data to terminals listening on those carriers. The terminals may be configured to track the carriers as they are re-arranged and to maintain seamless service to the end user throughout the re-arrangement process.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: November 11, 2014
    Assignee: Gilat Satellite Networks Ltd.
    Inventors: Dubi Lever, Avraham Avitzour, Amiram Levinberg
  • Patent number: 8885688
    Abstract: A repeater is configured to selectively generate and transmit control message packets between wireless stations on both a transmit side and a receive side of the repeater. The repeater manages and manipulates an end to end protocol of the control message packets in a manner that does not change media access control (MAC) addresses of the end to end protocol so as to achieve a network objective, such as preventing other transmitters from transmitting while the repeater repeats a signal from its receive side to its transmit side. The control message management is applicable to analog signal repeaters as well as digital repeaters, such as symbol to symbol or packet to packet repeaters, in which physical layer control message management is performed.
    Type: Grant
    Filed: June 7, 2006
    Date of Patent: November 11, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Kenneth M. Gainey, James A. Proctor, Jr., Ross L. Lintelman, Lawrence W. LaMont, Jr., Carlos M. Puig
  • Patent number: 8867590
    Abstract: Disclosed are a control method and a control device for implementing two-way communication in a wireless network. A repeater can measure a channel matrix, which indicates channel information of each of a plurality of nodes based on signals received simultaneously from the plurality of the nodes, and calculate a first basic lattice size, which initializes the lattice sizes of the received signals according to predefined rules. Then, the repeater uses the channel matrix of each of the nodes and the initialized first lattice size to calculate for each of the nodes a first normalization factor, which normalizes the sizes of the signals simultaneously received from each of the nodes, and a minimum normalized factor, which is equivalent to the minimum value of the first normalization factor.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: October 21, 2014
    Assignees: LG Electronics Inc., Inha Industry Partnership Institute
    Inventors: Han Byul Seo, Daeyoung Park, Byoung Hoon Kim
  • Patent number: 8817848
    Abstract: A distributed antenna system includes a master unit including a downlink RF input operable to receive an RF input signal from a downlink port of a base station, a first optical port, and a second optical port. The distributed antenna system also includes a first remote unit coupled to the first optical port. The first remote unit comprises a downlink antenna port and a first uplink antenna port and a second remote unit coupled to the second optical port of the master unit. The second remote unit comprises a downlink antenna port and a second uplink antenna port. The master unit is operable to transmit a first RF signal associated with the first RF uplink signal to a first uplink port of the base station and transmit a second RF signal associated with the second RF uplink signal to a second uplink port of the base station.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: August 26, 2014
    Assignee: Dali Systems Co. Ltd.
    Inventors: Paul Lemson, Shawn Patrick Stapleton, Sasa Trajkovic
  • Publication number: 20140226700
    Abstract: The present disclosure describes apparatuses, methods and systems for high-speed, capacitive wireless data transmission between electronic devices. A transmitting apparatus is coupled to a data stream and comprises a signal preparer and two transmitting terminals. The signal preparer provides a copy of the data stream to a first transmitting terminal and an inverted version to a second transmitting terminal. Each transmitting terminal emanates an electric field representative of the signal it has received from the signal preparer. A receiving apparatus, separated in space from the transmitting apparatus by nonconductive material, comprises two receiving terminals separated in space from each other and a data stream restorer. Each receiving terminal detects the electric field emanated by the corresponding transmitting terminal, such that a received repeated signal is induced on the first receiving terminal and a received inverted signal is induced on the second receiving terminal.
    Type: Application
    Filed: October 10, 2011
    Publication date: August 14, 2014
    Inventor: Rostyslav Volodymyrovych Bosenko
  • Patent number: 8804792
    Abstract: Disclosed are embodiments for an intermediary signal conditioning device with an input adaptable detection mode. In one embodiment, an intermediary signal conditioning device has a control module, an input module, and an output module. The input module and the control module are for receiving an input signal. The control module is configured to interrupt the output module within a duration of time to allow at least a minimum pulse length of the input signal to be output as an output signal from the output module. The intermediary signal conditioning device is configured to condition the input signal for retransmission as the output signal.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: August 12, 2014
    Assignee: Pericom Semiconductor Corporation
    Inventors: Hung-Yan Cheung, Michael Yimin Zhang
  • Patent number: 8804857
    Abstract: A signal processing technology for allowing a repeater to transmit a signal received from an external apparatus to a terminal is provided. In a satellite system, a signal transmitted from a satellite or transmitted to a satellite is subject to a low order modulation, and a terrestrial repeater performs a high order modulation on signals and retransmits the signals.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: August 12, 2014
    Assignees: Electronics and Telecommunications Research Institute, Industrial Cooperation Foundation Chonbuk National University
    Inventors: Hee-Wook Kim, Soo-Young Kim, Bon-Jun Ku, Do-Seob Ahn
  • Patent number: 8787843
    Abstract: A mobile apparatus transmits a message for waking up an apparatus of a communications network in order to achieve access to the communications network. An apparatus of the communications network receives the message, determines whether the apparatus is in a standby mode in which the transmitter is deactivated, and shifts to a wake up mode, in which the transmitter is kept deactivated, for at most an apparatus-specific offset time in response to receipt of the message in case the apparatus is in the standby mode.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: July 22, 2014
    Assignee: Nokia Siemens Networks Oy
    Inventors: Martin Döttling, Jürgen Michel
  • Patent number: 8774253
    Abstract: Disclosed is a wireless relay device wherein the number of stream multiplexes between a wireless transmission device and a wireless reception device can be increased without increasing the number of antennas for the wireless transmission device or the number of antennas for the wireless reception device.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: July 8, 2014
    Assignee: Panasonic Corporation
    Inventors: Kenichi Miyoshi, Daichi Imamura, Yoshiko Saito
  • Publication number: 20140119412
    Abstract: A sampling device for sampling an incoming signal in order to generate an output signal having a different frequency spectrum from the incoming signal. The device comprises a sampler configured to sample the incoming signal at a series of intervals in time, wherein the series of intervals includes a temporally repeating sequence of intervals, and wherein the duration of successive intervals varies throughout the series.
    Type: Application
    Filed: October 22, 2013
    Publication date: May 1, 2014
    Applicant: Thales Holdings UK Plc
    Inventor: Benoit Gorisse
  • Patent number: 8675714
    Abstract: Distortions of both amplitude and phase along a transmission line are compensated for by a trace canceller inserted between a transmitter and a receiver. The trace canceller has an equalizer that compensates for a trace length between the transmitter and the trace canceller. A variable gain amplifier between the equalizer and an output buffer has its gain controlled by an automatic gain control circuit that compares low-frequency swings of the input and output of the trace canceller. The gain of the variable gain amplifier is reduced to prevent the output buffer from saturating and clipping peak voltages on its output. Thus both the variable gain amplifier and the output buffer remain in the linear region. Training pulses from the transmitter are passed through the trace canceller without clipping of peak voltages, allowing the transmitter and receiver to adjust transmission parameters to best match the transmission line.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: March 18, 2014
    Assignee: Pericom Semiconductor Corporation
    Inventors: Hung-Yan Cheung, Michael Y. Zhang
  • Patent number: 8660168
    Abstract: Aspects of a method and system for communicating via a spatial multilink repeater are provided. In this regard, a received signal may be frequency shifted to generate a plurality of repeated signals, wherein each repeated signal may be shifted by a different frequency with respect to the received signal. Each repeated signal may comprise one or more signal components and a phase and/or amplitude of each of the components may be controlled to control a directivity of the repeated signals. Each of the repeated signals may be generated by quadrature down-converting said received signal by mixing the received signal with a first LO signal pair, up-converting the down-converted signal by mixing it with a second LO signal pair, and adding or subtracting an in-phase portion and a quadrature-phase portion of the up-converted signal.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: February 25, 2014
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8630601
    Abstract: An active channelized antenna system includes an antenna array operable over a multi-octave frequency band to provide one or more antenna output signals. An electronics module includes multiplexer circuitry responsive to the one or more antenna output signals configured to divide an input signal spectrum into a plurality of frequency band components each of less than an octave bandwidth. The electronics module includes a plurality of amplifiers each of less than an octave bandwidth to provide an amplified component signal for a respective frequency band. Combiner circuitry included with the electronics module is configured to combine the amplified frequency band components into a composite signal. A transmission medium such as a coaxial cable, fiber optic line or free space, is configured to transmit the composite signal to a remotely located receiver system. The antenna system may be employed as a repeater system.
    Type: Grant
    Filed: April 6, 2009
    Date of Patent: January 14, 2014
    Assignee: Raytheon Company
    Inventors: Charles Chandler, Roger A. Conrad, Robert A. Deaton
  • Patent number: 8619839
    Abstract: An interface module (4) for a unit (1, 2) which is designed to transmit and/or amplify essential communication signals inside an antenna distribution system (29) is specified, said module comprising a first analog interface (6) for forwarding and receiving essential communication signals from mobile terminals (32), a second interface (7) for forwarding and receiving essential communication signals from the antenna distribution system (29), at least one signal path (9, 10) for forwarding the received communication signals between the two interfaces (6, 7), and a controllable digital unit (11) which incorporates the signal path (9, 10) and has means for digitizing incoming communication signals and for subjecting outgoing communication signals to analog conversion. In this case, the digital unit (11) is designed to identify essential communication signals in the digitized communication signals, to mask the remaining signals and to forward the essential communication signals.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: December 31, 2013
    Assignee: Andrew Wireless Systems GmbH
    Inventors: Oliver Braz, Jorg Stefanik, Jaroslav Hoffmann
  • Patent number: 8619837
    Abstract: A repeater environment is provided to deploy a feedback cancellation loop that is adaptively coupled with an antenna array such that a selected metric can be derived by deploying a one or more of selected metrics (e.g., composite metrics) 5 comprising a selected filter bank operative to process the signal on a bin by bin basis and the derived metric can be applied to the antenna array and feedback cancellation loop combination to improve signal integrity and amplification, beam forming operations, and pilot control and overhead channel control operations. In an illustrative implementation, an exemplary repeater environment comprises, a 10 transmitter, a receiver, an equalized feedback cancellation loop circuitry comprising a filter bank, the cancellation loop being operatively coupled to an antenna array. In the illustrative implementation, the feedback cancellation loop can receive signals as input from a cooperating antenna array and provide output signals such as a feedback leakage signal to a cooperating.
    Type: Grant
    Filed: March 3, 2008
    Date of Patent: December 31, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: James A. Proctor, Jr., Kenneth M. Gainey, James C. Otto
  • Publication number: 20130336370
    Abstract: A communication system and method for extending coverage of a base transceiver station. The communication system includes processing circuitry that receives a communication signal over a wireless channel. The received communication signal is processed through an adaptable equalizer to reduce noise, distortion, interference, and frequency errors. In another aspect of the invention, a frequency of a reference signal in the communication system is adjusted to compensate for frequency errors between the communication system and the source of the communication signal. The equalized and frequency adjusted communication signal is then retransmitted into an extended coverage area. Wireless coverage is thereby provided between a base transceiver station and a mobile device in the extended coverage area.
    Type: Application
    Filed: June 19, 2012
    Publication date: December 19, 2013
    Inventors: Milun Jovanovic, Alfons Dussmann, Thomas Kummetz
  • Patent number: 8599906
    Abstract: A repeater environment is provided to operatively deploy a feedback cancellation loop that performs closed loop calculations for weights used by a feedback equalizer to improve signal integrity and amplification. In an illustrative implementation, an exemplary repeater environment comprises a transmitter, a receiver, an equalized feedback cancellation loop circuitry operative to perform one or more closed form calculations for equalizer weights. In the illustrative implementation, the feedback cancellation loop can comprise a calculation module operative to perform one or more closed form weight calculations using linear algebraic techniques as part of feedback signal cancel operations for use by the N tap feedback equalizer canceller.
    Type: Grant
    Filed: March 3, 2008
    Date of Patent: December 3, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: James A. Proctor, Jr., Kenneth M. Gainey, James C. Otto
  • Patent number: 8594158
    Abstract: A base station repeater station pair, comprising: a base station (1) having an input for a broadcast signal (s(t)) and being arranged to transmit, in use, a transfer signal over a link (3) using electromagnetic (EM) radiation; and a repeater station (2) arranged to receive, in use and through EM radiation, the transfer signal from the base station (1) and from the transfer signal broadcast the broadcast signal using EM radiation, in which the link (3) between the base station (1) and the repeater station (2) over which the transfer signal is passed in use comprises a dual polarized link, whereby the base station (1) is arranged to transmit the transfer signal over the link (3) with two different polarizations, and the repeater station (2) is arranged to receive the transfer signal from the link as two differently polarized versions. Also disclosed area base station and a method of using the above.
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: November 26, 2013
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Mikael Coldrey, Martin Nils Johansson, Sven Oscar Petersson
  • Patent number: 8588279
    Abstract: Aspects of a method and system for inter-PCB communication utilizing a spatial multi-link repeater are provided. In this regard, a signal may be transmitted between printed circuit boards via one or more repeaters, wherein the repeaters may frequency shift received signals to generate repeated signals. Each of the repeated signals may be generated by quadrature down-converting said received signal by mixing the received signal with a first LO signal pair, up-converting the down-converted signal by mixing it with a second LO signal pair, and adding or subtracting an in-phase portion and a quadrature-phase portion of the up-converted signal. Each repeated signal may comprise one or more signal components and a phase and/or amplitude of each of the components may be controlled to control a directivity of the repeated signals. The repeater may reside on one of the plurality of printed circuit boards.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: November 19, 2013
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8514913
    Abstract: Techniques are generally described for estimating a communication channel using wirelessly transmitted and retransmitted signals, each transmitted at a different power ratio. An example wireless communications system may include a base station, a relay station and a wireless device. The base station may include a transmitter configured to transmit a first signal, wherein the first signal includes pilot and data symbols with a first power ratio. The relay station may include a receiver configured to receive the first signal, and a transmitter configured to retransmit the first signal as a second signal, wherein the second signal includes pilot and data symbols with a second power ratio. The wireless device includes a receiver configured to receive the first and second signals, i.e. the transmitted and retransmitted pilot and data symbols having the first and second power ratios are received, and estimate a communications channel from the received signals.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: August 20, 2013
    Assignee: The Board of Regents of the University of Texas System
    Inventors: Robert W. Heath, Jr., Ali Yazdan Panah
  • Patent number: 8509136
    Abstract: A base station BS transmits downlink data to a relay station RS. A mobile station MS transmits uplink data to the relay station RS. The relay station RS determines a first modulation scheme for transmitting the uplink data to the base station BS, and determines a second modulation scheme for transmitting the downlink data to the mobile station MS. The relay station RS multiplies a symbol sequence obtained by the first modulation scheme by a symbol sequence obtained by the second modulation scheme for each symbol, and multicasts the multiplication result to the base station BS and the mobile station MS.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: August 13, 2013
    Assignee: Fujitsu Limited
    Inventors: Jianming Wu, Yoshinori Tanaka, Kazuhisa Obuchi, Mitsuhiro Azuma, Tomohiko Taniguchi
  • Patent number: 8488653
    Abstract: A cooperative communication system and method is provided. A cooperative communication relay station includes a signal receiving unit which receives a source signal from a source node and a multiple relaying signal relayed by a neighboring relay station, a signal generation unit which generates a first relay signal and a second relay signal, the first relay signal being generated by performing a decode-and forward scheme with respect to the multiple relaying signal and the second relay signal being generated by performing an amplify-and-forward scheme with respect to the source signal, and a signal transmission unit which transmits the first relay signal and the second relay signal to a destination node.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: July 16, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Tetsuhiko Miyatani
  • Publication number: 20130114651
    Abstract: An apparatus for repeating signals includes a receive antenna for receiving input signals, processing circuitry for processing the input signals to form repeated signals, and a transmit antenna for transmitting the repeated signals. The processing circuitry includes an adaptive digital filter configured to generate cancellation signals that are added to the input signals to cancel unwanted feedback signals from the input signals. A frequency shifting circuit adds a frequency shift to the input signals, after the addition of the cancellation signals, to form repeated signals that are frequency shifted from the input signals. A digital signal processor is coupled to the adaptive digital filter for digitally adapting the filter. The digital signal processor utilizes the frequency shift of the transmission signals to adapt the adaptive digital filter.
    Type: Application
    Filed: December 22, 2012
    Publication date: May 9, 2013
    Applicant: ANDREW LLC
    Inventor: Andrew LLC
  • Publication number: 20130070813
    Abstract: Provided is a relay node that performs network coding with respect to signals transmitted from a plurality of sources. The relay node may partition a plurality of constellation points into a plurality of subsets, generate a new constellation diagram based on respective characteristics among the plurality of subsets, and perform network coding based on the new constellation diagram.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 21, 2013
    Inventors: Kwang Taik KIM, Vahid TAROKH
  • Publication number: 20130010841
    Abstract: Disclosed are a control method and a control device for implementing two-way communication in a wireless network. A repeater can measure a channel matrix, which indicates channel information of each of a plurality of nodes based on signals received simultaneously from the plurality of the nodes, and calculate a first basic lattice size, which initializes the lattice sizes of the received signals according to predefined rules. Then, the repeater uses the channel matrix of each of the nodes and the initialized first lattice size to calculate for each of the nodes a first normalization factor, which normalizes the sizes of the signals simultaneously received from each of the nodes, and a minimum normalized factor, which is equivalent to the minimum value of the first normalization factor.
    Type: Application
    Filed: March 10, 2011
    Publication date: January 10, 2013
    Applicants: INHA INDUSTRY PARTNERSHIP INSTITUTE, LG ELECTRONICS INC.
    Inventors: Han Byul Seo, Daeyoung Park, Byoung Hoon Kim