Loopback Mode Patents (Class 375/221)
  • Patent number: 10515240
    Abstract: An RFID echo cancellation assembly includes: a circulator defining a transmission path from a transmit module to an antenna module, and a reception path from the antenna module to a receive module; a combiner on the reception path between the circulator and the receive module; a variable reflector for applying a cancellation signal to the combiner; a controller for setting an operational parameter at the variable reflector according to an attribute of a transmitted signal from the transmit module; and a coupler defining a segment of the transmission path between the transmit module and the circulator, and a cancellation path between the variable reflector and the combiner. The coupler couples a portion of the transmitted signal to the variable reflector, whereupon the variable reflector generates the cancellation signal based on the operational parameter, for transmission to the combiner via the cancellation signal path.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: December 24, 2019
    Assignee: Zebra Technologies Corporation
    Inventors: Mark W. Duron, Michael J. Koch, Amit Asthana
  • Patent number: 10516439
    Abstract: In one example a controller comprises logic, at least partially including hardware logic, configured to implement a first iteration of an interference test on a communication interconnect comprising a victim lane and a first aggressor lane by generating a first set of pseudo-random patterns on the victim lane and the aggressor lane using a first seed and implement a second iteration of an interference test by advancing the seed on the first aggressor lane. Other examples may be described.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: December 24, 2019
    Assignee: Intel Corporation
    Inventors: Alexey Kostinsky, Tomer Levy, Paul S. Cheses, Danny Naiger, Theodore Z. Schoenborn, Christopher P. Mozak, Nagi Aboulenein, James M. Shehadi
  • Patent number: 10484106
    Abstract: An array of antenna elements are located in relation with a plurality of pre-characterized reference detectors. At baseband frequencies, a transmit radiation pattern of the array of antenna elements is sensed with the plurality of pre-characterized reference detectors, at a plurality of phase and gain settings, to detect mismatch among two or more elements of the array of antenna elements. Phase and gain settings for the array of antenna elements are updated to correct the mismatch.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: November 19, 2019
    Assignee: International Business Machines Corporation
    Inventors: Alberto Valdes Garcia, Bodhisatwa Sadhu, Yahya Mesgarpour Tousi
  • Patent number: 10476576
    Abstract: A method for transmitting feedback configuration information by a terminal configured to perform communication through a channel in a wireless communication system is provided. The method includes configuring channel component information for separating each of a plurality of channel elements of the channel according to components of the plurality of channel elements; configuring grouping information for grouping the plurality of channel elements; configuring order sorting information for sorting an order of the plurality of channel elements; configuring probability distribution approximation information for probability distribution approximating the plurality of channel elements; and transmitting the configured channel component information, grouping information, order sorting information, and probability distribution approximation information.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: November 12, 2019
    Assignees: Samsung Electronics Co., Ltd, Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Hoon-Dong Noh, Sooyong Choi, Youngrok Jang, Young-Woo Kwak, Youn-Sun Kim, Dongheon Lee, Seongbae Han
  • Patent number: 10447335
    Abstract: A front end module having transmit loopback functionality may be operated by conducting a loopback signal from an output of a power amplifier to a receive port on a transmit loopback path and conducting a radio frequency receive signal from an antenna port to the receive port on a receive path. The transmit loopback path includes a first switch coupled between the output of the power amplifier and the receive port. The receive path includes a second switch coupled between the antenna port, where the receive port and is without the first switch.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: October 15, 2019
    Assignee: Skyworks Solutions, Inc.
    Inventors: Joseph Anton Pusl, III, Craig Joseph Christmas
  • Patent number: 10447336
    Abstract: A front end module with transmit loopback functionality has a transmit loopback path that is configured to conduct a loopback signal from an output of a power amplifier to a receive port, and a receive path that is configured to conduct a radio frequency receive signal from an antenna port to the receive port. The transmit loopback path includes a first switch coupled between the output of the power amplifier and the receive port. The receive path includes a second switch coupled between the antenna port and the receive port, where the receive path is without the first switch.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: October 15, 2019
    Assignee: Skyworks Solutions, Inc.
    Inventors: Joseph Anton Pusl, III, Craig Joseph Christmas
  • Patent number: 10411923
    Abstract: A high-speed signaling system with adaptive transmit pre-emphasis. A transmit circuit has a plurality of output drivers to output a first signal onto a signal path. A receive circuit is coupled to receive the first signal via the signal path and configured to generate an indication of whether the first signal exceeds a threshold level. A first threshold control circuit is coupled to receive the indication from the receive circuit and configured to adjust the threshold level according to whether the first signal exceeds the threshold level. A drive strength control circuit is coupled to receive the indication from the receive circuit and configured to adjust a drive strength of at least one output driver of the plurality of output drivers according to whether the first signal exceeds the threshold level.
    Type: Grant
    Filed: June 7, 2017
    Date of Patent: September 10, 2019
    Assignee: Rambus Inc.
    Inventors: Vladimir M. Stojanovic, Andrew C. Ho, Anthony Bessios, Fred F. Chen, Elad Alon, Mark A. Horowitz
  • Patent number: 10390352
    Abstract: Disclosed is a method and apparatus for transmitting channel state information (CSI) by a user equipment in a mobile communication system. The method includes receiving a CSI-reference signal (CSI-RS) for measuring a state of a downlink channel and a CSI feedback-related configuration from a base station (BS); determining a channel quality indication (CQI) for at least one transmission point and control information for determining a CQI for multiple transmission points, based on the received CSI-RS and CSI feedback-related configuration; and transmitting the determined CQI for the at least one transmission point and control information to the BS.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: August 20, 2019
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Youn-Sun Kim, Ki-Il Kim, Ju-Ho Lee, Hyo-Jin Lee, Joon-Young Cho, Seung-Hoon Choi
  • Patent number: 10225021
    Abstract: A high data rate, high sensitivity, low power optical link using low-bandwidth components and low-bandwidth E/O drivers and receivers and method of building same. The method is based on the idea of making the optical part of the link look like a bandwidth limited lossy electrical channel, so that the powerful equalization methods used in the wireline electrical links can be applied to recover the transmitted data in a situation with low bandwidth and/or high loss and strong inter-symbol interference. Linear and non-linear optical channel components, E/O drivers and receivers can benefit from the apparatus and the methods of the invention.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: March 5, 2019
    Assignee: Elenion Technologies, LLC
    Inventors: Alexander Rylyakov, Richard Younce, Ran Ding, Peter D. Magill, Hao Li, Michael J. Hochberg
  • Patent number: 10164761
    Abstract: Methods and systems are provided for using error related feedback during signal processing. During handling of an input signal, each of a plurality of sub-carriers in the input signal is processed, and error-related information for each one of the plurality of sub-carriers is determined based on the processing. Aggregate error-related information is generated based on error-related information of each of one of the plurality of sub-carriers, and subsequent processing of at least one of the sub-carriers is adjusted based on the aggregate error-related information. The error-related information may comprise phase error-related information. Adjustments to subsequent processing of one or more of the sub-carriers may be determined based on processing-related information corresponding to different stages during processing of each of the plurality of sub-carriers.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: December 25, 2018
    Assignee: MAXLINEAR, INC
    Inventors: Curtis Ling, Timothy Gallagher
  • Patent number: 10148417
    Abstract: A method and system for duty-cycled high speed clock and data recovery with forward error correction are provided. The system operates on a first digital signal comprising a first plurality of samples and a second digital signal comprising a second plurality of samples. The second plurality of samples may be a subset of the first plurality of samples, for example, if the first and second pluralities of samples are generated by one analog-to-digital converter. A clock and data recovery module is operable to produce a timing indication according the second digital signal. The second plurality of samples is sampled intermittently. The discontinuity between bursts of samples in the second signal corresponds to a duty cycle. A forward error correction module is operable to produce a digital error-corrected signal according to the first digital signal and the timing indication.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: December 4, 2018
    Assignee: Maxlinear, Inc.
    Inventors: Curtis Ling, Sheng Ye
  • Patent number: 10135641
    Abstract: A serializer-deserializer (SerDes) integrated circuit (IC) chip includes a first SerDes receiver circuit having a first input for coupling to a first SerDes link, and a first output. A second SerDes receiver circuit has a second input for coupling to a second SerDes link. The second SerDes receiver circuit includes a second output. Crosstalk filter circuitry is disposed between the first SerDes receiver circuit and the second SerDes receiver circuit.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: November 20, 2018
    Assignee: Aquantia Corp.
    Inventor: Hossein Sedarat
  • Patent number: 10085165
    Abstract: A wireless device receives messages indicating CSI measurement resources of cells belonging to at least two base stations or belonging to at least two sectors of a base station. The wireless device measures CSI employing at least CSI measurement resources of the cells. The wireless device quantizes the measured CSI jointly across cells and encodes and transmits the jointly quantized CSI. The wireless device receives a resource assignment for data packet(s). The wireless device receives signals carrying the data packets from multiple cells.
    Type: Grant
    Filed: July 11, 2015
    Date of Patent: September 25, 2018
    Assignee: Comcast Cable Communications, LLC
    Inventor: Esmael Hejazi Dinan
  • Patent number: 10020836
    Abstract: Methods and systems for reducing and eliminating the effects of reference signal leakage in multi-module radio-frequency systems, particularly for radio-frequency integrated-circuit devices. Isolation is provided by frequency shifting, by binary phase-shift keying of reference signals to furnish different reference signals with unique signatures to enable separation and discrimination, and by backwards sending of reference signals from receiver to transmitter to avoid contamination of receiver signals by leakage of transmitter reference signals. In addition to improving calibration, methods of the present invention also provide noise reduction in certain multiple-module radio frequency systems.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: July 10, 2018
    Assignee: VAYYAR IMAGING LTD.
    Inventors: Naftali Chayat, Jonathan Rosenfeld
  • Patent number: 10009126
    Abstract: Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) with multiple RF signal transmitters and RF signal receivers capable of concurrent operations. Multiple successions of test data packets from a tester to respective RF signal receivers of the DUT and multiple successions of responsive DUT data packets from respective RF signal transmitters of the DUT to the tester are conveyed such that multiple RF signal transmissions, multiple RF signal receptions, or RF signal transmission and reception are performed at least partially concurrently.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: June 26, 2018
    Assignee: LitePoint Corporation
    Inventors: Christian Volf Olgaard, Ruizu Wang, Zhiyong Huang
  • Patent number: 9954594
    Abstract: A method of channel estimation enhancement is provided. In a wireless communications system, a transmitting device transmits a long preamble frame comprising a first training field, a signal field, and a second training field. The signal field has a beam-change indicator bit indicates whether there is beam change between the first training field and the second training field. A receiving device receives the long preamble frame, performs a first channel estimation based on the first training field, and performs a second channel estimation based on the second training field. If the beam-change indicator bit indicates negative beam change, then the receiving device performs channel estimation enhancement by combining the first channel estimation and the second channel estimation. As a result, channel estimation performance is improved.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: April 24, 2018
    Assignee: MEDIATEK Singapore Pte. Ltd.
    Inventors: Jianhan Liu, Thomas Edward Pare, Jr., Chao-Chun Wang, James June-Ming Wang, YungPing Hsu
  • Patent number: 9887796
    Abstract: The present disclosure discloses a method for configuring a node, device and system. The method includes that: a sending node encapsulates configuration information in a wavelength label information frame, wherein the configuration information is configured to configure a downstream node; and the sending node loads the wavelength label information frame to an optical signal, and sends the wavelength label information frame and the optical signal.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: February 6, 2018
    Assignee: ZTE Corporation
    Inventors: Feng Hua, Huitao Wang, Bailin Shen
  • Patent number: 9787462
    Abstract: Methods and systems are provided for using decision feedback phase error correction during signal processing. When an input signal comprises a plurality of sub-carriers, each of the plurality of sub-carriers may be processed separately, for each one of the plurality sub-carriers error related information may be determined separately, based on the processing of that sub-carrier. Subsequent processing of at least one of the plurality of sub-carriers may then be adjusted based on determined error related information corresponding to one or more sub-carriers. In this regard, the subsequent processing of the at least one sub-carrier may be adjusted based on determined error related information for that sub-carrier, based on determined error related information for at least one other sub-carrier, or based on determined error related information corresponding to all of the sub-carriers. The error related information may comprise phase error related information.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: October 10, 2017
    Inventors: Curtis Ling, Timothy Gallagher
  • Patent number: 9768987
    Abstract: Systems and methods are provided for dynamic calibration of pre-distortion modification in transmitters. The pre-distortion modification may be applied during processing of an input signal for transmission, and feedback data, relating to the transmitter and/or processing performed after application of the pre-distortion modification in the transmitter, may be obtained. Adjustments to the pre-distortion modification may be determined based on the feedback data, and the adjustments to the pre-distortion modification may be applied in loop-back manner, thus enabling adjustment of pre-distortion modification dynamically based on real-time and current data. The pre-distortion modification may comprise modifying one or more signal characteristics, such as phase, frequency, and/or amplitude. Determining and/or applying the adjustments to the pre-distortion modification may be done periodically, based on one or more particular events, or conditionally.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: September 19, 2017
    Assignee: MAXLINEAR, INC.
    Inventors: Sridhar Ramesh, Timothy Gallagher, Ali Shahed hagh ghadam
  • Patent number: 9749025
    Abstract: A method and a radio apparatus for signal transmission in a Wireless Local Area Network (WLAN) system are discussed. The method according to an embodiment includes generating first and second very high throughput (VHT) fields including first and second control information, respectively; and transmitting a physical layer protocol data unit (PPDU) including the first and second VHT fields to at least one target station. The first VHT field includes an indicator indicating whether the PPDU is to be transmitted by using a single-user multiple input multiple output (SU-MIMO) scheme or a multi-user multiple input multiple output (MU-MIMO) scheme.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: August 29, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Dae Won Lee, Dong Wook Roh, Byeong Woo Kang, Yong Ho Seok, Yu Jin Noh, Bong Hoe Kim
  • Patent number: 9735811
    Abstract: A method and apparatus for compensating for nonlinearities in a non-linear device for manipulating a signal is described. Shortly before an initial discrete power increase is applied to the device, a first pre-distortion function is generated on the basis of a first set of DPD parameters and applied to the signal before it reaches the device. A predetermined time period after the initial power increase, the first pre-distortion function stops being applied to the signal, and a second pre-distortion function is generated on the basis of a second set of DPD parameters and applied to the signal. Shortly before a subsequent discrete power increase is applied to the device, the first pre-distortion function is generated on the basis of the first set of DPD parameters and applied to the signal.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: August 15, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Spendim Dalipi, Stefan Hamrin, Tobias Johansson
  • Patent number: 9584167
    Abstract: A wireless communication system including: a first communication device including: a processor configured to: compensate a distortion to a input signal based on a determined distortion compensation coefficient set, a amplifier configured to amplify the input signal to which the distortion is compensated, and a first antenna configured to: transmit the amplified signal to a second communication device, and receive a first feedback signal from the second communication device, the first feedback signal relating to an error that is detected in a received signal by the second communication device, the received signal corresponding to the transmitted signal, wherein a plurality of distortion compensation coefficient included in the determined distortion compensation coefficient set are adjusted based on the first feedback signal relating to the error that is detected in the received signal by the second communication device.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: February 28, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Kazuyoshi Kakinuma, Takanori Iwamatsu
  • Patent number: 9571154
    Abstract: Systems and methods are provided for removing interference from received signals. An interference control signal may be generated in a transceiver during transmission and reception of signals. The interference control signal may be generated based on a first interference control input corresponding to an input signal used in generating the transmitted signals, and a second interference control input corresponding to a model of a leakage of the transmitted signals onto the received signals. The model may be based on a first approximation of a transfer function for the leakage. The interference control signal may be combined with an intermediate signal generated during processing of the received signals, to generate a corresponding combined signal, and the combined signal may be applied during processing of the received signals.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: February 14, 2017
    Assignee: ENTROPIC COMMUNICATIONS, LLC
    Inventors: Branislav Petrovic, Shachar Kons, Michail Tsatsanis
  • Patent number: 9489008
    Abstract: A method and system for error logging that is independent of the clock frequency ratio in an I/O subsystem. In one embodiment of the invention, the I/O subsystem has an error logging mechanism with a fixed queue depth of two and is independent of the clock frequencies in the I/O subsystem. The I/O subsystem has two queue entries for storing or logging the uncorrectable errors. In one embodiment of the invention, the I/O subsystem has two queue entries for storing or logging the 128-bit TLP Header and the First Error Pointer (FEP) of the uncorrectable errors detected in the I/O subsystem.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: November 8, 2016
    Assignee: Intel Corporation
    Inventors: Ming Yi Lim, Su Wei Lim, Poh Thiam Teoh
  • Patent number: 9369191
    Abstract: Aspects described herein relate to selecting a rank for wireless communications using multiple transmit antenna layers. A first effective throughput achievable using a first rank and based at least in part on a first block error rate (BLER) associated with the first rank can be estimated along with a second effective throughput achievable using a second rank and based at least in part on a second BLER associated with the second rank. The first rank or second rank is selected to be used for transmitting communications over multiple transmit antenna layers based at least in part on comparing the first effective throughput to the second effective throughput, and the selection can be indicated to a transmitting entity from which the communications over the multiple transmit antenna layers are received.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: June 14, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Heechoon Lee, Feng Han, Sanaz Barghi, Sharad Deepak Sambhwani
  • Patent number: 9331765
    Abstract: A method, system and device are provided for using an indexed list of linearly independent, predetermined vectors Vref={vref1,. . . , vrefM} and channel knowledge H, G from each transmitter to compute and feedback equivalent channel matrix information Hi,jeq to its affiliated transmitter based on the assigned/determined rank of the receiver. With this information, each transmitter selects Li receivers and constructs a transmitted signal by applying a selected precoding matrix to the mixed rank data, thereby eliminating interference to the rest of the receivers in the network.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: May 3, 2016
    Assignee: BlackBerry Limited
    Inventors: Amin Mobasher, Yongkang Jia
  • Patent number: 9319896
    Abstract: A method of channel estimation enhancement is provided. In a wireless communications system, a transmitting device transmits a long preamble frame comprising a first training field, a signal field, and a second training field. The signal field has a beam-change indicator bit indicates whether there is beam change between the first training field and the second training field. A receiving device receives the long preamble frame, performs a first channel estimation based on the first training field, and performs a second channel estimation based on the second training field. If the beam-change indicator bit indicates negative beam change, then the receiving device performs channel estimation enhancement by combining the first channel estimation and the second channel estimation. As a result, channel estimation performance is improved.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: April 19, 2016
    Assignee: MEDIATEK Singapore Ple. Ltd.
    Inventors: Jianhan Liu, Thomas Edward Pare, Chao-Chun Wang, James June-Ming Wang, YungPing Hsu
  • Patent number: 9276763
    Abstract: The communication apparatus intermittently carries out receiving operation during a predetermined reception period. The apparatus includes a wireless communication section for carrying out wireless communication, which includes a carrier sensor for sensing a carrier at the beginning of the communication, and a carrier sense switching section for using carrier sense levels different between packet transmission and reception to switch the carrier sense level of the carrier sensor according to the packet. Thus, the apparatus can use and flexibly adjust the optimum carrier sense level for the intermittent receiving operation within the reception period.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: March 1, 2016
    Assignee: OKI ELECTRIC INDUSTRY CO., LTD.
    Inventor: Yuki Kubo
  • Patent number: 9232530
    Abstract: It is described a method for managing a radio transmission between a base station and a user equipment, wherein a communication channel is used for the radio transmission, wherein the communication channel includes a plurality of channel resources and is based on a MIMO transmission scheme. The method includes dividing the plurality of channel resources into a set of channel resource regions, assigning a MIMO rank to each channel resource region, wherein the MIMO rank is indicative for a number of channel resources to be used for a radio transmission within a corresponding channel resource region, selecting a channel resource region for the radio transmission between the base station and the user equipment, and managing the radio transmission between the base station and the user equipment based on the selected channel resource region and the corresponding assigned MIMO rank.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: January 5, 2016
    Assignee: Nokia Solutions and Networks Oy
    Inventors: Yuanye Wang, Klaus Ingemann Pedersen
  • Patent number: 9203598
    Abstract: Systems and methods of supporting video streaming operations may involve transmitting a pulse width modulated (PWM) control signal to an imaging device, wherein the imaging devices identifies control data based on a duty cycle of the control signal. The imaging device can configure a video stream based on the control data and synchronize transmission of the video stream based on a frequency of the control signal.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: December 1, 2015
    Assignee: Intel Corporation
    Inventors: Huimin Chen, Duane G. Quiet, David J. Harriman
  • Patent number: 9197281
    Abstract: An apparatus and method for applying digital pre-distortion (DPD) technology in an electronic device which uses an envelope tracking (ET) method is provided. The electronic device includes an antenna, a modem, a transceiver configured to convert a signal generated in the modem into a radio frequency signal, an ET modulator configured to supply power to a power amplifier based on an amplitude component of the signal generated in the modem, and the power amplifier configured to amplify power of a signal received from the transceiver based on an output signal of the ET modulator. The modem generates a signal by using a DPD) variable corresponding to output impedance of the power amplifier caused by the antenna from among a plurality of DPD variables.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: November 24, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ju-Ho Van, Hyun-Ju Hong
  • Patent number: 9191183
    Abstract: Methods and systems are provided for using decision feedback phase error correction during signal processing. When an input signal comprises a plurality of sub-carriers, each of the plurality of sub-carriers may be processed separately, wherein the processing may comprise determining for each one of the plurality sub-carriers error related information; and the determined error related information may be applied as separate feedback, such as to allow separately adjusting subsequent processing of the corresponding one of the plurality of sub-carriers. The error related information may comprise phase error related information. At least part of the error related information based on data carried by the corresponding one of the plurality of sub-carriers. The plurality of sub-carriers comprises orthogonal frequency-division multiplexing (OFDM) based sub-carriers. Error related information obtained from processing of at least some of the plurality of sub-carriers may be shared.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: November 17, 2015
    Inventors: Curtis Ling, Timothy Gallagher
  • Patent number: 9170837
    Abstract: A transaction concurrent execution control system carries out a control of concurrently executing a transaction. The transaction concurrent execution control system includes a transaction execution unit for executing the transaction, a back-off time determination unit for determining a waiting time until the transaction is re-executed when a commitment of the transaction has failed, and a transaction pooling unit for causing the transaction to stand by for re-execution until the waiting time has elapsed when the commitment of the transaction has failed.
    Type: Grant
    Filed: July 19, 2012
    Date of Patent: October 27, 2015
    Assignee: NEC CORPORATION
    Inventor: Teruki Sukenari
  • Patent number: 9106502
    Abstract: Some demonstrative embodiments include apparatuses, systems and/or methods of In-phase/Quadrature (I/Q) imbalance compensation. For example, an apparatus may include an I/Q imbalance calibrator to determine, based on first and second phasors, a plurality of calibration parameters for calibrating I/Q imbalance of both a Radio Frequency (RF) Receive (Rx) path of a transceiver and a RF Transmit (Tx) path of the transceiver, the first phasor including a phasor of an image component of a first signal transmitted via the Tx path, shifted by a first phase shift and received via the Rx path, and the second phasor including a phasor of an image component of a second signal transmitted via the Tx path, shifted by a second phase shift, different from the first phase shift, and received via the Rx path.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: August 11, 2015
    Assignee: INTEL CORPORATION
    Inventors: Moshe Teplitsky, Elan Banin, Michael Genossar
  • Patent number: 9100169
    Abstract: A system and method for channel state information feedback in wireless communications systems are provided. A method for reporting channel information includes determining, at a user equipment, a channel information type for first channel information to be reported to a communications controller, determining the first channel information conditioned on previously reported channel information and on the channel information type, and reporting the first channel information, the channel information type, or a combination thereof, to the communications controller.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: August 4, 2015
    Assignee: Futurewei Technologies, Inc.
    Inventors: Jianguo Wang, Yang Tang, Yongxing Zhou, David Mazzarese, Mattias Frenne
  • Patent number: 9042431
    Abstract: A transceiver with non-deterministic delay characteristics is analyzed and adjusted to provide a transceiver with deterministic delay characteristics. The transceiver may be implemented with a variety of device types to support high bandwidth operation over a wide range of frequencies. Deterministic behavior allows use of the transceiver in source synchronous interfaces. The transceiver may also be dynamically analyzed and adjusted during operation as operation frequency changes.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: May 26, 2015
    Assignee: Altera Corporation
    Inventors: Venkat Yadavalli, Sridhar Krishnamurthy, Gerardo Orlando, David Richardson King, Ken Clauss, Mark Krumpoch, Peter Markou
  • Patent number: 9037437
    Abstract: System and method for testing a high speed data path without generating a high speed bit clock, includes selecting a first high speed data path from a plurality of data paths for testing. Coherent clock data patterns are driven on one or more of remaining data paths of the plurality of data paths, wherein the coherent clock data patterns are in coherence with a low speed base clock. The first high speed data path is sampled by the coherent clock data patterns to generate a sampled first high speed data path, which is then tested at a speed of the low speed base clock.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: May 19, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Miao Li, Xiaohua Kong, Nam Van Dang, Cheng Zhong
  • Patent number: 9025646
    Abstract: A transceiver for reducing transmit signal leakage is described. The transceiver includes a downconverter that downconverts a receive signal to produce a feedback signal. The transceiver also includes a weight learning module that correlates the feedback signal with a transmit signal to obtain a weight. The transceiver further includes a transmit leakage estimator that obtains an estimated transmit leakage signal based on the weight and the transmit signal. The transceiver also includes a transmit leakage reducer that reduces the transmit leakage in the receive signal based on the estimated transmit leakage signal.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: May 5, 2015
    Assignee: QUALCOMM, Incorporated
    Inventor: Vladimir Aparin
  • Patent number: 9025693
    Abstract: Systems and methods that facilitate on-chip testing are provided. An integrated circuit can include a transmitter configured to transmit a communications signal via a communications channel. The integrated circuit can also include a receiver configured to receive the communications signal via the communications channel. A jitter creation module also can form part of the integrated circuit and can introduce jitter into the system thereby allowing for on-chip jitter testing. The jitter creation module can form either part of the transmitter or receiver and can introduce the jitter by phase interpolation.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: May 5, 2015
    Assignee: Broadcom Corporation
    Inventors: John Wang, Vasudevan Parthasarathy
  • Patent number: 9008161
    Abstract: A method for calibrating mismatches of an in-phase signal path and a quadrature signal path of a transmitter, including: additionally configuration at least one mixer calibration coefficient at a transmitting part of the transmitter; obtaining at least one mixer testing signal from the transmitting part via loopback for spectrum analysis to derive at least one mixer spectrum analysis result; adjusting the mixer calibration coefficient of the transmitting part according to the mixer spectrum analysis result; and additionally utilizing an in-phase signal path finite impulse response filter and a quadrature signal path finite impulse response filter to calibrate mismatches between a low pass filter of the in-phase signal path of the transmitting part of the transmitter and a low pass filter of the quadrature signal path of the transmitting part of the transmitter. A similar mismatch calibration operation may be applied to a receiver.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: April 14, 2015
    Assignee: Realtek Semiconductor Corp.
    Inventors: Yuan-Shuo Chang, Ching-Chia Cheng
  • Patent number: 9008157
    Abstract: A transceiver and a method of controlling aberrant transceiver operation. In one embodiment, the transceiver includes: (1) a processor, (2) an interrupt system coupled to the processor and having a flag register associated therewith, (3) detection circuits associated with corresponding functional units of the transceiver and configured to detect conditions regarding the corresponding functional units and set corresponding flags in the flag register, the interrupt system configured to assert interrupts in response thereto and (4) an interrupt-handing routine executable in the processor and configured to respond to the interrupts by carrying out at least one of loading parameters and generating warnings based on identities of the flags.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: April 14, 2015
    Assignee: Texas Instruments Incorporated
    Inventor: Khurram Muhammad
  • Patent number: 9001875
    Abstract: The disclosure can provide methods and systems for autocalibrating a transceiver. The method can include upconverting a bandpass input signal by mixing the bandpass input signal with a first local oscillator signal to form an initial transmitter signal. The initial transmitter signal can be looped back to a receiver and downconverted with a second local oscillator signal having a frequency that is different from the first local oscillator to form an intermediate frequency signal. At least one of a gain and a phase of the transmitter can be adjusted based on a transmitter image sideband of the intermediate frequency signal to generate a calibrated transmitter signal having minimized transmitter image sideband.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: April 7, 2015
    Assignee: Marvell International Ltd.
    Inventors: Lydi Smaini, Neric Fong, Sang Won Son, Bo Wang
  • Patent number: 8995517
    Abstract: The present invention relates to a device for the location of passive intermodulation faults in a coaxial cable network. The test apparatus (100) according to one embodiment of the present invention utilizes a pair of high-power, frequency-synthesized, unmodulated RF carriers v1(t) (101) and v2(t) (102) are generated inside the HPA module of the apparatus. The power and frequency of v1(t) (101) and v2(t) (102) can be independently set to a range of values, v1(t), v2(t) are combined inside the instrument and then applied to the input of the device under test (DUT). The PIM signals (107,108,109) generated in the DUT are combined to produce the primary PIM signal vIM(t) (103). The apparatus also includes two receivers (110,111, 112,113,114,115) for the detection of vIM(t) 103 and vREF(t) (104). These signals are downconverted to 455 kHz.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: March 31, 2015
    Assignee: Kaelus Pty Ltd
    Inventors: Greg Delforce, Brendan Horsfield
  • Patent number: 8995932
    Abstract: Systems and methods for suppressing transmitter noise in a receive band of a co-located receiver that are suitable for wideband applications are disclosed. In one embodiment, an analog radio frequency transmit signal output by a transmitter includes a desired signal in a transmit band of the transmitter and transmitter noise in a receive band of a main receiver. A secondary receiver obtains a secondary receiver input signal that is representative of at least the transmitter noise in the receive band of the main receiver and outputs a digital feedforward signal. A digital feedforward transmit noise cancellation subsystem generates a digital transmitter noise cancellation signal that is representative of the transmitter noise in the receive band based on the digital feedforward signal and subtracts the digital transmitter noise cancellation signal from a digital receive signal output by the main receiver to thereby provide a compensated digital receive signal.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: March 31, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Mark Wyville
  • Patent number: 8989307
    Abstract: A power amplifier system including a composite digital predistorter (DPD) ensuring optimized linearity for the power amplifier is described. In this system, a digital-to-analog converter (DAC), an analog filter, a first mixer, and the power amplifier are serially coupled to the composite DPD. A second mixer, a receive gain block, and an analog-to-digital converter (ADC) are serially coupled to the output of the power amplifier. A DPD training component is coupled between the inputs of the composite DPD and the ADC. The composite DPD includes a memory-based DPD, e.g., a memory polynomial (MP) DPD, a memoryless-linearizing DPD, e.g., a look-up table (LUT) DPD, and two multiplexers.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: March 24, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Hao Zhou, Ning Zhang
  • Patent number: 8982933
    Abstract: A communications system includes a target receiver having a passband and configured to receive an intended signal within the passband. The communications system also includes a jammer configured to jam the target receiver from receiving the intended signal. The jammer has at least one antenna, a jammer receiver coupled to the at least one antenna, a jammer transmitter coupled to the at least one antenna, and a controller configured to cooperate with the jammer receiver. The controller is configured to detect the intended signal and to generate an interfering signal comprising a continuous phase modulation (CPM) waveform having a constant envelope so that the interfering signal at least partially overlaps the passband of the target receiver.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: March 17, 2015
    Assignee: Harris Corporation
    Inventor: James A. Norris
  • Patent number: 8976850
    Abstract: Provided is a channel state information (CSI) sharing method and apparatus in a Multiple User Multiple Input Multiple Output (MU-MIMO) environment. Each node may use network-coding to reduce overhead necessary for sharing CSI between all nodes in the MU-MIMO environment. A transmitter may dynamically select, based on the CSI between receivers, a path used for transmitting data to each receiver and a receiver to be used as a relay based on the global CSI. A decoding performance may be improved based on the CSI between the transmitter and the receivers.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: March 10, 2015
    Assignees: Samsung Electronics Co., Ltd., Purdue Research Foundation
    Inventors: Bruno Clerckx, Jun Il Choi, Taejoon Kim, Obadamilola Aluko, David J. Love
  • Patent number: 8976874
    Abstract: In a modular signal mirroring system each point-to-point RF transceiver end has a controller module coupled to one or more I/O modules. The I/O modules have various input and output circuits. A signal received at the near end is reconstructed at the far end after being transmitted in an RF packet. The reconstructed signal may be the same as the input signal, inverted from the input signal or level-shifted from the input signal. It is representative of the input signal following the input signal's state after a time-quantization latency. Transmission between the two ends is via a periodic transmission controlled in a master slave protocol. If a transmission is not received in a timely manner or, in some systems, if intentional interference with transmissions is detected, the reconstructed signal is forced to a safe state determined by local switch settings. The settings include the last known good state.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: March 10, 2015
    Assignee: OleumTech Corporation
    Inventor: Matthew A. Tanner
  • Patent number: 8976848
    Abstract: A method and device for reducing interference between a first signal of the carrier current type (Se) transmitted between modems (MCPL) in an electrical network (Re) and a second signal (S) transmitted between modems (M) in another network (R), the signals (Se, S) being coded by distribution of the data over allocated carrier frequencies in the same reserved frequency band (BF). The method includes: a step of measurement, by each modem (MCPL) in the electrical network, of transmission characteristics of each carrier frequency (F) that may be used for coding the first signal (Se), a step of detection, by analysis of the measured transmission characteristics, of at least one second carrier frequency (F2,n), which is allocated or may be allocated for coding the second signal (S) and is common with at least one first carrier frequency (F1,m), which is allocated for coding the first signal (Se), and a step of optimization of the distribution of the data of the first signal (Se) over carrier frequencies.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: March 10, 2015
    Assignee: SAGEMCOM Broadband SAS
    Inventor: Roger Samy
  • Patent number: 8976847
    Abstract: A communications system provides a first communications device, which is connected via a bidirectional transmission channel to a second communications device, wherein the communications devices each comprise a data reconstruction unit. Each communications device comprises a control unit, which is provided for a configuration of various transmission parameters such as modulation type and/or code rate and/or transmitter power and/or size of data packets dependent upon a reliability value evaluated within the control unit. The reliability value indicates a probability for a reliability or a quality of a data reconstruction, which reconstructs transmitted data from received signals within the data reconstruction unit.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: March 10, 2015
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Henrik Schober, Torsten Langguth