By Signal Quality (e.g., Signal To Noise Ratio) Patents (Class 455/135)
  • Patent number: 10750518
    Abstract: An antenna system includes: a plurality of antennas; a switching unit, having a plurality of switches, wherein each of the plurality of switches and the corresponding antenna are in a conducting state or in a non-conducting state; a communication unit, connected with each of the plurality of switches of the switching unit, and coupled with the antennas, wherein the communication unit receives a reference value group of the corresponding antenna from the switch in the conducting state; and a control unit, connected with the switching unit and the communication unit, wherein the control unit receives the reference value group from the communication unit, and compares the reference value group with an threshold, to determine whether the reference value group conforms to a pre-determined condition or not, and outputs a restarting instruction to restart the switching unit when the reference value group does not satisfy the pre-determined condition.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: August 18, 2020
    Assignee: ASUSTEK COMPUTER INC.
    Inventors: Zih-Guang Liao, Wen-Hsin Lin, Ching-Chung Tang, Tsung-Hsun Hsieh, You-Fu Cheng
  • Patent number: 10623172
    Abstract: A method includes transmitting a data signal generated by adjusting a phase of a data signal, receiving a control signal having a frequency lower than that of the data signal and used to control an apparatus of a transmission destination of the data signal, and applying, in a case where a signal level of the control signal is a level, jitter to the data signal by periodically changing a magnitude of an additional phase code to be added to a phase code representative of an adjustment amount for the phase but fixing, in a case where the signal level is a level different from the level, the additional phase code to 0, receiving the data signal and adjusting a phase of the data signal to generate a data signal and restoring the control signal from a phase code representative of an adjustment amount for the phase.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: April 14, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Jun Matsui, Hisakatsu Yamaguchi
  • Patent number: 10511931
    Abstract: The disclosure herein describes receiving wireless signal strength data and detecting movement of a computing device relative to wireless access points based thereon. The computing device receives a signal strength data stream based on a wireless signal from a wireless access point. A signal strength range is determined based on the signal strength data stream during a learning time period while the computing device is within a defined area. The signal strength range indicates that the computing device is within the defined area associated with the wireless access point. During a detection time period, signal strength values outside of the signal strength range are detected and, based on the detected values, a notification is provided that indicates the computing device has moved outside the defined area. The described movement detection method provides rapid detection of movements of a computing device using already-obtained data that does not rely on interaction with other devices.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: December 17, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Jean Khawand, Gianluigi Nusca, Matthew T. Durak, Jorge A. González Martinez
  • Patent number: 10405299
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine that a reference signal (RS) transmission has been triggered. The UE may select a subset of antennas from a set of available antennas based on a signal property associated with each antenna of the subset of antennas. The UE may transmit the RS using the selected subset of antennas.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: September 3, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Alberto Rico Alvarino, Wanshi Chen, Hao Xu, Peter Gaal
  • Patent number: 10311259
    Abstract: The present disclosure provides methods and apparatuses for providing an audible feedback based on a proximity or a link quality between an external reader and a tag. The external reader transmits power to the tag with a radio frequency electromagnetic signal. The tag may rectify the radio frequency electromagnetic signal and create a rectified voltage. This rectified voltage may be used to power various components of the tag. Once it receives power from the reader, the tag may communicate information back to the external reader. The information communicated back to the reader is communicated by modulating an antenna impedance of the tag. By modulating the impedance, the tag will backscatter radiation transmitted by the reader. The reader is able to create an audio output based on determining the proximity or link quality from the reader to the tag based on the backscatter radiation it receives from the tag.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: June 4, 2019
    Assignee: VERILY LIFE SCIENCES LLC
    Inventors: Brian Otis, Nathan Pletcher
  • Patent number: 10148322
    Abstract: A demodulator including a peak sampler to control an ADC or a digital resampler to sample a carrier signal in an unmodulated state at peaks, and to sample the carrier signal in a modulated state at a phase of the unmodulated state; and an envelope builder to determine an envelope signal based on differentials between maximum and minimum peaks of respective cycles of the sampled carrier signal. Further, a demodulator having an offset estimator to estimate in-phase and quadrature components of a carrier signal in an unmodulated state to determine in-phase and quadrature component offsets; a load modulated signal estimator to estimate in-phase and quadrature components of a load modulated signal by removing the in-phase and quadrature component offsets from in-phase and quadrature component samples of the carrier signal; and an envelope builder to build an envelope signal by combining the in-phase and quadrature components of the load modulated signal.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: December 4, 2018
    Assignee: Intel IP Corporation
    Inventors: Jie Zhu, Sebastien Fievet, Sathish K. Kuttan
  • Patent number: 9941922
    Abstract: A system that incorporates teachings of the present disclosure may include, for example, a matching network including a tunable reactance circuit configured to be coupled to at least one of a transmitter portion and a receiver portion of a communication device, wherein the tunable reactance circuit is adjustable to a plurality of tuning states, and wherein the determination of a tuning state is based on parameters associated with a detected interference. Additional embodiments are disclosed.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: April 10, 2018
    Assignee: BlackBerry Limited
    Inventors: Keith Manssen, Matthew Russell Greene, Wayne Smith, David Schlueter, John Spears
  • Patent number: 9881188
    Abstract: The present disclosure provides methods and apparatuses for providing an audible feedback based on a proximity or a link quality between an external reader and a tag. The external reader transmits power to the tag with a radio frequency electromagnetic signal. The tag may rectify the radio frequency electromagnetic signal and create a rectified voltage. This rectified voltage may be used to power various components of the tag. Once it receives power from the reader, the tag may communicate information back to the external reader. The information communicated back to the reader is communicated by modulating an antenna impedance of the tag. By modulating the impedance, the tag will backscatter radiation transmitted by the reader. The reader is able to create an audio output based on determining the proximity or link quality from the reader to the tag based on the backscatter radiation it receives from the tag.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: January 30, 2018
    Assignee: Verily Life Sciences LLC
    Inventors: Brian Otis, Nathan Pletcher
  • Patent number: 9813262
    Abstract: A method, performed in a communication device having multiple transmitters, for selectively transmitting data using spatial diversity, includes determining a type of data to be transmitted, determining whether the type of data meets a data type criteria, which comprises determining whether the data includes priority data, and transmitting the data using spatial diversity when the type of data meets the data type criteria.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: November 7, 2017
    Assignee: Google Technology Holdings LLC
    Inventors: Armin W. Klomsdorf, William P. Alberth, Jr.
  • Patent number: 9590715
    Abstract: A mobile terminal reduces its power consumption by selectively switching between a diversity mode and a non-diversity mode. The mobile terminal monitors the total output power of two or more of its transmitters, and selectively switches between the diversity mode and the non-diversity mode based on the total output power. The mobile terminal may also selectively switch between the diversity and non-diversity modes based on a difference in output power levels between the two or more transmitters.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: March 7, 2017
    Assignees: Sony Corporation, Sony Mobile Communications AB
    Inventor: William O. Camp, Jr.
  • Patent number: 9542953
    Abstract: Methods and systems for managing and transmitting content are disclosed. A sample method can comprise determining signal-to-noise ratio information relating to one or more data blocks and determining a threshold signal-to-noise ratio. At least one of the one or more data blocks can be requested based upon respective signal-to-noise ratio information and the threshold signal-to-noise ratio.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: January 10, 2017
    Assignee: COMCAST CABLE COMMUNICATIONS, LLC
    Inventor: Ross Gilson
  • Patent number: 9509343
    Abstract: Apparatuses may be provided that contain wireless communications circuitry. The wireless communications circuitry may include radio-frequency transceiver circuitry coupled to multiple antennas. Signal strength measurements may be gathered using the antennas and corresponding signal strength difference measurements may be produced to reflect which of the antennas is exhibiting superior performing. Information may be gathered relating to the fading environment of the communications circuitry, such as whether the wireless communications circuitry is transitioning between a fast fading environment and a slow fading environment. For example, the wireless communications circuitry may further include a satellite positioning system receiver or an accelerometer, which may be used in gathering the information. The difference measurements may be filtered and compared to antenna switching criteria such as antenna switching thresholds.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: November 29, 2016
    Assignee: Apple Inc.
    Inventors: Syed A. Mujtaba, Kee-Bong Song
  • Patent number: 9450637
    Abstract: A system that incorporates teachings of the present disclosure may include, for example, a matching network including a tunable reactance circuit configured to be coupled to at least one of a transmitter portion and a receiver portion of a communication device, wherein the tunable reactance circuit is adjustable to a plurality of tuning states, and wherein the determination of a tuning state is based on parameters associated with a detected interference. Additional embodiments are disclosed.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: September 20, 2016
    Assignee: BlackBerry Limited
    Inventors: Keith Manssen, Matthew Russell Greene, Wayne Smith, David Schlueter, John Spears
  • Patent number: 9413066
    Abstract: A system that incorporates teachings of the subject disclosure may include, for example, determining antenna coupling among a plurality of antennas of the communication device and adjusting beam forming for the plurality of antennas utilizing phase shifters coupled with radiating elements of the plurality of antennas, where the adjusting of the beam forming is based on forming a desired antenna pattern that increases radiated throughput and reduces the antenna coupling among the plurality of antennas. Other embodiments are disclosed.
    Type: Grant
    Filed: July 19, 2012
    Date of Patent: August 9, 2016
    Assignee: BlackBerry Limited
    Inventors: Lizhong Zhu, Jun Xu, Fei He
  • Patent number: 9319928
    Abstract: A detailed design of an LTE Link Adaptation function for LTE uplink is disclosed. A new approach for adapting SINR backoff in OLLA is used when serving non-time-sensitive radio bearers without target BLER constraint. A sub-optimal scheduler is also disclosed wherein the SINR measurements at the ILLA input are updated on each TTI for the UEs scheduled in that sub-frame for future UL transmission with a fresher interference measurement from the sub-frame preceding by 8 ms the actual transmission sub-frame. This allows for exploitation of a correlation peak of the interference resulting from HARQ retransmissions. A schedule incorporating these features improves upon, with a minor complexity increase, the spectral efficiency performance of a low-complexity baseline scheduler only based on SINR updates at SRS rate.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: April 19, 2016
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Pierre Bertrand, Jing Jiang, Anthony Ekpenyong
  • Patent number: 9185585
    Abstract: A method of simulating transmission of data from a transmitter to a receiver in a radio communications network, the method including calculating an average amount of data to be transmitted to the receiver in a considered transmission time interval based on a relationship between an interferential condition assumed to be experienced at the receiver and a data transmission throughput, the relationship being determined by a link-level simulation of the link between the transmitter and the receiver.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: November 10, 2015
    Assignee: Telecom Italia S.p.A.
    Inventors: Paolo Goria, Davide Missan, Stefano Macagno, Alessandro Trogolo
  • Patent number: 9176233
    Abstract: Systems, apparatus and methods in a mobile device to multiplex two global navigation satellite system (GNSS) signals on a single hardware receiver chain are presented. The GNSS signals may come from a common GNSS system on two bands of two different GNSS systems overlapping on a common band. A duty cycle of the GNSS signals may be based on a harmonic being within one of the first band and the second band. The duty cycle may be based on signal quality, such as indicating a jammed or non jammed signal. The duty cycle may be of unequal proportions and less than 100% such that the receiver chain is idle for a percentage of time.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: November 3, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Alireza Khalili, Hong Sun Kim, Jin-Su Ko
  • Patent number: 9178592
    Abstract: Systems and methods are disclosed that implement multiple inter-chip (IC) links to communicate digital signals and data between multiple tuner circuit chips of a radio frequency (RF) antenna diversity system. The multiple IC communication links may be employed, for example, to simultaneously communicate different signals and/or data between individual tuner circuit chips of a multi-signal type antenna diversity system in an asynchronous manner, and may be employed to achieve simultaneous antenna diversity for multiple RF signal types using a scalable IC communication link architecture that includes multiple IC communication links to interconnect a varying number of RF tuner circuit chips.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: November 3, 2015
    Assignee: Silicon Laboratories Inc.
    Inventors: Younes Djadi, Russell Croman, Russell Schultz, Scott T. Haban
  • Patent number: 9113480
    Abstract: The present invention relates to a method for operating a secondary station comprising means for communicating with a primary station, the method comprising receiving from the primary station an interference status report, said interference status report comprising an spatial indication being representative of a spatial characteristic of the interference, measuring channel characteristics on reference symbols, and interpreting the measured channel characteristics with help of the interference status report.
    Type: Grant
    Filed: August 18, 2010
    Date of Patent: August 18, 2015
    Assignee: Koninklijke Philips N.V.
    Inventors: Timothy James Moulsley, Milos Tesanovic, Choo Chiap Chiau, Robert James Davies
  • Patent number: 9042853
    Abstract: Various embodiments provide for systems and methods for signal conversion of one modulated signal to another modulated signal using demodulation and then re-modulation. According to some embodiments, a signal receiving system may comprise an I/Q demodulator that demodulates a first modulated signal to an in-phase (“I”) signal and a quadrature (“Q”) signal, an I/Q signal adjustor that adaptively adjusts the Q signal to increase the signal-to-noise ratio (SNR) of a transitory signal that is based on a second modulated signal, and an I/Q modulator that modulates the I signal and the adjusted Q signal to the second modulated signal. To increase the SNR, the Q signal may be adjusted based on a calculated error determined for the transitory signal during demodulation by a demodulator downstream from the I/Q modulator.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: May 26, 2015
    Assignee: Aviat U.S., Inc.
    Inventors: Emerick Vann, Yen-Fang Chao, Youming Qin, Roland Matian
  • Patent number: 9008715
    Abstract: A method of and a mobile terminal for transmitting data over an uplink from a mobile terminal to a base station, the data being transmitted over radio bursts, the method comprising and the mobile terminal being suitable for: assessing radio propagation conditions between the mobile terminal and the base station; determining if the radio propagation conditions fulfil a predetermined condition; wherein if it is determined that the radio propagation conditions fulfil the predetermined condition the transmission energy parameters of the signal bursts are adapted to reduce the energy used to transmit the data.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: April 14, 2015
    Assignee: St-Ericsson SA
    Inventors: Mickael Bouyaud, Valère Delong
  • Publication number: 20150079916
    Abstract: A mobile internet radio receiver is disclosed which includes a radio interface for internet communication over a cellular mobile phone network. An internet audio signal source selects and outputs a first audio signal. At least one receiver part receives digital and/or analog radio signals, derives a second audio signal identical in content with the first audio signal from the radio signals, and outputs the second audio signal. A compare entity assesses the reception quality of the first and second audio signals, and outputs an audio signal output to which depending on the assessed reception quality, the first audio signal or the second audio signal can be applied.
    Type: Application
    Filed: September 11, 2014
    Publication date: March 19, 2015
    Inventors: Holger Wolf, Thomas Pfeffer
  • Publication number: 20150079917
    Abstract: Apparatus and methods for implementing “intelligent” receive diversity management in e.g., a mobile device. In one implementation, the mobile device includes an LTE-enabled UE, and the intelligent diversity management includes selectively disabling receive diversity (RxD) in that device upon meeting a plurality of criteria including (i) a capacity criterion, and (ii) a connectivity criterion. In one variant, the capacity criterion includes ensuring that an achievable data rate associated with a single Rx (receive) chain is comparable to that with RxD.
    Type: Application
    Filed: November 24, 2014
    Publication date: March 19, 2015
    Inventors: Syed Aon MUJTABA, Xiaowen Wang, Tarik Tabet, Kee-Bont Song, Youngjae Kim, Yuchul Kim
  • Patent number: 8965438
    Abstract: An antenna selection method includes respectively utilizing each antenna of a plurality of antennas to receive a plurality of transmission signals from a plurality of stations to generate a plurality of reception signals, respectively estimating a plurality of signal quality indicators corresponding to the plurality of stations according to the plurality of reception signals for each of the plurality of antennas, calculating a weighted sum of the plurality of corresponding signal quality indicators to generate a calculation result for each of the plurality of antennas, and selecting a receiving antenna from the plurality of antennas according to the corresponding calculation result of each of the plurality of antennas.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: February 24, 2015
    Assignee: Mediatek Inc.
    Inventors: Kuo-Wei Tseng, Chien-Chia Chen
  • Patent number: 8958839
    Abstract: In some examples, a method for power control of control channels in a radio communication system is described. The method may include transmitting, with a first transmission power, first scheduling data in a common search space of a PDCCH. The method may also include transmitting, with a second transmission power, second scheduling data in a specific search space of the PDCCH.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: February 17, 2015
    Assignee: Empire Technology Development LLC
    Inventor: Anpeng Huang
  • Patent number: 8942659
    Abstract: A method for selecting the state of a reconfigurable antenna installed at either the receiver or transmitter of a communication system is provided. The proposed method uses online learning algorithm based on the theory of multi-armed bandit to perform antenna state selection. The selection technique utilizes the Post-Processing Signal-to-Noise Ratio (PPSNR) as a reward metric and maximizes the long-term average reward over time. The performance of the learning based selection technique is empirically evaluated using wireless channel data. The data is collected in an indoor environment using a 2×2 MIMO OFDM system employing highly directional metamaterial Reconfigurable Leaky Wave Antennas. the learning based selection technique shows performance improvements in terms of average PPSNR and regret over conventional heuristic policies.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: January 27, 2015
    Assignee: Drexel University
    Inventors: Nikhil Gulati, David Gonzalez, Kapil R. Dandekar
  • Patent number: 8942756
    Abstract: An uplink power control technique may include a simplified maximum sector throughput (SMST) and a generalized maximum sector throughput (GMST). The SMST and GMST techniques may be used to determine a maximum sector throughput and cell-edge throughput to enhance the overall efficiency of the communication system. The uplink power control technique may determine the optimal uplink power value without collecting interference over thermal noise and without computing the individual channel losses in each neighboring sector.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: January 27, 2015
    Assignee: Intel Corporation
    Inventors: Yang Rongzhen, Wei Guan, Yin Hujun
  • Patent number: 8934833
    Abstract: A fast and efficient automated satellite constellation detection process can be implemented at least in part independent of in-band data in the satellite signal. The automated detection process iterates through a set of various predefined transponder settings to detect one or more accessible satellite constellations through each satellite dish connected directly or through a switch to a satellite receiver. The process determines whether the satellite receiver is able to lock onto a satellite signal at each transponder setting. Based on the combinations of which satellite constellations are available at each transponder setting, the process allocates a specific satellite constellation to each satellite dish. In one implementation, channel information can be used to further refine the detection and identification of accessible satellite constellations for each satellite dish.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: January 13, 2015
    Assignee: Microsoft Corporation
    Inventors: Lucian Dragne, Rathe Hollingum, Gunther Logemann, Lorcan Mooney
  • Patent number: 8934939
    Abstract: In a wireless communications system, a serving base station performs outer and closed power control for an overhead channel and a traffic channel for data, either of which can carry an acknowledgement (Ack) channel and Channel Quality Indicator (CQI) channel on an uplink from User Equipment (UE). In an exemplary aspect, data packet communication is implemented in 3GPP LTE Rel. 8 wherein the uplink has a Single Carrier Frequency Division Multiplex (SC-FDM) uplink waveform. The UE performs open loop power control by a determining transmit power spectral density value by using received energy per symbol for a reference signal.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: January 13, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Rashid Ahmed Akbar Attar, Donna Ghosh, Christopher Gerard Lott
  • Patent number: 8934635
    Abstract: A method of optimizing stereo reception for an analog radio by applying the demodulated right sound signal (SD) and left sound signal (SG) as input to a decorrelation module having a variable decorrelation rate. The decorrelation rate of the decorrelation module is modified as a function of the reception quality coefficient “alpha” provided by the radio. The decorrelation module applies a higher decorrelation rate for a smaller reception quality coefficient “alpha” and applies a lower decorrelation rate for a larger reception quality coefficient “alpha. Also, a module for generating high-pitched sounds to recreate the high-frequency component (SHF) of the right or left sound signals which has been removed in the event of poor reception.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: January 13, 2015
    Assignee: Arkamys
    Inventors: Thomas Esnault, Frédéric Amadu
  • Patent number: 8928526
    Abstract: Techniques for monitoring transmission performance of a satellite communications systems are provided, including techniques for measuring the primary contributors to the end-to-end SNR, including the uplink SNR, the downlink SNR, and the C/I for each link in the network. These individual measurements are used to estimate satellite effective isotropic radiated power (EIRP), satellite antenna gain-to-noise-temperature (G/T), and loss due to an Earth Terminal pointing error. The EIRP, satellite antenna G/T and loss due to Earth terminal pointing error may then be used to determine operating parameters for the satellite communications network that enable the network to operate more efficiently.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: January 6, 2015
    Assignee: ViaSat, Inc.
    Inventor: Mark J. Miller
  • Patent number: 8929484
    Abstract: A communications transmitter includes a baseband processor configured to generate amplitude, angle, in-phase and quadrature baseband signals and a combination modulator that is configurable to modulate in the polar domain and, alternatively, in the quadrature domain. The combination modulator includes a quadrature modulator and a separate and distinct angle modulator that is configured to serve as a local oscillator for the quadrature modulator. In one embodiment of the invention the combination modulator is configured to modulate in the quadrature domain when the transmitter is operating according to a first communications condition (e.g., first transmit power level or first modulation scheme) and is configured to modulate in the polar domain when the transmitter is operating according to a second communications condition (e.g., second transmit power level or second modulation scheme).
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: January 6, 2015
    Inventor: Earl W. McCune, Jr.
  • Patent number: 8923779
    Abstract: Systems and methods for tuning an antenna for a frequency modulation (FM) transceiver are provided. A representative system includes: a network of electrical adjustable passive components that receives and sends radio frequency (RF) signals to a receiver circuitry via the network of electrical adjustable passive components. The receiver circuitry determines the received signal strength indication (RSSI) of the RF signal. The system further includes a transmitter circuitry that transmits RF signals via the network of electrical adjustable passive components, and a peak detector circuitry that receives and determines a voltage output of the RF signals from the variable capacitors. An auto-tune circuitry receives the RSSI and output value from the receiver circuitry and the peak detector circuitry, respectively.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: December 30, 2014
    Assignee: CSR Technology Inc.
    Inventors: Noshir Dubash, Thomas E. Ricks, Jr., Richard J. McConnell
  • Patent number: 8903341
    Abstract: Certain aspects of the present disclosure provide ordering techniques for a Successive Interference Cancellation (SIC) receiver which may be used to robustly choose a correct stream for first decode under varying data rates, SNR and mobile propagation conditions in Multiple Input Multiple Output (MIMO) systems. The SIC ordering techniques discussed in the disclosure include SNR and/or Rate based information theoretic approach. For example, the SIC receiver may evaluate an SNR based or RATE-based information theoretic metric for the MIMO streams and choose one stream with a higher value of the metric for decoding first. A speculative single code block based approach is may also be used for selecting a stream for first decode, by leveraging the presence of per code block Cyclic Redundancy Check (CRC) and the lack of time diversity in LTE systems.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: December 2, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Supratik Bhattacharjee, Brian Clarke Banister
  • Patent number: 8902799
    Abstract: Methods and apparatus for power reduction in a wireless device having multiple receive paths are described herein. A wireless device configured for any one of multiple operating modes may utilize multiple receive signal paths to improve the receive signal quality in each of the operating modes. The wireless device may be configured to dynamically reconfigure a modulation coding scheme to compensate for varying signal qualities in some modes. The wireless receiver may be configured in other operating modes where the modulation coding scheme is fixed for a duration of the operating mode. The wireless device can conserve power when it is operating in a mode supporting a constant modulation coding scheme. The wireless device can determine a signal metric value of the received signals and can selectively power down or deactivate a receive signal path based on the value of the signal metric.
    Type: Grant
    Filed: January 16, 2008
    Date of Patent: December 2, 2014
    Assignee: Wi-LAN, Inc.
    Inventor: Todd R. Sutton
  • Patent number: 8897343
    Abstract: A diversity receiver comprises a plurality of receiving paths connected to a receiver circuit. Each of the receiving paths comprises an antenna receiving a signal, connected to a matching network connected to a receive amplifier. The receiver circuit is connected to a signal level comparison circuit for providing a relative comparison value indicating one of the receiving paths receiving the signal with a relative maximum strength. The signal level comparison circuit comprises a comparator circuit connected to the receiver circuit receiving a currently received signal level, and to a logic control unit being arranged to select one of the receive paths to provide the currently received signal to the receiver circuit.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: November 25, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventor: Laurent Gauthier
  • Patent number: 8874027
    Abstract: A method for controlling gain in a wireless repeater implementing echo cancellation determines a signal-to-interference-noise-ratio (SINR) of the input and output signals of the repeater and adjusts the gain of the repeater to optimize an achievable data rate and a coverage area of the repeater. The repeater gain may be decreased to increase the data rate and increase the achievable SINR of the output signal while the coverage area is reduced. Alternately, the repeater gain may be increased to decrease the data rate and decrease the achievable SINR of the output signal while the coverage area is increased.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: October 28, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Dhananjay Ashok Gore, Gwendolyn Denise Barriac, Sanjiv Nanda
  • Patent number: 8867648
    Abstract: The present application discloses a method for reporting channel status information in a multi antenna wireless communication system. In more detail, the method includes: receiving a reference signal from a base station; calculating the optimum precoding matrix index (PMI), at which the intensity of a signal from the base station is maximized, on the basis of the reference signal: determining at least one interference PMI from the base station on the assumption that a plurality of interference PMIs corresponding to the optimum PIM are applied; and transmitting information on at least one determined interference PMI to the base station. Beams corresponding to the plurality of interference PMIs are orthogonal to the beams corresponding to the optimum PMI.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: October 21, 2014
    Assignee: LG Electronics Inc.
    Inventors: Hyungtae Kim, Hanbyul Seo, Daewon Lee
  • Patent number: 8861481
    Abstract: A method and apparatus for measuring the quality of wireless channels based on a result obtained by measuring contentions between stations in a wireless network employing a carrier sense multiple access/collision avoidance (CSMA/CA) medium access control (MAC) method specified in the IEEE 802.11 standard are provided. The method includes determining contentions between stations to transmit frames via a wireless channel that uses a contention-based medium access method, and measuring the quality of the wireless channel based on the determined contentions.
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: October 14, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jeong-hwan Seo, Se-hong Kim, Byung-in Mun, Sang-su Nam, Hye-eun Choi
  • Patent number: 8862081
    Abstract: Methods and apparatus for implementing a wireless communication transceiver having receive path performance diversity. The transceiver implements a plurality of signal paths that can be configured as diversity receive paths. Each of the plurality of signal paths includes a distinct RF filter. Each RF filter can be configured to provide a distinct jammer rejection profile. Each receive path also includes a jammer detector, that can be a multiple level jammer detector. Each jammer detector operates to control a level of processing gain applied to the signals in its receive path. The multiple gain scaled receive signals can be combined in a coherent combiner before being routed for further processing.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: October 14, 2014
    Assignee: Wi-LAN, Inc.
    Inventors: Todd Sutton, James Stump, Hardik Patel, Laddan Hashemian
  • Patent number: 8862177
    Abstract: A power control method applied to a radio network controller (RNC), a node B and a user equipment is provided. The method include steps of: determining a target block error rate; identify an initial signal-to-interference ratio (SIR) from a history look-up table (LUT) according to the target block error rate; estimating a measured block error rate between the RNC and the node B via the RNC; adjusting the initial SIR with reference to the measured block error rate and the target block error rate to generate an updated SIR; and controlling a signal transmission power of the user equipment with reference to the updated SIR via the node B.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: October 14, 2014
    Assignee: Sernet (Suzhou) Technologies Corporation
    Inventor: Ling Zhu
  • Patent number: 8855700
    Abstract: A power control applied to a radio network controller (40) when a user equipment (300) is in communication with a serving radio base station (10) and at least one other radio base station (20) involves the radio network controller (40) providing a quality representation of an uplink control channel (12) from the user equipment (300) to the serving radio base station (10). The radio network controller (40) generates an updated power quality target for a reference control channel based on the quality representation and transmits the updated power quality target to at least one of the serving radio base station (10) and the at least one other radio base station (20). Alternatively, the radio network controller (40) generates an updated power offset for the uplink control channel (12) relative a reference control channel based on the quality representation and transmits the updated power offset to the user equipment (300).
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: October 7, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Mats Blomgren, Johan Hultell, Klas Johansson
  • Patent number: 8849327
    Abstract: An apparatus and a method for controlling power in a wireless communication system are provided. The method includes receiving interference information comprising a resource usage rate, from at least one neighboring BS, calculating a throughput variance amount, which is expected if the serving BS changes power, experienced by the at least one neighboring BS, by using the interference information, calculating a throughput variance amount, which is expected if the serving BS changes power, of at least one Mobile Station (MS) having access to the serving BS, and controlling power for the at least one MS by using the throughput variance amount experienced by the at least one neighboring BS and the throughput variance amount of the at least one MS. The interference information represents a throughput variance amount generated in the at least one neighboring BS when the serving BS changes the power.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: September 30, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Nam-Koo Kang
  • Patent number: 8838163
    Abstract: A base station in a wireless communication system and a method for controlling power by the same are provided. The method includes receiving channel state information from a mobile terminal, calculating information regarding a Modulation order Product code Rate (MPR) of the mobile terminal using the channel state information, and controlling transmission power for the mobile terminal according to the information regarding the MPR.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: September 16, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-Hyun Yang, Seung-Hee Han, Seung-Joo Maeng, Il-Won Kwon, Jeong-Heon Kim, Seung-Hyun Min, Ji-Won Lee, Seung-Hyeon Nahm
  • Patent number: 8831636
    Abstract: A method of operating a mobile device by recognizing a user's gesture and a mobile device that uses the method, the method includes recognizing the user's gesture and circumstance information; generating circumstantial gesture information according to a combination of the recognized gesture and the circumstance information; and executing an application item corresponding to the circumstantial gesture information.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: September 9, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young-suk Kim, Kyung-eun Lee, Jun-ho Koh, Hae-sik Jun
  • Patent number: 8830332
    Abstract: According to one embodiment, an electronic device receives a broadcast signal includes a high-speed transmission channel and a low-speed transmission channel. The electronic device estimates a CN when the electronic device is in an environment corresponding to a stationary state, based on a measured reception power, reception sensitivity required for receiving a broadcast service of the high-speed transmission channel and a necessary CN required for receiving the broadcast service of the high-speed transmission channel, and controls a processing of switching a demodulation target between the high-speed transmission channel and the low-speed transmission channel, based on a difference between the estimated CN and the measured CN.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: September 9, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kengo Kurose, Yuki Hayashi
  • Patent number: 8825103
    Abstract: A quality measuring section measures reception quality of a radio signal received by a wireless communication section. A quality information transmitting section transmits reception quality information indicating the reception quality measured by the quality measuring section. A device number calculating section calculates, based on reception quality indicated by reception quality information transmitted from other wireless communication devices and the reception quality measured by the quality measuring section, the number of wireless communication devices, from among the other wireless communication devices, that can communicate with the wireless communication device including this device number calculating section.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: September 2, 2014
    Assignee: Nec Corporation
    Inventors: Toru Yamamoto, Saho Furukawa
  • Patent number: 8824535
    Abstract: There are disclosed systems and methods that dynamically vary the word length of data being transmitted through a digital interface. In one embodiment, the method comprises: (i) obtaining at least one parameter indicative of a quality of a signal; (ii) if the at least one parameter indicates that the quality of the signal is above a threshold, then transmitting the data as a number of digital words at a first predetermined word length; (ii) if the at least one parameter indicates that the quality of the signal is below the threshold, then transmitting the data as a number of digital words at a second predetermined word length. The second predetermined word length is different from the first predetermined word length.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: September 2, 2014
    Assignee: BlackBerry Limited
    Inventors: Jianfeng Weng, Yangwen Liang, Xing Qian, Qing Feng Xu, Christopher Eugene Snyder
  • Patent number: 8818315
    Abstract: Signal quality of a composite received signal in a radio communication network is optimized by adjusting a phase offset between received and/or transmitted signals based on signal quality parameters of the received and/or transmitted signals. The phase offset is adjusted by varying the phase offset between the received or transmitted signals such that that the composite signal is circularly, elliptically, or linearly polarized. The phase offset between the received or transmitted signals is continually adjusted based on the received signal quality parameters.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: August 26, 2014
    Assignee: AT&T Mobility II LLC
    Inventors: John E. Lewis, Melvin D. Frerking, David G. Shively
  • Patent number: 8817861
    Abstract: A complex condition determination unit is provided, having an error-pulse switching determination unit which outputs, as error-pulse determination information, information indicating whether an accumulated value of the number of error pulses is equal to or greater than a predetermined error-pulse threshold value; a CNR (carrier to noise ratio) modulation scheme determination unit which outputs, as CNR determination information, a modulation scheme determined in accordance with CNR information indicating the CNR of the received signal; an RSL (receive signal level) modulation scheme determination unit which outputs, as RSL determination information, a modulation scheme determined in accordance with RSL information indicating the RSL of the received signal; and a complex modulation scheme determination unit which determines the modulation scheme for the transmission source, in accordance with the error-pulse determination information, the CNR determination information, the RSL determination information, and the
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: August 26, 2014
    Assignee: NEC Corporation
    Inventor: Mitsuhiro Honda