Signal Strength Patents (Class 455/115.3)
  • Patent number: 10117144
    Abstract: A method, an apparatus, and a computer-readable medium for wireless communication are provided. The apparatus may include memory and at least one processor, coupled to the memory, configured to determine a power parameter associated with communication using a first radio access technology (RAT). The at least one processor may be further configured to determine a quality parameter associated with the communication using the first RAT. The at least one processor may be further configured to apply, based on the quality parameter, an offset to the power parameter to form a modified power parameter. The at least one processor may be further configured to transmit a measurement report including the modified power parameter. The apparatus may be a wireless device, such as a user equipment (UE) and, more specifically, a high gain UE.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: October 30, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Manjinder Singh Sandhu, Madhusudan Kinthada Venkata, Raj Surya Pratha, Siva Kumar Jujaray, Srinivasan Balasubramanian, Patrick James Kusbel, Joshua Tennyson MacDonald
  • Patent number: 10020837
    Abstract: A system and methods for cancelling transmission leakage signals in a wide bandwidth Distributed Antenna System (“DAS”) having remote units is disclosed. An internal cancellation circuit within the remote unit is employed to reduce the transmitted leakage signals by generating a cancellation signal. This cancellation signal is added to the received signal to cancel the transmission leakage signal in the receiving signal path. A pilot signal generation circuit is employed to optimize the cancellation circuit operating parameters. The frequency of the pilot signal is swept over a range to determine the pilot frequency having the highest electromagnetic coupling. The amplitude and phase of the cancellation signal is then optimized to minimize the level of transmission leakage in the receiving transmission path.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: July 10, 2018
    Assignee: Intel Corporation
    Inventor: Richard Neil Braithwaite
  • Patent number: 9930619
    Abstract: A method for operating of an electronic device includes: connecting communication with an external electronic device; identifying state information and service information of the electronic device and the external electronic device; and selecting at least one communication method based on the state information and the service information. An electronic device includes a communication module and a processor. The processor is configured to select at least one communication method from a plurality of communication methods based on state information and service information of the electronic device and the external electronic device.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: March 27, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Gi-Beom Kim, Hyuk Kang, Chun-Ho Park, Jun-Hak Lim, Jun-Sik Kwon, Hyun-Ju Lee
  • Patent number: 9843983
    Abstract: A communication system dynamically controls a User Equipment (UE) handover for multiple repeaters linked in series that include a source repeater and target repeater. The communication system determines individual UE loading for each of the multiple repeaters. The communication system modifies a handover threshold between the source repeater and the target repeater based on the UE loading for each of the multiple repeaters in the series. The communication system serves the UE over the source repeater and applies the modified handover threshold to a signal strength difference between the source repeater and the target repeater. The communication system inhibits the UE handover from the source repeater to the target repeater if the signal strength difference for the UE falls below the modified handover threshold and initiates the UE handover from the source repeater to the target repeater if the signal strength difference for the UE reaches the modified handover threshold.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: December 12, 2017
    Assignee: Sprint Communications Company L.P.
    Inventors: Maneesh Gauba, Sreekar Marupaduga, Nitesh Manchanda, Vanil Parihar, Gene S. Mitchell
  • Patent number: 9699230
    Abstract: A method includes determining, at a server associated with a wireless communications network, a first set of multimedia content items to be transmitted via a multimedia broadcast multicast services (MBMS) broadcast transmission to multiple devices. The first set of multimedia content items may be determined based on a data traffic profile of the wireless communication network. The server may select a particular node of the wireless communications network to transmit the first set of multimedia content items via the MBMS broadcast transmission. The method also includes determining a second set of multimedia content items to be transmitted from the selected node to a particular device via a unicast transmission. The second set of multimedia content items may be determined based on a content request profile associated with the particular device.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: July 4, 2017
    Assignee: AT&T MOBILITY II LLC
    Inventors: Iftekhar Alam, Patrick Mascarenhas, Ming-Ju Ho
  • Patent number: 9698861
    Abstract: A system and methods for cancelling transmission leakage signals in a wide bandwidth Distributed Antenna System (“DAS”) having remote units is disclosed. An internal cancellation circuit within the remote unit is employed to reduce the transmitted leakage signals by generating a cancellation signal. This cancellation signal is added to the received signal to cancel the transmission leakage signal in the receiving signal path. A pilot signal generation circuit is employed to optimize the cancellation circuit operating parameters. The frequency of the pilot signal is swept over a range to determine the pilot frequency having the highest electromagnetic coupling. The amplitude and phase of the cancellation signal is then optimized to minimize the level of transmission leakage in the receiving transmission path.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: July 4, 2017
    Assignee: Intel Corporation
    Inventor: Richard Neil Braithwaite
  • Patent number: 9648511
    Abstract: A method of measuring channel information using a terminal in a communication system, according to an embodiment of the present invention, includes the steps of: receiving channel measurement setup information from a base station; entering an idle mode in the state of communication with the base station; measuring information indicating according to the channel measurement setup information; and transmitting a signal including the measured information to the base station.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: May 9, 2017
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Sang Bum Kim, Soeng Hun Kim
  • Patent number: 9608741
    Abstract: A system and method of an electronic apparatus for use in a communication system includes a switching module arranged to combine a plurality of input signals received by a plurality of input ports in connection with the switching module to define a combined input signal having a plurality of frequency components; and a loading module arranged to receive the combined input signal from the switching module and to individually separate each of the plurality of frequency components of the combined input signal by processing the combined input signal with a plurality of resonating networks, each arranged to resonate at a resonance frequency associated with each of the plurality of frequency components of the combined input signals.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: March 28, 2017
    Assignee: City University of Hong Kong
    Inventors: Quan Xue, Wai Lun Lam, Kam Man Shum
  • Patent number: 9568522
    Abstract: An electrical phase (e.g., a phase from among three-phase power) connected to an electrical meter may be determined. In one example of the techniques, changes in energy or power (e.g., a derivative or differences) may be determined based at least in part on measurements from each of a plurality of meters. Changes in energy or power may be determined based at least in part on electrical transmissions measured at each of the phases of a feeder. A meter may be selected from among the plurality of meters. For each of the plurality of electrical phases, the changes in energy or power measured by the meter may be compared or correlated to the changes in energy or power measured at the feeder. A phase that is connected to the meter may be determined, from among the plurality of electrical phases, based at least in part on the comparisons or correlations.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: February 14, 2017
    Assignee: Itron, Inc.
    Inventors: Roberto Aiello, Patrick Amihood
  • Patent number: 9510299
    Abstract: A first wireless device including a receiver, a signal strength module, a path loss module, and a control module. The receiver receives a first signal from a second wireless device. The first signal includes an indication of a first power at which the second wireless device transmits the first signal. The signal strength module estimates a first signal strength of the first signal. The path loss module estimates a path loss associated with a communication path between the first wireless device and the second wireless device based on the first power at which the second wireless device transmits the first signal and the first signal strength of the first signal received from the second wireless device. The control module controls a second power at which the first wireless device transmits data based on the path loss associated with the communication path between the first wireless device and the second wireless device.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: November 29, 2016
    Assignee: Marvell International LTD.
    Inventor: Kapil Chhabra
  • Patent number: 9491731
    Abstract: A method for positioning in a communication network with a cellular coverage is disclosed, wherein comprising the following steps: receiving location-dependent data concerning a mobile device; from a plurality of fingerprints, each of which corresponds to one of locations within the coverage, retrieving one having the highest similarity to the location-dependent data; and determining the location corresponding to the fingerprint with the highest similarity as the mobile device's location if the highest similarity exceeds a predetermined threshold.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: November 8, 2016
    Assignee: TELEFONAKTIEBOLAGET L M ERICSSON
    Inventors: Liang Shi, Bin He, Linjiang Li, Zhongqiu Lin, Aijun Yu
  • Patent number: 9456366
    Abstract: Techniques are described for alert-triggered recording spectrum data. In one embodiment, a method comprises determining whether network performance for one or more communications channels of a wireless network is below a threshold. In response to determining that the network performance for the one or more communications channels of the wireless network is below the threshold, recording of spectrum data for energy on the one or more communications channels of the wireless network is initiated. In an embodiment, determining whether network performance is below a threshold comprises determining whether the quality of at least one communications channel is below a threshold. In another embodiment, determining whether network performance is below a threshold comprises determining whether one or more network parameters monitored on one or more network elements indicate that network performance is below a threshold.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: September 27, 2016
    Assignee: Broadcom Corporation
    Inventors: John Morton, Mike Gibson, Bob Mayer
  • Patent number: 9413324
    Abstract: An electronic component includes an input port, a first output port, a ground port, a first capacitor and a second capacitor that are electrically connected in series to one another in a path between the input port and the first output port, a first inductor connected between the ground port and a portion of the path between the input port and the first output port, a second inductor electrically connected in parallel to the second capacitor, and a first sub line, wherein the second inductor and the first sub line define a first directional coupler by generating electromagnetic coupling therebetween.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: August 9, 2016
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Akira Tanaka
  • Patent number: 9406026
    Abstract: A system may include first and second qubits that cross one another and a first coupler having a perimeter that encompasses at least a part of the portions of the first and second qubits, the first coupler being operable to ferromagnetically or anti-ferromagnetically couple the first and the second qubits together. A multi-layered computer chip may include a first plurality N of qubits laid out in a first metal layer, a second plurality M of qubits laid out at least partially in a second metal layer that cross each of the qubits of the first plurality of qubits, and a first plurality N times M of coupling devices that at least partially encompasses an area where a respective pair of the qubits from the first and the second plurality of qubits cross each other.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: August 2, 2016
    Assignee: D•WAVE SYSTEMS INC.
    Inventors: Paul Bunyk, Felix Maibaum
  • Patent number: 9380543
    Abstract: An apparatus is capable of transmitting a signal through a Random Access Channel in a wireless communication system. The method of transmitting a signal through a random access channel includes estimating a reverse channel status using a signal received through a forward link, determining whether to transmit a signal through a random access channel in consideration of the reverse channel status, and transmitting a signal through the random access channel when it is determined to transmit a signal through the random access channel.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: June 28, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Hi-Chan Moon
  • Patent number: 9351265
    Abstract: An apparatus is capable of transmitting a signal through a Random Access Channel in a wireless communication system. The method of transmitting a signal through a random access channel includes estimating a reverse channel status using a signal received through a forward link, determining whether to transmit a signal through a random access channel in consideration of the reverse channel status, and transmitting a signal through the random access channel when it is determined to transmit a signal through the random access channel.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: May 24, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Hi-Chan Moon
  • Patent number: 9214967
    Abstract: Disclosed are circuits and methods for reducing insertion loss effects associated with radio-frequency (RF) power couplers. In some implementations, an RF circuit can include a first path configured to route a first RF signal in a first band, and a second path configured to route a second RF signal in a second band. The RF circuit can further include a power detector having a first coupler configured to detect power along the first path, and a second coupler configured to detect power along the second path. The first coupler and the second couplers can be connected in a daisy-chain configuration. The RF circuit can further include an adjustment circuit implemented along at least one of the first path and the second paths. The adjustment circuit can be configured to move a frequency response feature associated with the power detector to a different frequency range.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: December 15, 2015
    Assignee: Skyworks Solutions, Inc.
    Inventors: Russ Alan Reisner, John C Baldwin
  • Patent number: 9109897
    Abstract: An approach for generating optimal itineraries based on network connectivity is presented. A computer receives a first message from which a current position of a vehicle on a trip, destination, a service being requested for a mobile device in the vehicle, service providers and network(s) are extracted. Network connectivity measures are retrieved and signal qualities in respective cells are determined based on the network connectivity measures. Based on the signal qualities, an itinerary is determined as paths and a hop indicating a position on one of the paths at which a connectivity change from a first to a second service provider is to occur. A response to the first message indicates the itinerary. Sending the response results in the mobile device making the connectivity change when the vehicle reaches the position indicated by the hop.
    Type: Grant
    Filed: January 2, 2013
    Date of Patent: August 18, 2015
    Assignee: International Business Machines Corporation
    Inventors: Frederic Bauchot, Jean-Claude Dispensa, Francois-Xavier Drouet, Gerard Marmigere
  • Patent number: 9031527
    Abstract: Apparatus, systems, and methods implementing techniques for calibrating a filter circuit. A comparator generates an output based on a filter output amplitude signal and a reference amplitude signal. A calibration logic unit receives the comparator output and produces a component code that is used by the filter circuit to adjust one or more component values.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: May 12, 2015
    Assignee: Marvell International Ltd.
    Inventors: King Chun Tsai, Sang Wong Son, Wayne A. Loeb
  • Patent number: 9014642
    Abstract: A radio wave receiver that receives two different sets of radio waves and displays intensity of the received radio waves. First and second radio wave processing portions receive respective radio waves and output various kinds of information, such as video information and audio information. A switching portion receives output signals from the first and second radio wave processing portions, and switches the output signals according to a switching instruction of a controller to supply the output signals to a display portion and a speaker. The controller causes the intensities of the received radio waves in respective tuners of the first and second radio wave processing portions to be displayed simultaneously or in a switching manner based on a user's operation irrespective of which tuner's received radio waves are being processed.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: April 21, 2015
    Assignee: Kyocera Corporation
    Inventor: Tsurumi Ito
  • Patent number: 9002374
    Abstract: A method of obtaining and using access point signal information includes: receiving signals at a mobile device from a first set of access points during a passive measurement; and performing a first active measurement at the mobile device for the first set of the access points, including: sending at least one first communication each sent toward a respective one of the access points of the first set; and receiving at least one second communication each corresponding to, and responsive to, one of the at least one first communication and received from a corresponding one of the access points of the first set; where the passive measurement and the first active measurement is each performed repeatedly with the first set of the access points being reestablished at each repeat performance of the passive measurement, and with the passive measurement being performed less often than the first active measurement.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: April 7, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Vinay Sridhara, Rajarshi Gupta, Gengsheng Zhang
  • Patent number: 8995942
    Abstract: There is provided a radio communication device including a radio receiving unit to receive a radio signals, a synchronization unit to detect synchronization based on a result of a correlation for received signals output from the radio receiving unit, and a signal strength output unit to output, as signal strength of the received signals that is RSSI (Received Signal Strength Indicator) value, a level of a correlation signal that is output as a result of the correlation by the synchronization unit.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: March 31, 2015
    Assignee: Sony Corporation
    Inventor: Katsumi Watanabe
  • Patent number: 8965439
    Abstract: A method and system for obtaining an available white space channel for wireless communication using a white space device (WSD) are described. The WSD scans signals of TV transmitters, determines the received signal strength (RSSI) for those signals, and records TV data, including TV designations and corresponding RSSIs, for signals that exceed a predetermined threshold. The WSD sends TV data for at least three TV transmitters to an enhanced TV white space database (EnTVDB). The EnTVDB uses the TV data and information in its database to determine the geo-coordinates of the WSD. The EnTVDB uses the geo-coordinates of the WSD to identify available white space. The EnTVDB sends at least one channel of available white space to the white space device for its wireless communication.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: February 24, 2015
    Assignee: QUALCOMM Incorporated
    Inventor: Tevfik Yucek
  • Patent number: 8965398
    Abstract: Examples disclosed herein relate to utilizing Bluetooth beacons for location determination of a mobile device. A Wi-Fi signal scan and a Bluetooth beacon scan are initiated at the mobile device. A location of the mobile device is determined based on at least on at least one Bluetooth beacon detectable by the mobile device, where the at least one Bluetooth beacon is transmitted from a first location, and where the first location is the location of the mobile device. A user of the mobile device is prompted for location information input, in response to determining that no Bluetooth beacons are detectable by the mobile device or when the at least one Bluetooth beacon detected is determined to be transmitted from a second location different from the location of the mobile device.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: February 24, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jindan Zhu, Kai Zeng, Prasant Mohapatra, Kyu Han Kim
  • Patent number: 8948711
    Abstract: An apparatus and method determine a dielectric access in a portable terminal. The method includes generating a TX signal of a specific frequency band by performing frequency conversion, modulation, and digital/analog conversion. The method also includes detecting the power of the TX signal and converting the detected power using Analog-to-Digital Conversion (ADC). The method further includes loading an ADC table defining values for determining the approach/withdrawal of a dielectric to/from the portable terminal, and comparing the power of the TX signal and the ADC table to determine the approach/withdrawal of a dielectric to/from the portable terminal.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: February 3, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Chang-Kyun Kang
  • Patent number: 8934855
    Abstract: A base station for use in a mobile telephony network includes an antenna arrangement coupled to a transceiver arrangement for producing a plurality of beams. A method of testing the base station comprises detecting at the transceiver arrangement the signal strengths of a test signal received via the beams; comparing and/or correlating the said signal strengths detected at the transceiver arrangement; and using the results of the comparisons and/or correlations to determine the configuration of the antenna arrangement and transceiver arrangement and/or to detect faults. The comparison of average signal strengths can be used to detect cabling faults, and beam errors. The correlation of un-averaged signal strengths can be used to determine which beams have the same polarization. Beam pointing directions and the allocation of antennas to sectors can be determined by monitoring handovers of mobiles moving between cells. Frequencies may be allocated to sectors according to a frequency re-use scheme.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: January 13, 2015
    Assignee: Apple Inc.
    Inventors: Simon John Gale, Steven Raymond Hall, Andrew James Urquhart
  • Patent number: 8929843
    Abstract: An antenna power coupler having a variable coupling factor is disclosed. In an exemplary embodiment, an apparatus includes a coupler configured to generate a power detection signal based on transmit signal power associated with a plurality of transmission technologies and a variable attenuator configured to apply a selected attenuation factor to the power detection signal to generate an adjusted power detection signal, the selected attenuation factor associated with a selected transmission technology.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: January 6, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Prashanth Akula, David Maldonado, Kevin Hsi Huai Wang
  • Patent number: 8913969
    Abstract: The present disclosure relates to amplitude based pre-distortion calibration of an RF communications terminal, such as a cell phone, by transmitting a first standard RF transmit burst from the RF communications terminal to an RF test instrument, which assimilates the first standard RF transmit burst. A calibration control system extracts information regarding the first standard RF transmit burst from the RF test instrument; determines amplitude based distortion of the RF communications terminal using the extracted information; determines amplitude based pre-distortion calibration information using the determined amplitude based distortion; and calibrates the RF communications terminal using the amplitude based pre-distortion calibration information. By using a single-shot transmit burst, calibration times may be minimized.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: December 16, 2014
    Assignee: RF Micro Devices, Inc.
    Inventors: Hirofumi Honjo, Suryanarayana Pappu, Mikko Sannala, Ricke W. Clark
  • Patent number: 8903385
    Abstract: A wireless transmission device makes it possible to access the internet from a wireless LAN terminal, and notifies the state of wireless connection to a public wireless transmission network to the wireless LAN terminal, thereby alleviating uncertainty and disquiet on the part of the user when connecting to this network. The wireless transmission device detects the external network utilization information and notifies it to the wireless LAN terminal, and thereby the processing power of the wireless transmission device is enhanced, and uncertainty and disquiet on the part of the user when connecting to the public wireless transmission network are alleviated. If the wireless transmission terminal takes advantage of a mobile wireless transmission device for accessing the internet by using the public wireless transmission network, the communication burden which is imposed upon the public wireless transmission network is alleviated, and the internet access environment is enhanced.
    Type: Grant
    Filed: May 25, 2004
    Date of Patent: December 2, 2014
    Assignee: KYOCERA Corporation
    Inventor: Kugo Morita
  • Patent number: 8903364
    Abstract: Aspects of a method and system for processing and delivery of multimedia content by an integrated femtocell and set-top-box device are provided. In this regard, a cellular enabled communication device may communicate its capabilities, preferences, and/or settings to an integrated femtocell and set-top-box device, wherein the integrated femtocell and set-top-box device may processes multimedia content for the cellular enabled communication device based on the capabilities, preferences, and/or settings of the cellular enabled communication device. Additionally, the cellular enabled communication device may receive the processed multimedia content from the integrated femtocell and set-top-box device by the cellular enabled communication device. The capabilities, preferences, and/or settings may comprise multimedia processing capabilities, preferences, and/or settings, communication capabilities, preferences, and/or settings, and/or power conditions, preferences, and/or settings.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: December 2, 2014
    Assignee: Broadcom Corporation
    Inventors: Charles Abraham, Xuemin Sherman Chen, Wael William Diab, Vinko Erceg, Victor T. Hou, Jeyhan Karaoguz, Mark Kent
  • Patent number: 8903002
    Abstract: A computational processor uses a binary signal, being a set of 1- or 0-valued elements of a same number as a number of elements in an input signal, to generate computational data whose elements are exclusive OR values between each element of the input signal and a corresponding element in the binary signal at a same position. The modulator 13 modulates the input signal and the computational data according to a primary modulation scheme, and generates primary-modulated signals. An IFFT calculator applies an inverse fast Fourier transformation to the primary-modulated signals to generate inverse transformation data. A transmitter generates a baseband signal based on generated inverse transformation data whose peak-to-average power ratio matches a standard, and generates and transmits a transmission signal from the baseband signal and data specifying computations conducted to generate the inverse transformation data that matches the standard.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: December 2, 2014
    Assignee: Icom Incorporated
    Inventor: Nobuyoshi Nishikawa
  • Patent number: 8892061
    Abstract: Receipt of a radio broadcast signal by a mobile communication device is tracked based on a signal strength measurement signal and location information. The signal strength measurement signal indicate a signal strength of the radio broadcast signal, received via a communication channel and measured at the mobile communication device, over a particular time period. The location information indicates a location of the mobile communication device within a geographic area over the particular time period. Effectiveness of the radio broadcast signal is determined with respect to receipt of the radio broadcast signal by a plurality of mobile communication devices within the geographic area over the particular time period.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: November 18, 2014
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: James Gordon Beattie, Jr., Stephen J. Griesmer, Shiv Kumar
  • Patent number: 8886236
    Abstract: A method includes computing a minimum sensitivity threshold value for a particular wireless device, configuring the particular wireless device to receive wireless signals with a signal strength higher than the minimum sensitivity threshold value, distributing the minimum sensitivity threshold value to other wireless devices, and configuring the other wireless devices based on the minimum sensitivity threshold value for the particular wireless device.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: November 11, 2014
    Assignee: Aruba Networks, Inc.
    Inventor: Subburajan Ponnuswamy
  • Patent number: 8886129
    Abstract: The present invention relates to a method for reducing an average time period adopted at the time of evaluating an effect of electromagnetic fields of a mobile communication base station near the mobile communication base station on a human body and measurement is performed for 6 minutes at a predetermined measurement point for acquiring a whole body average by comparing a site measurement result targeting multiple base stations and uncertainty by repetitive measurement and when a 6-minute average value and an average value for a reduced time period which is shorter than 6 minutes are compared with each other, a standard deviation is equal to or lower than a predetermined level, e.g., 0.4 dB, it is sufficient even by the measurement for the reduced time period which is shorter than 6 minutes.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: November 11, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Byung Chan Kim, Je Hoon Yun, Chang Joo Kim
  • Patent number: 8880092
    Abstract: Multiple smart meters periodically measure strengths of detected signals generated by fixed position wireless devices. A centrally located location determining system receives this data, and correlates received strengths of the signals generated by the specific fixed position wireless devices with the physical locations of the measuring smart meters. Periodically, updated signal strengths are received, and stored correlations are replaced with updated correlations. Strengths of signals generated by fixed position wireless devices are received from a mobile computing device, as measured by the mobile device. The location determining system compares the signal strengths received from the mobile computing device to the most current strengths of signals of the same fixed position wireless devices, as measured by multiple smart meters, so as to perform triangulation and determine the physical location of the mobile device.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: November 4, 2014
    Assignee: Symantec Corporation
    Inventor: Shaun P. Cooley
  • Patent number: 8862076
    Abstract: There is provided a method of method of estimating a quality of a signal, the method in a first device comprising measuring a signal transmitted from a second device to a third device; determining a value of a metric from an autocorrelation function of the measured signal; and determining an estimate of the quality of the signal from the determined metric.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: October 14, 2014
    Assignee: Intel Corporation
    Inventor: Nicholas William Whinnett
  • Patent number: 8855182
    Abstract: In an emphasis optimization device, a calculating unit calculates an inverse characteristic of an amplitude characteristic based on the amplitude characteristic of a transmission path, and an inverse Fourier transform unit performs an inverse Fourier transform on the inverse characteristic to obtain an impulse response. An extracting unit extracts, from the obtained impulse response, an impulse response corresponding to the number of taps necessary for emphasis to be added to a digital signal to be transmitted on the transmission path. An emphasis amount calculating unit converts the extracted impulse response into a value of the emphasis to calculate an emphasis amount.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: October 7, 2014
    Assignee: Anritsu Corporation
    Inventors: Takashi Murakami, Kosuke Sasaki, Ken Mochizuki
  • Patent number: 8855650
    Abstract: A communication system in which a network side and a mobile station apparatus communicate with each other through a base station apparatus. In the mobile station apparatus, a position information acquisition device acquires the position information regarding the mobile station apparatus. At the network side, a network side quality information receiving device receives the data in which the position information transmitted from the mobile station apparatus and quality information regarding each cell are associated with each other. A network side quality information storage device stores the data received by the network side quality information receiving device or a result after processing the data.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: October 7, 2014
    Assignee: Hitachi Kokusai Electric Inc.
    Inventor: Takahito Ishii
  • Patent number: 8848827
    Abstract: A method of communicating a chirp signal from a transmitter suitable for receipt at a proximal receiver and a distal receiver, the chirp signal including a plurality of packets, each packet including at least one symbol, each symbol including one or more identical chirps, the method including: generating the chirp signal by interleaving constituent packets of: (i) a first set of packets encoded with first data, each packet including one or more symbols having a first time period t1, and (ii) a second set of packets encoded with second data, each packet including one or more symbols having a second time period t2, where t1<t2; and transmitting the generated chirp signal.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: September 30, 2014
    Assignee: Cambridge Silicon Radio Limited
    Inventor: Paul Dominic Hiscock
  • Patent number: 8837635
    Abstract: Embodiments provide systems and methods to dynamically control a radio frequency (RF) transmitter based on monitored error vector magnitude (EVM) performance. Embodiments are enabled by a feedback path that allows estimating the EVM at the output of the transmitter and controlling the transmitter, including the power amplifier (PA), accordingly. As such, the transmitter (and the PA) can be operated as close as possible to the ideal operating point that meets, based on actual conditions, a specified EVM performance and desired output power. By doing so, the overall power consumption of the transmitter is reduced.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: September 16, 2014
    Assignee: Broadcom Corporation
    Inventors: Robert Lorenz, Djordje Tujkovic
  • Patent number: 8838041
    Abstract: A first network device including a first calibration module to generate training signals for each of a plurality of subcarriers. The training signals are transmitted from the first network device to a second network device via antennas of the first network device using the subcarriers. A first steering module receives a first matrix for each subcarrier, which includes channel state information for each of the training signals received by the second network device, from the second network device according to a transmission schedule and generates a steering matrix based on the first matrix. The transmission schedule is predetermined or is transmitted to the second network device prior to transmitting the training signals. A first control module adjusts, based on the steering matrix, first beamforming weights associated with the antennas to direct first radio frequency signals to be transmitted toward the second network device.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: September 16, 2014
    Assignee: Marvell World Trade Ltd.
    Inventors: Rohit Nabar, Hui-Ling Lou
  • Patent number: 8831593
    Abstract: Certain aspects are directed to a configuration sub-system for telecommunication systems. The configuration sub-system can include a test signal generator, a power measurement device, at least one additional power measurement device, and a controller. The test signal generator can be integrated into components of a telecommunication system. The test signal generator can provide a test signal to a signal path of the telecommunication system. The power measurement device and the additional power measurement device can respectively be integrated into different components of the telecommunication system. The power measurement device and the additional power measurement device can respectively measure the power of the test signal at different measurement points in the signal path. The controller can normalize signals transmitted via the telecommunication system by adjusting a path gain for the signal path based on measurements from the power measurement device and the additional power measurement device.
    Type: Grant
    Filed: September 17, 2012
    Date of Patent: September 9, 2014
    Assignee: Andrew Wireless Systems GmbH
    Inventors: Matthew Thomas Melester, Stefan Eisenwinter, Ahmed H. Hmimy, Massimiliano Mini, Joerg Stefanik, Alfons Dussmann
  • Patent number: 8831138
    Abstract: The circuit is provided for the transmission of data amplitude modulated radio frequency signals. The circuit includes a local oscillator for generating an oscillating signal at a determined carrier frequency, a unit for shaping data pulses to supply a data amplitude modulation control signal (Vmod), and a power amplifier receiving the oscillating signal and the data amplitude modulation control signal (Vmod) for the transmission of data amplitude modulated radio frequency signals by an antenna or an antenna arrangement. The data pulse shaping unit (13) includes a pulse shaper (21) for digitally adapting the data transition edges on the basis of an incoming digital data signal (d), and a digital-analog conversion stage (26, 27) for converting a digital data signal shaped in the unit, in order to supply the data amplitude modulation control signal (Vmod) to the power amplifier.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: September 9, 2014
    Assignee: EM Microelectronic-Marin SA
    Inventor: Michel Moser
  • Patent number: 8831532
    Abstract: Methods and apparatuses to select a transmit antenna in a mobile wireless device connected to a wireless network are described. The mobile wireless device monitors received signal characteristics through first and second antennas and switches antennas based on the monitored signal characteristics and on an assessment of the sufficiency of available transmit power headroom to accommodate data transmissions in the uplink direction. Sufficiency is determined based on one or more criteria including achievable data rate throughput, quality of service, grade of service, an amount of data buffered, an amount of resources allocated by the wireless network and a number of “power up” commands received by the mobile wireless device during a pre-determined time interval.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: September 9, 2014
    Assignee: Apple Inc.
    Inventors: Gaurav R. Nukala, Venkatasubramanian Ramasamy
  • Patent number: 8824588
    Abstract: Systems, processes, and structures provide near-field transmit power measurement for MIMO wireless devices (DUT), such as for any of product development, product verification, and/or production testing. A test signal, such as comprising a pulse train signal, is provided to a MIMO device under test (DUT), wherein portions of the test signal controllably steered and sequentially transmitted from each of the device antennas, to one or more test antennas that are positioned in close proximity to the MIMO DUT. The near-field power of the received test signals is measured, to quickly and efficiently determine if one or more data streams of the MIMO DUT has a problem.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: September 2, 2014
    Assignee: Netgear, Inc.
    Inventors: Joseph Amalan Arul Emmanuel, Jonathan M. Hummel
  • Patent number: 8818305
    Abstract: A method and system controls a transition between utilizing an envelope tracking (ET) mechanism and using an average power tracking (APT) mechanism to provide power to a power amplifier. A power amplifier controller (PAC) initiates an ET mechanism to track changes in amplitudes of a radio frequency (RF) signal being received by the power amplifier. If the PAC determines that the RF signal bandwidth is low and the average amplitude is at least equal to a threshold value, the PAC maintains the ET mechanism. If the RF signal bandwidth is high and/or the average amplitude of the RF signal is less than the threshold value, the PAC temporarily deactivates the ET mechanism and controls a transition to utilizing the APT mechanism by properly synchronizing the transition to the change in average signal amplitude levels so there are no undesired transients affecting signal quality or spectrum.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: August 26, 2014
    Assignee: Motorola Mobility LLC
    Inventors: Dale G. Schwent, Gregory R. Black, Ryan J. Goedken, Armin W. Klomsdorf
  • Patent number: 8804873
    Abstract: A communication system (20) includes a transmitter (22) having a peak controller (38) which controls PAPR to operate in accordance with a noise constraint. A backoff controller (60) operates in conjunction with an amplifier section (46) to cause the amplifier section (46) to maximize the amplification it applies while maintaining a predetermined degree of amplifier linearity. The noise constraint is provided by an equilibrium estimator (64) that provides a noise target parameter (66) to the peak controller (38). The noise target parameter (66) is configured to identify the transmitter's equilibrium point (126). The equilibrium point (126) is that signal-to-noise ratio (SNR) for the signal (26) broadcast from the transmitter (22) where a demodulator (118) in a receiver (24) will experience a reduced SNR if the transmitted signal (26) SNR either increases or decreases.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: August 12, 2014
    Assignee: CrestCom, Inc.
    Inventor: Ronald Duane McCallister
  • Patent number: 8798198
    Abstract: A calibration system may be provided for calibrating wireless communications circuitry in an electronic device during manufacturing. The calibration system may include data acquisition equipment for receiving an amplitude-modulated calibration signal from the electronic device. The calibration system may include calibration computing equipment for extracting pre-distortion coefficients from the amplitude-modulated calibration signal. The calibration computing equipment may be configured to detect a bulk phase drift in the amplitude-modulated calibration signal. The calibration computing equipment may be configured to remove the bulk phase drift from the amplitude-modulated calibration signal. The wireless communications circuitry may include a power amplifier that distorts a signal generated by the wireless communications circuitry. The wireless communications circuitry may include a pre-distortion compensator for countering the distortion.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: August 5, 2014
    Assignee: Apple Inc.
    Inventor: Gary Lang Do
  • Patent number: 8797889
    Abstract: A radio base station transmits data symbols to a mobile terminal on multiple frequency carriers, e.g., in accordance with the MC-WCDMA or cmda2000 3x air interface protocols. The radio base station instructs the mobile terminal to report channel quality measurements obtained by the terminal for the multiple carriers over the same uplink channel during successive reporting intervals. According to one embodiment, the mobile terminal reports channel quality by receiving data symbols transmitted on a plurality of frequency carriers in a multi-carrier CDMA environment and measuring channel quality for the different frequency carriers. The mobile terminal reports individual ones of the channel quality measurements over the same uplink channel during successive reporting intervals.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: August 5, 2014
    Assignee: Telefonaktiebolaget LML Ericsson (Publ)
    Inventors: Stefan Parkvall, Erik Dahlman, Bo Göransson, Joakim Bergström
  • Patent number: 8781416
    Abstract: A processor determines, from signals received from other communication devices, one selected transmission mode for the communication channel conditions. The processor projects multiple channel characterization parameters in a mathematical model to each of the candidate transmission modes using a model of nominal communication channel conditions to predict whether each of the candidate transmission modes will achieve the desired communication under the nominal communication channel conditions. This results in the generation of a first subset of transmission modes. The processor also projects the multiple channel characterization parameters to each of the candidate transmission modes using a model of degraded communication channel conditions to predict whether each of the candidate transmission modes will achieve the desired communication under the degraded communication channel conditions.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: July 15, 2014
    Assignee: Rockwell Collins, Inc.
    Inventors: Stephen M. Clark, Ray L. Cross