By Signal Strength Patents (Class 455/134)
  • Patent number: 10224899
    Abstract: A high-frequency filter includes a variable frequency filter, a fixed frequency filter, and switches. The variable frequency filter varies a passband in association with frequencies used in multiple communication band. The fixed frequency filter fixes a passband in association with a frequency used in a specific communication band different from the multiple communication bands. The switches are used to switch connection configuration to the variable frequency filter or the fixed frequency filter.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: March 5, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Hideki Tsukamoto
  • Patent number: 10204115
    Abstract: A terminal supporting apparatus 10 supports at least one of two ends of a control cable having an inner cable and an outer cable. The terminal supporting apparatus 10 includes: a hub 12 attached to an end of the outer cable, and having a flange on an outer periphery thereof; a cushion member 14 disposed to surround the outer periphery of the hub, and being in contact with the flange at both a front surface and a rear surface of the flange; and a housing 17 having a housing part that houses the cushion member. When an angle formed between an axis of the housing part and an axis of the hub is varied in a range of 0.0° to 6.0°, a diagonal static spring constant of the cushion member in an axial direction thereof may be in a range of 350 to 600 N/mm.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: February 12, 2019
    Assignee: Arm Limited
    Inventor: Simon Edwards
  • Patent number: 9906247
    Abstract: A method and a circuit are arranged for adapting a first reference value for generating a first bit stream from an input signal by a first amplitude adapting unit. The input signal comprises a first and a second signal. The first signal and the second signal form a baseband sum signal. A first non-linear component demodulates the input signal and outputs a demodulated input signal. The amplitude adapting unit outputs the first bit stream from the demodulated input signal on the basis of a first reference value. A reference-value adapting unit comprises a detection unit which detects the first and the second signal. Upon discontinuation of the first and second signals, an adjusting unit adjusts the first reference value to a basic reference value.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: February 27, 2018
    Assignee: GIESECKE+DEVRIENT MOBILE SECURITY GMBH
    Inventors: Klaus Finkenzeller, Florian Pfeiffer
  • Patent number: 9900417
    Abstract: An enclosure for use in a vehicle having an ignition system, for securely holding an electronic device and rendering it inaccessible during operation of the vehicle. The enclosure has a main part and a door. The door has an open position and a closed position and includes a device cradle for holding the electronic device. A device responsive switch is closed when the electronic device is located within the device cradle, and a door responsive switch is closed when the door is in the closed position. When the ignition is on, the door responsive switch and device responsive switch must both be closed for the vehicle to operate. A locking assembly holds the door in the closed position and is activated while the vehicle is in operation to physically prevent access to the electronic device while the vehicle is in operation.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: February 20, 2018
    Inventor: Steve Ruiz
  • Patent number: 9877295
    Abstract: A method and apparatus for recording information from a plurality of mobile devices in an area, the method comprising listening for data packets from the plurality of mobile devices in a predetermined time period, creating a record for containing addresses and signal strength readings associated with the plurality of mobile devices, determining whether a data packet received during the predetermined time period is from a mobile device of the plurality of mobile devices, determining whether an address associated with the mobile device is recorded in the record, updating the record with the address and a signal strength reading associated with the mobile device, and updating the signal strength reading associated with the mobile device updating the record depending upon the number of times the record has been updated with a signal strength reading associated with the mobile device during the predetermined time period.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: January 23, 2018
    Assignee: Ruckus Wireless, Inc.
    Inventors: Yang Han, Shao Pin Hoo, Jiesheng Jason Cheow, Choong Yong Koh, See Ho Ting
  • Patent number: 9825688
    Abstract: An audio device capable of intelligently switching between multiple antennas is provided. The audio device receives a wireless signal by a default receiving antenna, determines signal quality metrics of the wireless signal received by various antennas, compares the signal quality metrics of the wireless signal received by the various antennas, and selects a receiving antenna from the various antennas to receive the wireless signal based on the comparison of the signal quality metrics of the wireless signal received by the various antennas.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: November 21, 2017
    Assignee: BOSE CORPORATION
    Inventors: Louis Gwo-Chung Chen, Naganagouda Patil
  • Patent number: 9819368
    Abstract: A system and method integrates signal filters in a multiband transceiver. A preferred embodiment comprises an amplifier with a first tunable capacitor coupled to a signal input and a tunable filter. The tunable filter comprises an input stage with a first pair of inductors arranged in a dipole configuration and a second tunable capacitor coupled in parallel to the first pair of inductors and an output stage inductively coupled to the input stage, the output stage includes a second pair of inductors also arranged in a dipole configuration and a third tunable capacitor coupled in parallel to the second pair of inductors. The inductors are realized using bond wire or any other high Q material. The first tunable capacitor, the second tunable capacitor, and the third tunable capacitor can be tuned using a master-slave tuning configuration to adjust the operating frequency of the amplifier and the tunable filter to enable frequency band compatibility with multiple communications protocols.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: November 14, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Naveen Krishna Yanduru, Gregory Eric Howard, Danielle Griffith, Srinivasan Venkatraman
  • Patent number: 9772377
    Abstract: A circuit division method for test pattern generation in which a computer performs processes of: acquiring, for each of a plurality of blocks included in a target circuit for test pattern generation, a first feature amount regarding a size of each block and a second feature amount regarding a function of the block; classifying the plurality of blocks into a plurality of groups so that blocks for which the acquired first feature amount is within a first predetermined range and the acquired second feature amount is within a second predetermined range belong to an identical group; and assigning, for each of the classified groups, each of the blocks included in the group to one of a plurality of divided circuits of a division number based on a ratio of the number of blocks included in the group to the division number by which the plurality of blocks are divided.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: September 26, 2017
    Assignee: FUJITSU LIMITED
    Inventor: Daisuke Maruyama
  • Patent number: 9363005
    Abstract: Electronic devices may be provided that contain wireless communications circuitry. The wireless communications circuitry may include radio-frequency transceiver circuitry with first and second ports that are coupled by switching circuitry to first and second antennas. A first receiver in the transceiver circuitry may be associated with the first port and a second receiver in the transceiver circuitry may be associated with the second port. An electronic device may be operated in a single receiver mode in which only one of the receivers is active to conserve power or a dual receiver mode in which signals from both antennas may be received in parallel to compare antenna performance. Based on antenna performance metrics, the electronic device may adjust the switching circuitry to ensure that an optimal antenna is being used.
    Type: Grant
    Filed: November 5, 2010
    Date of Patent: June 7, 2016
    Assignee: Apple Inc.
    Inventors: Isabel G. Mahe, Jianxiong Shi, Kee-Bong Song, Ming Hu, William S. Burchill, Syed A. Mujtaba, Johnson O. Sebeni, Haining Zhang
  • Patent number: 9295069
    Abstract: Methods, devices, and systems embodiments enable a multi-antenna mobile device to mitigate radio frequency (RF) radiation exposure to users. A processor may determine a distance between the multi-antenna mobile device and the select portion of the user and switch from using a first antenna that is closer to the select portion of the user to using a second antenna when the multi-antenna mobile device is close to the user. The signal strength of the first antenna may be compared to the signal strength of a second antenna of the multi-antenna mobile device, and the second antenna may be used instead of the first antenna when the signal strength of the first antenna is within a predetermined threshold of the signal strength of the second antenna. If acceptable signal quality is not obtained with the second antenna, the multi-antenna mobile device may switch back to the first antenna.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: March 22, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Anand Krishna Puranik, Debesh Kumar Sahu, Venkata Siva Prasad Rao Gude, Tushar Gupta
  • Patent number: 9203453
    Abstract: A system and method for receiving signals using a receiver with antenna switching capability is provided. The receiver is configured to poll each antenna of the plurality of antennas and process the signals from each antenna. In addition, the receiver coordinates providing power to each antenna with the polling.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: December 1, 2015
    Assignee: Continental Automotive Systems, Inc.
    Inventors: Brian Farrell, Jean-Christophe Deniau, John R. Costello
  • Patent number: 9112569
    Abstract: Embodiments include a novel receiver architecture to optimize receiver performance in the presence of interference. In various embodiments, the presence of interference is detected, and the relative frequency location of the interference is detected. The relative frequency location specifies whether the frequency of the interference is high side (above the desired signal, i.e., at a higher frequency) or low side (below the desired signal). The receiver is configured based on the detected interference and relative location thereof. For a device such as a cellular phone that operates in a dynamic and changing environment where interference is variable, embodiments advantageously provide the capability to modify the receiver's operational state depending on the interference.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: August 18, 2015
    Assignee: Spreadtrum Communications USA Inc.
    Inventors: David Haub, Zhigang Xu, Jarrett Malone
  • Patent number: 9026141
    Abstract: A controlling device such as a remote control has programming for transmitting a signal response to a plurality of control environments, each environment including a signaling device. Each signaling device in receipt of the signal request sends a signal response having a unique ID which is chosen to be characteristically attenuated by the surroundings of the environment. Because the controlling device can only be in one environment at a given time, and given the attenuation characteristics of the signal response from each signaling device, only one signal response will be received by the controlling device in each environment. Location definitions associated with the received unique ID may be used by programming in the controlling device to recall saved devices states, commands sets, macros, and even to dynamically generate commands based on the location information.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: May 5, 2015
    Assignee: Universal Electronics Inc.
    Inventors: Stephan de Clercq, Christopher A. Chambers, Wayne Scott, Allen Yuh, Paul D. Arling, Robert Lilleness
  • Patent number: 8965285
    Abstract: A system for expediting wireless connection establishment between wireless-enabled apparatuses. In at least one example implementation an apparatus may transmit discovery messages for discovering other apparatuses. The apparatus may receive one or more messages responding to the discovery message, and may determine whether any of the received responses satisfy a predetermined response criteria. If the apparatus determines that any of the received messages satisfy the response criteria, wireless connection establishment may be expedited between the apparatus and a source apparatus for each of the received messages that satisfy the response criteria. In an alternative scenario where a touch mode may be active in an apparatus that receives a message from at least one other apparatus, the apparatus may determine whether the message satisfies a predetermined criteria. If the message is determined to satisfy the criteria, the apparatus may expedite wireless connection establishment to the other apparatus.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: February 24, 2015
    Assignee: Nokia Corporation
    Inventors: Arto Palin, Jukka Reunamäki
  • Patent number: 8942726
    Abstract: A controlling device such as a remote control has programming for transmitting a signal response to a plurality of control environments, each environment including a signaling device. Each signaling device in receipt of the signal request sends a signal response having a unique ID which is chosen to be characteristically attenuated by the surroundings of the environment. Because the controlling device can only be in one environment at a given time, and given the attenuation characteristics of the signal response from each signaling device, only one signal response will be received by the controlling device in each environment. Location definitions associated with the received unique ID may be used by programming in the controlling device to recall saved devices states, commands sets, macros, and even to dynamically generate commands based on the location information.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: January 27, 2015
    Assignee: Universal Electronics Inc.
    Inventors: Stephan de Clercq, Christopher A. Chambers, Wayne Scott, Allen Yuh, Paul D. Arling, Robert Lilleness
  • Patent number: 8929816
    Abstract: A system for expediting connection establishment between apparatuses. In at least one example implementation, an apparatus may transmit discovery messages and may receive response messages. If any of the response messages are determined to satisfy predetermined response criteria, the apparatus may further determine if any of these response messages (e.g., the messages that were determined to satisfy the predetermined response criteria) are associated with apparatuses that satisfy selection criteria for the selection of multiple apparatuses that may, in some instances, operate together as a group. Apparatuses that are determined to satisfy the multiple selection criteria may then be selected, wherein connection establishment is expedited for the selected apparatuses.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: January 6, 2015
    Assignee: Nokia Corporation
    Inventors: Arto Palin, Jari Nikara
  • Patent number: 8929817
    Abstract: A system for selectively expediting connection establishment between apparatuses. In accordance with at least one embodiment of the present invention, an apparatus may sense a first change in the disposition of the apparatus, and may initiate device discovery based on the first sensed change. A determination may then be made in the apparatus as to whether another apparatus encountered by the apparatus during device discovery satisfies a predetermined response criteria. The apparatus may then select the other apparatus if it is determined that the other apparatus satisfies the predetermined response criteria.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: January 6, 2015
    Assignee: Nokia Corporation
    Inventors: Arto Palin, Jukka Reunamäki
  • Patent number: 8909167
    Abstract: A wireless communication device comprises a first antenna, a second antenna, a switch, and a balun. The first antenna and the second antenna transmit and receive signals. The wireless communication device can use only one antenna (the first antenna) or the two antennas (the first antenna and the second antenna) at the same time according to a comparison between received signal strength indications (RSSIs) of the antennas and a maximum input level of the wireless communication device.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: December 9, 2014
    Assignees: Ambit Microsystems (Shanghai) Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Al-Ning Song, Guo-Hui Peng
  • Patent number: 8909308
    Abstract: Antenna swapping methods for a wireless electronic device may include refraining from swapping antennas of the wireless electronic device for wireless communication with a network other than during a time period that is received at the wireless electronic device from the network. Related systems and devices are also described.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: December 9, 2014
    Assignees: Sony Corporation, Sony Mobile Communications AB
    Inventors: Rickard Ljung, Erik Bengtsson, Thomas Bolin, Peter Karlsson, Zhinong Ying
  • 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: 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: 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: 8841989
    Abstract: An electronic messaging device includes a receiver configured to receive a message at one of a first operational frequency and second operational frequency. The messaging device can operate using a time synchronous protocol and can receive commands through over-the-internet-programming (OTIP) and over-the-air-programming (OTAP).
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: September 23, 2014
    Assignee: American Messaging Services, LLC
    Inventors: John F. Nagel, J. Roy Pottle, Peter C. Barnett, David Andersen, Jamie Gordon Nichol, Sangsoo Kim
  • Patent number: 8824986
    Abstract: The invention relates to a multichannel radio-frequency receiver (1) for electromagnetic waves, having a radio-frequency analogue section (2) which has an input (3) for an electrical signal of a receiving device (4), and having an lower-frequency section (8, 9) which is connected downstream from the radio-frequency analogue section (2) and has a plurality of parallel channels (6b, 6c; 7b, 7c) for respectively different signal strengths and an evaluation circuit, in which a signal divider (5) is provided in the radio-frequency analogue section (2) in order to split the signal in accordance with a predeterminable division ratio into signal elements which can be supplied to radio-frequency analogue channels (6a, 7a), downstream from which the channels (6b, 6c; 7b, 7c) of the lower-frequency section (8, 9) are respectively connected, and the channels (6b, 6c; 7b, 7c) of the lower-frequency section (8, 9) each have an evaluation circuit for detection of the phase and amplitude of the respective signal element.
    Type: Grant
    Filed: July 13, 2006
    Date of Patent: September 2, 2014
    Assignee: Selex ES GmbH
    Inventors: Frank Gekat, Dieter Rühl
  • Patent number: 8818316
    Abstract: The present invention is a system for increasing Signal-to-Noise Ratio (SNR) in a wireless communication system comprising a plurality of antennas each antenna providing a signal, a device for selecting a subset of signals provided by the plurality of antennas, a maximum ratio combiner for summing the selected subset of signals provided by the plurality of antennas, and a decision device for measuring the selected subset of signals against a predefined threshold. The device for selecting the subset of signals is coupled to the plurality of antennas. The maximum ratio combiner is coupled to the selected subset of signals and the decision device for measuring the selected subset of signals against a predefined threshold. The decision device is coupled to the selecting device such that one selected signal of the selected subset of signals is replaced by an unused signal provided by the plurality of antennas.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: August 26, 2014
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Saeed S. Ghassemzadeh, Richard Henry Erving, Robert Raymond Miller, II, Christopher W. Rice
  • 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
  • Patent number: 8798552
    Abstract: A reconfigurable wireless transceiver and method of use are disclosed. As one example, a reconfigurable wireless transceiver is disclosed, which includes a transmitter unit, a plurality of receiver units, and a processing unit coupled to the plurality of receiver units. A first receiver unit of the plurality of receiver units receives a first signal at a first frequency, and determines a strength level of the first signal. A second receiver unit of the plurality of receiver units searches for a second signal at a second frequency, detects the second signal at the second frequency, and determines a strength level of the detected second signal. The processing unit determines if the strength level of the detected second signal is greater than a predetermined value, and enables the second receiver unit to receive a third signal at substantially the second frequency, if the strength level of the detected second signal is greater than the predetermined value.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: August 5, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Michael Brobston, Seong Eun Kim, Lup Meng Loh
  • Patent number: 8787838
    Abstract: The suitability of a fixed or current mobile operating location for the receiver (19) in a data memory (13, 15) for picking up the consumption data (12) transmitted by a data radio channel in a wireless local data capture system (11) from consumption points (14) to a data memory (13, 15) can easily and reliably be qualitatively assessed in situ or for the purpose of remote diagnosis by virtue of a channel scan being initiated and the memory receiver (17) performing an RSSI measurement, which is preferably presented as a histogram (20) against current channel use. This renders permanent sources of interference and link budget problems in the data radio (particularly UHF) channel and also temporary sources of interference and collision problems in this channel identifiable and thereby avoids costly receiver location changes, without use of radio-specific specialist personnel, after a site has previously been selected for the receiver installation only empirically but inexpediently.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: July 22, 2014
    Assignee: Diehl Metering Systems GmbH
    Inventors: Thomas Kauppert, Klaus Gottschalk, Thomas Uhlmann
  • Patent number: 8781397
    Abstract: A method for initiating a security relationship by a first communication device, wherein the first device communicates with a number of other communication devices, selects, in dependence on the result of the communicating step, one of the other devices, and initiates the negotiation of a security relationship with that selected device.
    Type: Grant
    Filed: May 15, 2010
    Date of Patent: July 15, 2014
    Assignee: Cambridge Silicon Radio Limited
    Inventor: Jon Sole
  • Patent number: 8761704
    Abstract: A broad band packet radio communication system is characterized by the carrier sense multiplexing connection method operated on a harsh frequency arrangement where an occupied band width of a modulation transmission/reception wave and a modulation side lobe are wide and the frequency channel interval is narrow. It is possible to improve the reception adjacent channel interference characteristic among a plurality of terminals belonging to the respective cells existing in the vicinity of adjacent frequency cell boundary area. The RSSI system is subjected to a narrow-band channel filtering (a narrow-band filter (BPF or LPF) having a band narrower than one-channel occupied band width) while the reception/demodulation system is subjected to a wide-band channel filtering (a wide-band filter (BPF or LPF) having a pass band equal to or wider than the one-channel occupied band width).
    Type: Grant
    Filed: May 26, 2003
    Date of Patent: June 24, 2014
    Assignee: NEC Corporation
    Inventor: Takuji Mochizuki
  • Patent number: 8744394
    Abstract: A system including a diversity module and an antenna selection module. The diversity module is configured to measure (i) a first signal-to-noise ratio and a first error rate associated with a first antenna, and (ii) a second signal-to-noise ratio and a second error rate associated with a second antenna. The antenna selection module is configured to select the first antenna or the second antenna by comparing (i) the first signal-to-noise ratio to the second signal-to-noise ratio, and (ii) the first error rate to the second error rate.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: June 3, 2014
    Assignee: Marvell International Ltd.
    Inventors: Milind Kopikare, Brian Bosso, Partho Mishra
  • Patent number: 8724748
    Abstract: A wireless communication terminal includes an antenna selecting unit that selects, for each packet, an antenna for use in receiving signals from among a plurality of a plurality of antennas; a packet-destination judging unit that judges whether a packet obtained by demodulating a signal received by the receiving antenna selected by the antenna selecting unit is destined for the wireless communication terminal; and a stand-by-antenna determining unit that determines a stand-by antenna for use in receiving a packet to be received next based on a result of selection made by the antenna selecting unit and a result of judgment made by the packet-destination judging unit.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: May 13, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Mayuko Ueno, Syuji Kubota
  • Patent number: 8712352
    Abstract: A controlling device such as a remote control has programming for transmitting a signal response to a plurality of control environments, each environment including a signaling device. Each signaling device in receipt of the signal request sends a signal response having a unique ID which is chosen to be characteristically attenuated by the surroundings of the environment. Because the controlling device can only be in one environment at a given time, and given the attenuation characteristics of the signal response from each signaling device, only one signal response will be received by the controlling device in each environment. Location definitions associated with the received unique ID may be used by programming in the controlling device to recall saved devices states, commands sets, macros, and even to dynamically generate commands based on the location information.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: April 29, 2014
    Assignee: Universal Electronics Inc.
    Inventors: Stephan de Clerq, Christopher Chambers, Wayne Scott, Allen Yuh, Paul D. Arling, Robert Lilleness
  • Patent number: 8699605
    Abstract: A receiving method and apparatus in a Multiple-Input Multiple-Output (MIMO) communication system are provided. The method includes receiving reception signals through a plurality of reception antennas, grouping symbols corresponding to the reception signals, respectively, into a preset number of groups, and rearranging symbols of the respective groups, transforming the reception signals by applying QR decomposition to the reception signals, sequentially canceling interference due to each of total possible candidate symbols for a first symbol based on an order of the rearranged symbols in the transformed reception signals, determining a portion of the total possible candidate symbols to be a candidate symbol set for each remaining symbol, except for the first symbol, using the interference-canceled reception signal, and determining log-likelihood ratio values of the first symbol, which are to be used upon decoding the received signals, using candidate symbols for the first symbol and each remaining symbol.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: April 15, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Joo-Yeol Yang
  • Patent number: 8699528
    Abstract: A method for communication includes receiving in a receiver signals, which include one or more dedicated reference signals, that are transmitted from a transmitter over a communication channel in multiple blocks. The signals in each block, including the dedicated reference signals, are transmitted on a respective group of subcarriers over a respective time interval and are precoded using a respective precoding scheme that maps the signals onto multiple antenna ports of the transmitter. Based on the received signals, feedback is computed in the receiver with respect to the communication channel in each of multiple spectral sub-bands, and the feedback for the multiple spectral sub-bands is reported to the transmitter. One or more parameters of the communication channel are estimated jointly over the dedicated reference signals included in each of the spectral sub-bands for which the feedback is reported. The signals are decoded based on the estimated parameters.
    Type: Grant
    Filed: January 4, 2011
    Date of Patent: April 15, 2014
    Assignee: Marvell World Trade Ltd.
    Inventors: Adoram Erell, Daniel Yellin
  • Patent number: 8681887
    Abstract: A system and method for estimating a channel in a wireless receiver is disclosed. The method comprises receiving a block of “n” transmitted symbols, the symbols including pilot symbols and “d” data symbols, estimating a channel using the pilot symbols to create a channel estimate, choosing a group of “m” strongest symbols from the “d” received symbols, compensating the “m” strongest symbols using the channel estimate to create a group of “m” compensated symbols, re-estimating the channel using the group of “m” compensated symbols and pilot symbols; and either (1) repeating the steps of choosing a group of “m” strongest symbols, compensating the group of “m” strongest symbols and re-estimating the channel, or (2) using a latest channel estimate to compensate all symbols within the block. The system comprises a wireless receiver having an estimator programmed according to the method.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: March 25, 2014
    Assignee: AT&T Mobility II LLC
    Inventors: Titus Lo, Ruifeng Wang
  • Patent number: 8676130
    Abstract: The described embodiments relate generally to methods, systems and computing devices, including at least a mobile device, for ordering a discovered device list according to a Received Signal Strength Indication (RSSI) of each device in the discovered device list. Thus, the discovered device list has at the top of the list the device that has the highest RSSI, with the remaining devices in the discovered device list presented in descending order of RSSI.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: March 18, 2014
    Assignee: BlackBerry Limited
    Inventors: Sean Elliott Wilson, Christopher Pattenden
  • Patent number: 8676141
    Abstract: A power control method in a mobile station having at least two antennas. The mobile station operates in a receive-diversity state in which the mobile station wirelessly receives communications with multiple antennas. The mobile station determines a relative gain of operating in the receive-diversity state versus operating in a non-receive-diversity state in which the mobile station wirelessly receives communications with one antenna rather than with multiple antennas. The mobile station uses the determined gain as a basis to set one or more power characteristic(s). The one or more power characteristic(s) may include (i) an initial power control setpoint for use by the mobile station to evaluate strength of received transmissions and (ii) an initial power level at which a remote entity transmits to the mobile station.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: March 18, 2014
    Assignee: Sprint Spectrum L.P.
    Inventor: Sachin R. Vargantwar
  • Patent number: 8670736
    Abstract: A circuit includes, in part, a receiver, a received signal strength indicator (RSSI), and an oscillator. The receiver receives an incoming signal and an oscillating signal. The RSSI is responsive to the receiver and generates an output signal representative of the strength of the incoming signal. The oscillator receives different biasing conditions in response to different outputs of the RSSI. The oscillator generates the oscillating signal received by the receiver. The oscillator receives a first biasing condition when the incoming signal is detected as having a strength lower than or equal to a predetermined threshold value and a second biasing condition when the incoming signal is detected as having a strength higher than the predetermined threshold value. The first biasing condition may be defined by a first current, and the second biasing condition may be defined by a sum of the first current and a second current.
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: March 11, 2014
    Assignee: MaxLinear, Inc.
    Inventor: Sheng Ye
  • Patent number: 8665993
    Abstract: Methods are disclosed for transmitting a plurality of information bits using resource selection on multiple antennas. In one or more embodiments, the methods include: selecting a first and a second orthogonal resource from an allocation of more than two orthogonal resources according to the state of the plurality of information bits; transmitting a first symbol in a first symbol instant on a first antenna using the first orthogonal resource; and transmitting a second symbol in the first symbol instant on a second antenna using the second orthogonal resource. In some embodiments, the first and second orthogonal resources are different and the first symbol is either a reference symbol or a modulation symbol.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: March 4, 2014
    Assignee: BlackBerry Limited
    Inventors: Masoud Ebrahimi Tazeh Mahalleh, Robert Mark Harrison, Youn Hyoung Heo, Yongkang Jia
  • Patent number: 8666350
    Abstract: A circuit includes, an attenuator responsive to an input signal and a feedback signal, a variable gain low-noise amplifier responsive to the attenuator and to the feedback signal, a tracking filter, a frequency converter, and an RSSI responsive to the variable gain amplifier to generate an output signal to which the feedback signal is responsive. The frequency converter may be a mixer having a single-ended input and a differential output. The circuit may further include an analog baseband block responsive to the mixer to filter out high frequency signals. The tracking tuner performs bandpass filtering operation on the output signals of the variable gain low-noise amplifier.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: March 4, 2014
    Assignee: MaxLinear, Inc.
    Inventor: Ari Vauhkonen
  • Patent number: 8655651
    Abstract: The invention relates to a method, computer, computer program and computer program product for speech quality estimation. The method comprises the steps of: determining a coding distortion parameter (QCOD), a bandwidth related distortion parameter (BW) and a presentation level distortion parameter (PL) of a speech signal; extracting a first coefficient (?l) and a second coefficient (?2), the first coefficient and the second coefficient being dependent on the coding distortion parameter; and calculating a signal quality measure (Q), where the signal quality measure is QCOD+?1BW+?2PL using the signal quality measure in a quality estimation of the speech signal.
    Type: Grant
    Filed: July 26, 2010
    Date of Patent: February 18, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Volodya Grancharov, Mats Folkesson
  • Patent number: 8634792
    Abstract: An RF receiver section includes an adjustable antenna assembly, a low noise amplifier module, and a down conversion module. The adjustable antenna assembly is configured to provide a first receive antenna structure and a second receive antenna structure. The first and second receive antenna structures receive an inbound wide bandwidth RF signal that includes an interferer RF signal component and a desired inbound RF signal component. The effective polarization of at least one of the first and second receive antenna structures is adjusted to reduce signal strength of the interferer RF signal component.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: January 21, 2014
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza (Reza) Rofougaran, Maryam Rofougaran
  • Patent number: 8632457
    Abstract: An object of the invention is to receive, with a high sensitivity, a radio signal transmitted within a short time before a capsule endoscope reaches the stomach of a subject and acquire, in a satisfactory state, information on the interior of the subject such as image data picked up by the capsule endoscope. The receiving apparatus according to the invention includes a plurality of receiving antennas including a specified receiving antenna for receiving a radio signal from a capsule endoscope before the stomach is reached, a switching controller, an arrival determining unit and a mode switching unit. The switching controller performs a control operation for switching to and maintaining the receiving antenna in an initial mode or a control operation for switching to the receiving antennas in a normal mode. The arrival determining unit determines whether the capsule endoscope has reached the stomach or not.
    Type: Grant
    Filed: October 19, 2006
    Date of Patent: January 21, 2014
    Assignee: Olympus Corporation
    Inventors: Ayako Nagase, Seiichiro Kimoto, Manabu Fujita, Toshiaki Shigemori, Akira Matsui, Kazutaka Nakatsuchi
  • Patent number: 8615213
    Abstract: In one embodiment, the present invention includes a system that having a low noise amplifier (LNA) to receive and amplify a radio frequency (RF) signal, a mixer to receive and downconvert the RF signal to a second frequency signal, a filter to receive and filter the second frequency signal, a demodulator to receive and demodulate the filtered second frequency signal to output demodulated data, and a quality detector to detect a quality of the demodulated data and output a quality indicator based on the data quality. In addition, the system can include a controller coupled to the filter to cause a state of the filter to be stored into a storage responsive to the quality indicator.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: December 24, 2013
    Assignee: Silicon Laboratories Inc.
    Inventors: Hendricus De Ruijter, Ping Xiong
  • Patent number: 8611838
    Abstract: An HD radio receiver includes a storage unit for carrying out tuning at a time when autostore is activated and for storing broadcasting station data about a terrestrial digital radio broadcast received by the tuning, a reception quality detecting unit for detecting reception quality of the radio broadcast received, and a control unit for deciding the number of broadcast programs of multicasting that broadcasts a plurality of programs on a single frequency from the terrestrial digital radio broadcast received and for registering in the storage unit broadcasting station data with a greater number of decided broadcast programs in preference to broadcasting station data with better reception quality detected by the reception quality detecting unit.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: December 17, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventor: Yozo Kanayama
  • Patent number: 8594697
    Abstract: A technique for determining a received signal strength from multiple messages filters noise from the received signal to provide an accurate signal strength value. Advantageously, the more accurate output signal strength value can be used to identify movement of a station as well as estimate locations and direction of movement.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: November 26, 2013
    Assignee: Trapeze Networks, Inc.
    Inventor: David B. Aragon
  • Patent number: 8594606
    Abstract: A technique for determining a received signal strength from multiple messages filters noise from the received signal to provide an accurate signal strength value. Advantageously, the more accurate output signal strength value can be used to identify movement of a station as well as estimate locations and direction of movement.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: November 26, 2013
    Assignee: Trapeze Networks, Inc.
    Inventor: David B. Aragon
  • Patent number: 8594598
    Abstract: A method for processing signals in a receiver includes receiving a plurality of wireless signals via a plurality of M receive antennas coupled to M corresponding signal amplifiers. The method may also include measuring corresponding signal strengths of M signals generated when each of M phase-shifters is coupled to each of the M receive antennas, while one or more of the M signal amplifiers are disabled. One of the M generated signals may be selected for processing without the use of an antenna switch, where the selecting may be based on the measured signal strength. Each of the plurality of received wireless signals may be amplified prior to the measuring. One or both of an in-phase (I) component and/or a quadrature (Q) component may be generated for each of the M generated signals.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: November 26, 2013
    Assignee: Broadcom Corporation
    Inventors: Arya Behzad, Ali Afsahi, Mark Gonikberg
  • Patent number: 8588835
    Abstract: A disclosed base station apparatus for a mobile communication system includes a collection unit collecting measured data from one or more user equipment terminals with respect to each direction of arrival, the measured data including at least quality information of a downlink signal, a conversion unit converting the measured data into an evaluation value in accordance with a predetermined evaluation function, a deriving unit deriving a weight update amount determining directivity based on an angular distribution of the plural evaluation values, and a transmission unit transmitting a downlink signal weighted based on the weight update amount.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: November 19, 2013
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yuki Inoue, Keizo Cho