Noise, Distortion, Or Unwanted Signal Detection (e.g., Quality Control, Etc.) Patents (Class 455/67.13)
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Patent number: 8743945Abstract: Described embodiments receive a signal by a set of fixed taps and a set of floating taps of a receiver, each tap corresponding to a detected symbol. Each of the floating taps is stored in a corresponding shift register to account for process, operating voltage and temperature (PVT) variations of the receiver without calibration of delay elements. Multiplexing logic selects (i) corresponding floating taps for equalization by coupling selected floating taps to the outputs of the fixed taps, and (ii) different phases of each possible floating tap position. The multiplexing logic prunes and/or amalgamates the phases of each possible floating tap position and selects floating taps based on a magnitude of each phase. A combiner adjusts each output value of the fixed taps and the selected floating taps by a corresponding tap-weight, combines the adjusted values into an output signal and subtracts the output signal from the input signal.Type: GrantFiled: July 3, 2012Date of Patent: June 3, 2014Assignee: LSI CorporationInventors: Pervez M. Aziz, Hiroshi Kimura, Amaresh V. Malipatil, Hairong Gao
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Patent number: 8744366Abstract: An apparatus (10) is disclosed for controlling a digitally controlled attenuator (30). The apparatus includes a programmable logic device (38), to control both the final value of attenuation and the rate of change of attenuation from the initial attenuation value in the attenuator (30) to the final value of attenuation. The apparatus forms a digital stair case ramp and steps the attenuator in such fine granular steps as to form essentially a continuously variable attenuator. Both the final value of attenuation and the rate of change of attenuation can be selected by the operator on the control panel (20) with attenuation select switches (22) and rate select switch (26). Alternatively, the attenuation can be input with an attenuation control knob (28). A digital display (24) displays the attenuation. The apparatus (10) can be remotely controlled with a GPIB or other remote control.Type: GrantFiled: September 26, 2008Date of Patent: June 3, 2014Inventor: Richard K. Steen
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Patent number: 8743842Abstract: A system that incorporates teachings of the subject disclosure may include, for example, a method for analyzing a wide frequency band with respect to signal power levels in specified narrow frequency bands, detecting narrow band signal power levels received in the specified narrow frequency bands, determining an average composite wideband power level from the narrow band signal power levels, determining an adaptive threshold, scanning a known narrow band channel of the wide frequency band having a history of causing interference in the wide frequency band, and detecting according to one of the adaptive threshold, the average composite wideband power level, or both, interference in the wide frequency band caused by signals transmitted in the known narrow band channel. Other embodiments are disclosed.Type: GrantFiled: August 16, 2012Date of Patent: June 3, 2014Assignee: ISCO International, LLCInventors: Charles E. Jagger, Mark N. Willetts, Micolino Tobia
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Patent number: 8738068Abstract: A method for controlling data transmission in a station in a wireless communication network is discussed. The method includes: receiving feedback information including error information including a signal to noise ratio (SNR) from a target station, the error information being measured by the target station; and controlling transmission parameters of the transmit data in a transmitting station based on the error information, wherein controlling the transmission parameters includes: increasing the transmit power when the SNR is lower than a predetermined value; initiating a beam-tracking process when the SNR is still lower than the predetermined value after increasing the transmit power; and decreasing a data transmission rate when the SNR is still lower than the predetermined value after initiating the beam-tracking process.Type: GrantFiled: September 11, 2009Date of Patent: May 27, 2014Assignee: LG Electronics Inc.Inventors: Joong Heon Kim, Beom Jin Jeon
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Patent number: 8738067Abstract: A method and apparatus for controlling the transmit power of a mobile BS in a wireless communication system are provided. The method includes determining a measurement value for determining if a noise power level is higher than an interference power level, when the measurement value is higher than a threshold value, determining that the noise power level is higher than the interference power level, and, when it is determined that the noise power level is higher than the interference power level, increasing transmit power.Type: GrantFiled: February 15, 2011Date of Patent: May 27, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: In-Taek Lee, Byoung-Ha Yi
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Patent number: 8738063Abstract: A wireless device associated with a first profile is communicated with using a first multi-antenna mode. Communication is received from a plurality of wireless devices associated with a second profile. The plurality of wireless devices are determined to be located within a defined area of the wireless device. Based on the determination that the plurality of wireless devices are located within the defined area of the wireless device, at least one of the plurality of wireless devices is sent at least one control message that instructs the at least one of the plurality of wireless devices to transmit a future communication at a lower power level.Type: GrantFiled: October 24, 2008Date of Patent: May 27, 2014Assignee: Sprint Communications Company L.P.Inventors: Hemanth Balaji Pawar, Swati Tiwari, Krishna D. Sitaram, Jong-hak Jung, Esmail Hejazi Dinan
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Patent number: 8737195Abstract: A base station outputs first detection information representing a code of a reference signal and representing a mobile device that is determined, on the basis of transition of a status at the time of occurrence of disconnection of the radio link between the mobile device and the base station, to be capable of causing the collision, and second detection information representing a code of a reference signal and representing a mobile device that is determined, on the basis of occurrence of failure of reconnection of the radio link between the mobile device and the base station, to be capable of causing the collision. A collision detection device estimates that, when the code and the mobile device of the first detection information coincide with the code and the mobile device of the second detection information, the collision of the reference signal will be caused.Type: GrantFiled: September 14, 2011Date of Patent: May 27, 2014Assignee: NEC CorporationInventor: Kazunori Ohashi
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Patent number: 8737508Abstract: In the communications system of the present invention, a communications terminal determines a precoding matrix index in a pilot signal received through a specific downlink channel, examines channel quality information of the downlink channel according to the determined precoding matrix index, and transmits feedback information to a serving base station, which determines a priority factor by using the examined channel quality information, and compares the priority factor with other priority factors. The comparison is used such that a base station having a high priority suggests the use of the precoding matrix to the neighboring base station.Type: GrantFiled: October 21, 2009Date of Patent: May 27, 2014Assignee: Samsung Electronics Co., LtdInventors: Yu Seok Kim, Eun Yong Kim, Yung Soo Kim, Sang Min Lee
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Patent number: 8731475Abstract: A first communication device receives a communication from a second communication device. The communication could be part of the signaling used to establish a call to the second communication device or an audio signal that the second communication device conveys after its user has answered the call and started speaking. Based on the communication from the second communication device, the first communication device provides a user-discernible indication regarding the environment in which the second communication device is being used, such as an indication that the second communication device is being used with a speakerphone. If the second communication device is being used in a vehicle, the first communication device may also provide a user-discernible indication regarding the operational status of the vehicle, such as whether the vehicle is in motion and/or the number of occupants in the vehicle.Type: GrantFiled: December 30, 2009Date of Patent: May 20, 2014Assignee: Sprint Spectrum L.P.Inventors: Simon Youngs, Gary Koller, Piyush Jethwa, Mark Peden
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Patent number: 8731503Abstract: A method is disclosed that includes measuring, under control of one or more processors of a mobile device, performance of a radio frequency reception parameter for radio frequency reception for the mobile device. The mobile device includes one or more antennas over which the radio frequency reception occurs and the one or more processors. The method includes causing movement of the mobile device to improve the performance of the radio frequency reception parameter. A mobile device includes one or more antennas over which radio frequency reception occurs, one or more processors, and one or more memories including computer program code. The mobile device performs at least the following: measuring, under control of the one or more processors, performance of a radio frequency reception parameter, and causing movement of the mobile device to improve the performance of the a radio frequency reception parameter. Program products are also disclosed.Type: GrantFiled: April 29, 2010Date of Patent: May 20, 2014Assignee: Nokia CorporationInventors: Mika P. Kangas, Mika P. Eade, Harri P. Luhtala, Ari J. Koski, Jari J. Huhtamaki
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Patent number: 8731567Abstract: A system and method for automatic fractional frequency reuse (FFR) planning are provided. A method for controller operations includes determining a group of frequency reuse modes, assigning at least one frequency reuse mode to a controller based on mutual relationship information, where the at least one frequency reuse mode is from the group of frequency reuse modes, and sharing the at least one frequency reuse mode with communications controllers coupled to the controller.Type: GrantFiled: May 27, 2011Date of Patent: May 20, 2014Assignee: Futurewei Technologies, Inc.Inventors: Liqing Zhang, Jianglei Ma, Zhijun Chao
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Patent number: 8730785Abstract: A system that incorporates teachings of the present disclosure may include, for example, a controller to: determine crosstalk coupling characteristics between a plurality of lines of a Digital Subscriber Line (DSL) system connected to a plurality of modems based on a transition between a full power mode and one or more other modes, and provide the determined crosstalk coupling characteristics to one or more of the plurality of modems for performance of at least one of pre-coding a transmitted signal and processing a received signal along a line of the plurality of lines, where the pre-coding and processing is performed based at least in part on the determined crosstalk coupling characteristics, and where the pre-coding of the transmitted signal and the processing of the received signal reduce effects of fluctuating crosstalk. Other embodiments are disclosed.Type: GrantFiled: March 11, 2009Date of Patent: May 20, 2014Assignees: AT&T Intellectual Property I, L.P., Adaptive Spectrum and Signal Alignment, Inc.Inventors: Thomas Starr, Peter J. Silverman, George Ginis
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Patent number: 8731597Abstract: A power control command (PCC) transmission scheme is disclosed. In one embodiment, the PCC transmission scheme may involve an access network engaging in a respective existing communication session with each of a plurality of existing access terminals and sending a respective existing series of power control commands (PCCs) directed to a respective existing access terminal according to a respective existing time schedule. The transmission scheme may further involve the access network deciding to initiate a new communication session with a new access terminal and, in response to the deciding, assigning a new time schedule for sending a new series of PCCs directed to the new access terminal that differs from at least one respective existing time schedule. The transmission scheme may further involve engaging in the new communication session with the new access terminal and sending the new series of PCCs according to the new time schedule.Type: GrantFiled: May 26, 2011Date of Patent: May 20, 2014Assignee: Sprint Spectrum L.P.Inventors: Sachin R. Vargantwar, Manoj Shetty, Deveshkumar Rai
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Patent number: 8731568Abstract: Aspects of the disclosure provide a device for managing wireless communication. The device can include an interface module coupled to at least a first wireless device. The first wireless device can communicate with a second wireless device using a first radio frequency (RF) signal that potentially interferes at least a second RF signal communicating between a third wireless device and a fourth wireless device. Further, the device can include a coexistence communication manager (CCM) configured to instruct at least the first wireless device to change at least the first RF signal according to an interference mitigation strategy that is determined based on status profiles of at least the first wireless device when the first RF signal interferes with at least the second RF signal.Type: GrantFiled: September 29, 2008Date of Patent: May 20, 2014Assignee: Marvell International Ltd.Inventors: Bracha Epstein, Yaron Ben-Arie
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Publication number: 20140133321Abstract: A test system for testing a wireless electronic device is provided. The test system may include a test host and a tester. The test host may instruct the electronic device under test (DUT) to transmit radio-frequency test signals in a selected resource block of a desired channel identified by a channel number in the Long Term Evolution frequency band. The tester may measure harmonic output power levels of the radio-frequency test signals transmitted by the DUT at harmonic frequencies of the selected resource block. The test host may compare the measured harmonic output power levels to threshold power levels to characterize the radio-frequency performance of wireless circuitry in the DUT. The test system may test the radio-frequency performance of the DUT for radio-frequency test signals transmitted by the DUT in some or all resource blocks in the desired Long Term Evolution band.Type: ApplicationFiled: November 13, 2012Publication date: May 15, 2014Applicant: Apple Inc.Inventors: Anh Luong, Aristoteles D. Pritsopoulos
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Patent number: 8725132Abstract: The performance and ease of management of wireless communications environments is improved by a mechanism that enables access points (APs) to perform automatic channel selection. A wireless network can therefore include multiple APs, each of which will automatically choose a channel such that channel usage is optimized. Furthermore, APs can perform automatic power adjustment so that multiple APs can operate on the same channel while minimizing interference with each other. Wireless stations are load balanced across APs so that user bandwidth is optimized. A movement detection scheme provides seamless roaming of stations between APs.Type: GrantFiled: January 5, 2010Date of Patent: May 13, 2014Assignee: Piccata Fund Limited Liability CompanyInventors: Floyd Backes, Gary Vacon, Paul Callahan, William Hawe, Roger Durand
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Patent number: 8725079Abstract: An interference analysis tool for identifying an interference problem area in a cellular radio network in which at least a first User Equipment (UE1) and a second UE (UE2) operate. The tool receives signal quality measurements and determines uplink or downlink interference severity. For UE2 uplink interference, the tool determines a first uplink Signal-to-Interference-and-Noise-Ratio (SINR) experienced by UE2, wherein the first SINR includes uplink interference from UE1. The tool also determines a second uplink SINR level (SINR0) experienced by UE2, wherein SINR0 does not include the uplink interference from UE1. The tool calculates a difference (?SINR) between SINR and SINR0 for UE2, and identifies the area where UE1 is operating as an interference-causing area when the ?SINR for UE2 is greater than a threshold value. The tool may present interference severity levels to an operator, and may initiate Radio Resource Management (RRM) procedures to mitigate interference problems in the network.Type: GrantFiled: September 13, 2011Date of Patent: May 13, 2014Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventors: Ke Wang Helmersson, Martin Hessler
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Patent number: 8717907Abstract: The present invention relates to receiving access signals from a plurality of terminals over a radio channel and in particular to determining a detection threshold level on the radio channel. A detection threshold level should balance the risk of missed detections to the risk of false detections. A problem in finding an equilibrium threshold is the radio environment, with noise and interference, change and then also the radio false detections or missed detections change. According to the present invention some access signals can be identified as being not assigned and therefore not being in use, and any detection of a non-used signal is identified as a false detection. By monitoring the ratio of false detections vs. correct detections the threshold level for detection is tuned into an equilibrium level, and that is adapted to the changing radio environments.Type: GrantFiled: February 21, 2008Date of Patent: May 6, 2014Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventors: Gunnar Bergquist, Tobias Tynderfeldt
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Patent number: 8718629Abstract: Provided is the information communication processing device capable of executing terminal function switching control in linkage with an external communication content on one information communication processing device based on the external communication content without a problem in switching. The information communication processing device has at least one information processing device having a plurality of function environments for executing an application, and a switching control unit for switching a function environment, in which the switching control unit determines a function environment to be switched based on contents of communication with the outside of the information communication processing device and sets context of the function environment to be switched at context of a function environment being executed, thereby executing switching to the function environment to be switched.Type: GrantFiled: July 18, 2007Date of Patent: May 6, 2014Assignee: NEC CorporationInventors: Hiroaki Inoue, Masato Edahiro
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Patent number: 8718565Abstract: A wireless access node comprises a wireless communication transceiver and a processing system. The wireless communication transceiver is configured to exchange wireless communications with a plurality of wireless communication devices over a plurality of wireless communication channels. The processing system is configured to monitor a loading level on the wireless communication channels to determine when the loading level exceeds a loading threshold, and when the loading level exceeds the loading threshold, calculate an efficiency of an interference cancellation process, compare the efficiency of the interference cancellation process to an efficiency threshold, and if the efficiency of the interference cancellation process falls below the efficiency threshold, modify a frame offset in use by the wireless communication devices on at least one reverse link communication channel.Type: GrantFiled: June 21, 2012Date of Patent: May 6, 2014Assignee: Sprint Communications Company L.P.Inventors: Deveshkumar Narendrapratap Rai, Sachin R. Vargantwar, Maulik K. Shah, Jasinder Pal Singh
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Patent number: 8718578Abstract: A circuit arrangement includes a component having a closed signal path, that closed signal path connected to a first port, a second port and at least a third port. The component has a directed signal flow of a signal applied to one of that ports. Such a coupling device can be connected to a transmitter and to a receiver path, respectively.Type: GrantFiled: September 7, 2012Date of Patent: May 6, 2014Assignee: Intel Mobile Communications GmbHInventors: Bernd Adler, Zdravko Boos
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Patent number: 8718569Abstract: A method of provisioning a communications link between remote terminals within a hub-spoke network comprising receiving, by a first remote terminal, information about a second remote terminal from a hub, selecting, by the first remote terminal, a modulation factor, coding rate, symbol rate, center frequency, and power level based on the information received about the second remote terminal, transmitting, by the first remote terminal, a signal using at least one of the selected modulation factor, coding rate, symbol rate, center frequency, and power level, to the second remote terminal such that a communications link is created, and adjusting the modulation factor, coding rate, symbol rate, center frequency, or power level of the transmitted signal such that performance of the link is increased while maintaining a presence of the link.Type: GrantFiled: February 29, 2012Date of Patent: May 6, 2014Assignee: Comtech EF Data Corp.Inventors: Vasile Manea, Michael Beeler, Frederick Morris, Jeffery Harig
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Patent number: 8718564Abstract: Aspects of mobility management within a wireless communications network including a plurality of sectors are disclosed. In an example, the wireless communications network includes a first cluster of sectors with at least one target sector and at least one supporting sector. The multicast communication session is carried within both the target and supporting sectors. In another example, a second cluster can be included within the network for supporting the same multicast communication session that includes its own target and supporting sectors. In this example, the first cluster transmits multicast media on a first interlace-multiplex (IM) pair of a downlink broadcast channel (BCH) and the second cluster transmits multicast media on a second IM pair of the downlink BCH. If sectors of the first and second clusters are at least adjacent, the network controls a manner in which the first and second clusters carry the multicast media.Type: GrantFiled: November 28, 2011Date of Patent: May 6, 2014Assignee: QUALCOMM IncorporatedInventor: Bongyong Song
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Patent number: 8718658Abstract: A method of operating a target terminal being serviced by a serving base station is provided. In a downlink case, the target terminal being served by the serving base station may provide a feedback message to a neighboring base station. The feedback message may be used by the neighboring base station to verify channel information between the serving base station and the target terminal, and channel information between the neighboring base station and the target terminal. In an uplink case, the neighboring base station may provide the feedback message to the target terminal. The target terminal may transfer, to the serving base station, channel information between the neighboring base station and a particular terminal, and channel information between the neighboring base station and the target terminal that are verified based on the feedback message. The feedback message may be transferred using a common shared channel or a random access channel.Type: GrantFiled: March 2, 2010Date of Patent: May 6, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Hyun Ho Choi, Hyo Sun Hwang, Jong Bu Lim
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Patent number: 8718568Abstract: Methods and systems to configure and/or reconfigure measurement configuration in wireless communications with one or more cells are disclosed. Measurement configuration reporting may be reconfigured based on events associated with the one or more serving cells and/or one or more serving component carriers, among others. Measurement configuration and measurement configuration reporting may also be reconfigured based on events associated with one or more serving component carriers.Type: GrantFiled: December 22, 2010Date of Patent: May 6, 2014Assignee: InterDigital Patent Holdings, Inc.Inventors: Paul Marinier, Ghyslain Pelletier, Kai Liu, Robert L. Olesen, Peter S. Wang
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Patent number: 8718566Abstract: Disclosed is a device and method to automate the process of measuring RF noise, correlating measured noise with known sources, and making adjustments to the noise-measuring and reporting process. A wireless communication device is coupled to equipment at a fixed location, and transmits data about the operation of the equipment back to an operator, via a provider's network. Examples include fixed wireless terminals. A management entity aboard the wireless communication device performs the measurements via a transceiver, and performs remedial actions when required, without requiring an onsite technician or remote assistance. The management entity may include a spectrum analyzer.Type: GrantFiled: August 21, 2012Date of Patent: May 6, 2014Assignee: AT&T Mobility II LLCInventor: Scott D. Prather
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Patent number: 8718024Abstract: A system that incorporates teachings of the subject disclosure may include, for example, a method for analyzing a wide frequency band with respect to signal power levels in specified narrow frequency bands, detecting narrow band signal power levels received in the specified narrow frequency bands, determining an average composite wideband power level from the narrow band signal power levels, determining an adaptive threshold, detecting narrow band interference according to the adaptive threshold, and configuring a variable bandwidth of a filter to substantially suppress the detected narrow band interference. Other embodiments are disclosed.Type: GrantFiled: July 17, 2012Date of Patent: May 6, 2014Assignee: ISCO International, LLCInventors: Charles E. Jagger, Mark N. Willetts, Micolino Tobia
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Patent number: 8717986Abstract: Provided is a data transmission system that may determine a multiple input multiple output dynamic spectrum management (MIMO-DSM) operation mode of a base station based on information associated with a data transmission route and a computational capability of each base station. A terminal may generate feedback information based on a cooperation level between base stations and may transmit the generated feedback information to a serving base station. The serving base station may select terminals that may receive data from among a plurality of terminals through a MIMO-DSM algorithm and a user scheduling based on the feedback information.Type: GrantFiled: November 4, 2010Date of Patent: May 6, 2014Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Won Jong Noh, Yung Yi, Tae Soo Kwon, Soo Hwan Lee, Chang Yong Shin
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Patent number: 8718642Abstract: The embodiments of the present invention disclose a method for establishing a cell reselection list is provided. A network and a terminal establish frequency indexes for the cell reselection list, so that when a network side delivers an RAT and frequency priority information, the priority information may be delivered according to frequency indexes in a frequency list, thus implementing cell reselection that is based on the priority for the terminal.Type: GrantFiled: April 16, 2012Date of Patent: May 6, 2014Assignee: Huawei Technologies Co., Ltd.Inventors: Jiyong Wang, Yongjun Yu, Yang Zhao, Ming Fang
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Patent number: 8712331Abstract: A method and apparatus for mitigating out of band emissions among user equipment and base stations operating at geographically co-located and spectrally distinct wireless communication systems are provided herein. During operation, a wireless radio will determine potential interferers. Preferably, these interferers comprise user equipment and base stations operating at geographically co-located and spectrally distinct wireless communication systems. Once determined, a channel quality indicator (CQI) will be adjusted accordingly to accommodate for any potential interferer. Because the CQI will take into effect any potential interferer, transmissions to/from the wireless radio will be made more robust, decreasing channel interference.Type: GrantFiled: April 13, 2012Date of Patent: April 29, 2014Assignee: Motorola Solutions, Inc.Inventors: Isam R. Makhlouf, Michael H. Baker, Xiaowei Jin
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Patent number: 8712345Abstract: A distortion compensation device includes: a frequency-characteristic adding unit configured to add a frequency characteristic to an error signal to generate an added error signal, the error signal being a difference between an input signal input to an amplifier and an output signal output from the amplifier; a distortion-compensation-coefficient updating unit configured to update a distortion compensation coefficient for compensating for a distortion characteristic of the amplifier based on the added error signal; and a distortion compensation unit configured to perform distortion compensation on the input signal using the updated distortion compensation coefficient.Type: GrantFiled: July 26, 2012Date of Patent: April 29, 2014Assignee: Fujitsu LimitedInventors: Hiroyoshi Ishikawa, Kazuo Nagatani, Nobukazu Fudaba, Yuichi Utsunomiya
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Patent number: 8712333Abstract: A system including a sensing module to sense an interference signal in a wireless channel, determine whether the interference signal is noise or a modulated signal transmitted by a device, and attempt to determine a modulation scheme of the modulated signal. A capacity determination module determines capacities of the wireless channel to transmit data using a plurality of modulation schemes. The plurality of modulation schemes includes (i) the modulation scheme used by the device to modulate the modulated signal if the sensing module can determine the modulation scheme of the modulated signal and (ii) one or more modulation schemes that can be used by the device to modulate the modulated signal if the sensing module cannot determine the modulation scheme of the modulated signal. A selection module selects, based on the capacities of the wireless channel, one of the plurality of modulation schemes to transmit data over the wireless channel.Type: GrantFiled: January 15, 2013Date of Patent: April 29, 2014Assignee: Marvell International LtdInventor: Jungwon Lee
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Patent number: 8711760Abstract: A wireless communication device, a wireless communication system and a method to adjust transmitted signals constellation in a maximum likelihood multiple-input-multiple-output receiver by transmitting an EVM deviation value. The EVM deviation value may be added to a pre-stored error value at the receiver.Type: GrantFiled: March 26, 2010Date of Patent: April 29, 2014Assignee: Intel CorporationInventor: Assaf Kasher
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Patent number: 8712337Abstract: A system and method for monitoring an attribute of a received signal in a wireless network having plural radios wherein one of the radios includes a monitoring module operatively connected to a second network. An attribute of one radio is monitored substantially continuously at the monitoring module. A display device is operatively connected to the second network. A value representative of the current state of the attribute is transmitted via the second network to the display device upon a change in the state of the attribute from a previous state of the attribute, and the value is displayed on the display device.Type: GrantFiled: October 25, 2011Date of Patent: April 29, 2014Assignee: Aviat U.S., Inc.Inventors: Brian Stuart Shiver, Gregory Allan Liles
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Patent number: 8706132Abstract: An object of the present invention is to provide a radio communication system capable of effectively coping with the two problems, which are in a trade-off relation between the deterioration of the use efficiency of the radio resources and the deterioration of the radio quality of the secondary cell, in the cases where both a combination of carrier frequency bands that are away from each other and a combination of carrier frequency bands that are adjacent to each other can be alternatively used as the combination of carrier frequency bands for a primary cell and a secondary cell. A radio communication system according to the present invention includes a mobile station (20), and a base station (10) configured to perform radio communication with the mobile station (20) by using first and second carrier frequency bands simultaneously for at least one of an uplink direction and a downlink direction.Type: GrantFiled: February 8, 2010Date of Patent: April 22, 2014Assignee: NEC CorporationInventor: Hiroaki Aminaka
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Patent number: 8706061Abstract: A method and system mitigates receiver desensitization caused by a reverse inter-modulation distortion (IMD) signal generated by a power amplifier associated with one of at least two concurrently operating transmitters. A power amplifier controller (PAC) determines whether at least one power amplifier operating in a first operating state generates a reverse IMD signal that can substantially interfere with at least one receive channel due to a concurrent operation of at least two concurrently operating transmitters. In response to determining that at least one power amplifier generates the reverse IMD signal when in the first operating state, the PAC initiates a second operating state of the power amplifier to increase the linearity of the at least one power amplifier in order to reduce the reverse IMD signal. The PAC initiates the second operating state by adjusting parameters of the power amplifier.Type: GrantFiled: August 16, 2012Date of Patent: April 22, 2014Assignee: Motorola Mobility LLCInventors: Armin W. Klomsdorf, Gregory R. Black, Ryan J. Goedken
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Patent number: 8706128Abstract: The illustrative embodiments described herein are directed to a method and apparatus for managing frequencies used by devices. In one embodiment, the process detects a set of frequencies from a set of devices to form a set of assigned frequencies. The process may also detect a first frequency used by a first device. The process may determine whether the first frequency interferes with the set of assigned frequencies. The process may also identify an unassigned frequency for use by the first device in response to determining whether the first frequency interferes with the set of assigned frequencies.Type: GrantFiled: June 4, 2013Date of Patent: April 22, 2014Assignee: CenturyLink Intellectual Property LLCInventors: Shekhar Gupta, Carl M. Coppage
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Patent number: 8700085Abstract: A method for a wireless communication network is presented. In one embodiment, the method includes receiving, by a base station, information about one or more interfering base stations with respect to a communication channel used by a mobile station. The method includes sending silence requests to an interfering base station to reduce interference from that interfering base station with respect to the communication channel. The method further includes establishing communication with the mobile station via the communication channel.Type: GrantFiled: November 30, 2010Date of Patent: April 15, 2014Assignee: Intel CorporationInventors: Kerstin Johnsson, Shilpa Talwar, Nageen Himayat
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Patent number: 8700045Abstract: To avoid or reduce intra-cell interference, each sector of a cell is associated with a sector-specific set of system resources (e.g., subbands) and at least one non-overlapping common set of system resources. Each common set for each sector includes system resources observing little or no interference from at least one other sector in the cell. The channel condition for a terminal in a given sector x is ascertained based on forward and/or reverse link measurements for the terminal. The terminal is assigned system resources from a common set or a sector-specific set for sector x based on the terminal's channel condition. For example, if the terminal observes high interference from another sector y, then the terminal is assigned system resources from a common set that observes little or no interference from sector y. The techniques may be used for an OFDMA system that uses frequency hopping.Type: GrantFiled: November 12, 2009Date of Patent: April 15, 2014Assignee: QUALCOMM IncorporatedInventors: Tingfang Li, Avneesh Agrawal
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Publication number: 20140099901Abstract: A system for determining an actual interferer transmitting an interfering signal including first frequency portions of the interfering signal in a predetermined frequency band of a useful signal is provided. The system includes a signal evaluator configured to determine for each possible interferer of the plurality of possible interferers coefficient information of the possible interferer based on representation information of the possible interferer and based on processing information, such that the coefficient information of the possible interferer and the representation information of the possible interferer together indicate the preprocessed signal, wherein the processing information and the preprocessed signal together indicate the compressed signal.Type: ApplicationFiled: October 4, 2013Publication date: April 10, 2014Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Alexander RUEGAMER, Ivana LUKCIN
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Patent number: 8694036Abstract: An apparatus and a method provide for uplink interference coordination in a radio communication system, such as a cellular communication system. Measurements are made at mobile stations associated with uplink-channel interference conditions. Reports are made to the network when a mobile station experiences interference conditions beyond a measurement threshold. If greater than a group-threshold number of mobile stations experience high levels of uplink-channel interference, communication resources are reallocated in compensation for the high interference conditions.Type: GrantFiled: May 21, 2012Date of Patent: April 8, 2014Assignee: BlackBerry LimitedInventors: Xusheng Wei, Zhijun Cai, Gordon Peter Young
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Patent number: 8694046Abstract: A user equipment (UE) includes circuitry configured to receive control information on a downlink control channel from a base station. The control information indicates an allocation of an uplink channel and the control information is sent in response to the base station determining that the UE is to send an adaptive modulation and coding report. The circuitry is further configured in response to the control information to transmit a communication in the allocated uplink channel in a time interval including at least one time slot. The communication includes an adaptive modulation and coding report, and a transmission power level of the communication is derived from the control information and a pathloss measured by the UE.Type: GrantFiled: January 31, 2012Date of Patent: April 8, 2014Assignee: InterDigital Technology CorporationInventors: Stephen G. Terry, Stephen G. Dick, James M. Miller, Ariela Zeira, Eldad M. Zeira
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Patent number: 8687517Abstract: A method and device for identifying degradation in service quality for a wireless media service. The wireless media service has a known expected packet generation rate, which may be determined by the device based upon the codec and payload size selected on initiating the media service. At a receiving device, the packets actually received by the device from the other termination point are counted over a time period, and this number is compared with the number of packets that were expected based upon the known packet generation rate. From this comparison a packet loss rate may be determined. If the packet loss rate exceeds a threshold level, then the device may issue a user alert, terminate the service, or take other action. The threshold level may be established based upon a packet loss rate corresponding to a significant degree of service quality degradation.Type: GrantFiled: June 8, 2012Date of Patent: April 1, 2014Assignee: BlackBerry LimitedInventors: Sherif Abdel-Kader, Michael Chen
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Patent number: 8688159Abstract: Disclosed is a mechanism for efficient channel selection in a wireless communication system. A wireless communication device (WCD) receives from a radio access network (RAN) a channel list message that specifies channels on which the RAN communicates in a coverage area. Further, the WCD receives from the RAN for at least a given one of the channels an expected delta value indicating an expected difference in signal strength between that channel and another channel. The WCD may then take an actual measurement of signal strength on the other channel and apply the expected delta to predict a signal strength of the given channel. Based on the predicted signal strength being threshold low, the WCD may then select a channel other than the given channel on which to communicate with the RAN, and the WCD may then communicate with the RAN on the selected channel.Type: GrantFiled: January 24, 2011Date of Patent: April 1, 2014Assignee: Sprint Spectrum L.P.Inventors: Jasinder P. Singh, Maulik K. Shah, Jason P. Sigg, Ashish Bhan
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Patent number: 8688054Abstract: A method and apparatus for adaptively biasing a channel quality indicator (CQI) used for setting a configuration of communication between a transmitter and a receiver in a wireless communication system. The receiver sends a CQI and positive acknowledgement (ACK)/negative acknowledgement (NACK) messages to the transmitter. The ACK/NACK messages indicate the absence or presence of error, respectively, in a transmitted data packet. The CQI is derived from the signal-to-interference ratio (SIR) and the ACK/NACK messages. The transmitter calculates the block error rate (BLER) of the transmitted data packets based upon the ACK/NACK messages sent from the receiver. The transmitter compares the BLER of the transmitted data packets to a target BLER and biases the CQI based on the comparison in order to achieve the target BLER.Type: GrantFiled: November 21, 2008Date of Patent: April 1, 2014Assignee: InterDigital Technology CorporationInventors: Philip J. Pietraski, Gregory S. Sternberg, Douglas R. Castor
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Patent number: 8688154Abstract: A method and system are disclosed herein for power allocation and/or clustering in a wireless communication system that uses blind interference alignment. In one embodiment, the system comprises a plurality of receivers, where each receiver in the plurality has a multi-mode antenna with a single radio frequency (RF) chain that is operable in a plurality of antenna modes, and wherein each receiver shifts between the plurality of antenna modes in a predetermined manner. The system also includes a plurality of base stations to perform cluster-based transmission, each base station in the plurality of base stations having one or more transmitters having a transmit antenna and being operable to communicate with one or more of receivers in the plurality of receivers using a blind interference alignment (BIA) scheme, and wherein the plurality of base stations are grouped in different clusters at different times according to cluster patterns.Type: GrantFiled: September 1, 2011Date of Patent: April 1, 2014Assignee: NTT DoCoMo, Inc.Inventors: Haralabos Papadopoulos, Sean A. Ramprashad, Chenwei Wang
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Patent number: 8688034Abstract: The apparatus comprises a plurality of antennas that are configured to receive wireless signals comprising communication signals and interference signals. Each antenna provides an antenna output signal that is processed by a wireless signal processor of the apparatus to generate a processed wireless signal. A user equipment (UE) communication interface is configured to transmit the processed wireless signal to the mobile wireless communication device. A signal quality feedback interface receives, from the mobile wireless communication device, a wireless feedback signal indicating the characteristic of the processed wireless signal received at the mobile wireless communication device. The wireless signal processor combines the antenna output signals based on the wireless feedback signal to minimize interference signals received at the mobile wireless communication device.Type: GrantFiled: September 8, 2011Date of Patent: April 1, 2014Assignee: KYOCERA CorporationInventor: Amit Kalhan
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Patent number: 8682392Abstract: A base station includes multiple transmitter-receiver elements coupled to multiple antennas. The activation of additional baseband signal processing resources, dynamically mapped via a programmable digital interface module to a subset of the original transmitter-receiver sets in the base station to double capacity of the system or facilitate simultaneous operation of multiple air interface technologies with minimal or no hardware modifications to the base station or cell site. With a base station having four transmitter-receivers, the system transmits and receives the same signal on all transmitter-receivers to provide a 4×2 downlink and a 1×4 uplink. The system can be reconfigured by splitting the transmitter-receiver sets into two logically separate units. An additional base station modem resource is activated to double the capacity of the radio system or to implement a different communication protocol allowing transition between technologies.Type: GrantFiled: December 27, 2011Date of Patent: March 25, 2014Assignee: Clearwire IP Holdings LLCInventors: Peter Gelbman, Durga Prasad Satapathy
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Patent number: 8683064Abstract: Disclosed herein, among other things, are apparatus and methods for interactive property communication. In various embodiments, an interactive property communication system includes two or more property communication nodes (PCNs) each adapted for coupling to an electrical service. PCNs include a radio transceiver for communications with a broker service adapted for controlling communications with one or more PCNs.Type: GrantFiled: October 24, 2012Date of Patent: March 25, 2014Inventor: Curtis E. Quady
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Patent number: 8682367Abstract: A base station, a user equipment, and a method for operating a cooperative multipoint (CoMP) transmitter and receiver (Tx/Rx) are disclosed. The operating method includes receiving, from a peripheral cell, precoding matrix index (PMI) information to be used by a user equipment of the peripheral cell, and transmitting the received PMI information to target user equipments allocated with an entire frequency range, among a plurality of user equipments present in a current cell.Type: GrantFiled: September 12, 2011Date of Patent: March 25, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: Hyung-sub Kim, Kyung Sook Kim, Yeon Seung Shin