Rayleigh Or Multipath Fading Patents (Class 455/506)
  • Patent number: 10334404
    Abstract: Wireless communication via a mesh network of connected movable objects is described. A method includes determining, by a device including a processor, a value of a characteristic of a first movable object of movable objects communicatively coupled to a wireless network, wherein the movable objects are automated vehicles, and wherein the determining the value is based on a likelihood of receipt of a message transmitted from the first movable object to a second movable object of the movable objects. The method also includes generating information usable to move the first movable object in a manner that satisfies a defined condition associated with the value. The information can be strength of a wireless communication channel between the first movable object and a second movable object of the movable objects.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: June 25, 2019
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Christopher Baldwin, Nikhil S Marathe
  • Patent number: 10277299
    Abstract: A communication device may comprise a plurality of distributed transceivers and one or more corresponding antenna arrays. A processor may configure a first distributed transceiver to receive signals comprising one or more first data streams via one or more first communication links. The processor may configure a second distributed transceiver to receive signals comprising one or more second data streams via one or more second communication links. The processor may determine a channel response matrix associated with communication of the one or more first data streams via the one or more first communication links and/or the one or more second data streams via the one or more second communication links. The processor may optimize one or both of link capacity and/or link reliability of the one or more first communication links and/or the one or more second communication links based on the determined channel response matrix.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: April 30, 2019
    Assignee: GOLBA LLC
    Inventor: Mehran Moshfeghi
  • Patent number: 10271180
    Abstract: In some embodiments, one or more wireless stations operate to configure direct communication with neighboring mobile stations, e.g., direct communication between the wireless stations without utilizing an intermediate access point. Embodiments of the disclosure relate to a mechanism for a device to perform multicast communications amongst a group of peer devices. Embodiments described herein provide mechanisms for initiation (or establishment) and scheduling of a multicast group as well as enrollment of a device into a multicast group, merging of multicast groups, and termination of multicast groups.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: April 23, 2019
    Assignee: Apple Inc.
    Inventors: Yong Liu, Su Khiong Yong, Christiaan A. Hartman, Lawrie Kurian, Peter N. Heerboth, Guoqing Li
  • Patent number: 9851399
    Abstract: A method for checking a circuit devised for contactless data communication, which comprises an antenna and an electronic component coupled with the antenna, comprises the following steps: generating an alternating magnetic field of a field strength, and arranging the circuit in the alternating field region. Then the electronic circuit is excited by means of an energy pulse. In a further step, an oscillation of the circuit in response to the excitation of the circuit by the energy pulse is captured. The captured oscillation of the circuit is finally evaluated, in particular with regard to a self-resonant frequency of the circuit.
    Type: Grant
    Filed: February 5, 2014
    Date of Patent: December 26, 2017
    Assignee: GIESECKE+DEVRIENT MOBILE SECURITY GMBH
    Inventors: Klaus Finkenzeller, Michael Baldischweiler
  • Patent number: 9768893
    Abstract: A unique method/device for isolating the over-the-air segment within a mobile communications network is provided. A coordinated set of tests is run to isolate problems in an end-to-end network including over-the-air segment, wired, and core network segments. Test results are compared to identify which segment or components within a segment is failing. The testing device executes the same test in two differentiated modes. In one mode, the device acts as a mobile client device identified by subscriber identification data that communicates with the network base station over-the-air using the standard control and data protocols of the mobile network. In another mode, the testing device, identified by the same subscriber identification data, acts like the combination of the same Mobile Client Device(s) and a Network Base Station using a wired interface that is equivalent to the wired interface that connects the network base station to the rest of the wired network.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: September 19, 2017
    Assignee: Spirent Communications, Inc.
    Inventors: Richard Wank, Mike Ludwig, Kevin Canady, Michael Shen
  • Patent number: 9681272
    Abstract: Wireless communication via a mesh network of connected movable objects is described. A method includes determining, by a device including a processor, a value of a characteristic of a first movable object of movable objects communicatively coupled to a wireless network, wherein the movable objects are automated vehicles, and wherein the determining the value is based on a likelihood of receipt of a message transmitted from the first movable object to a second movable object of the movable objects. The method also includes generating information usable to move the first movable object in a manner that satisfies a defined condition associated with the value. The information can be strength of a wireless communication channel between the first movable object and a second movable object of the movable objects.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: June 13, 2017
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Christopher Baldwin, Nikhil S Marathe
  • Patent number: 9584229
    Abstract: A data retransmission method, apparatus, and system can improve a success ratio of data packet retransmission. A data retransmission method includes: after a source node continuously transmits at least two data packets to a destination node according to a go-back-N automatic repeat request, monitoring and decoding, by a relay node, the at least two data packets; storing a copy of a successfully decoded data packet; monitoring a response message to each data packet, where the response message is returned by the destination node to the source node; and sending a copy of a data packet that corresponds to a reception negative acknowledgment message to the destination node, when the monitored response message is the reception negative acknowledgment message.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: February 28, 2017
    Assignee: HUAWEI DEVICE CO., LTD.
    Inventor: Zhenwei Chen
  • Patent number: 9560529
    Abstract: A method for designing and analyzing a wireless network located at terrestrial environments by using a method based on an algorithm utilizing a 3D stochastic multi-parametric (3DSM) model of a terrain area designated for the wireless network. The algorithm is used for designing a wireless network operable in the area and analyzing the performance of the wireless network. The 3D model methodology is applicable for calculating average field intensity in different outdoor environments which is derived for a three-dimensional geometry model and yields higher precision calculations for the mixed residential or sub-urban areas by considering the wide range of vertical and horizontal dimensions of houses and trees.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: January 31, 2017
    Assignees: D.P. ELECTRONIC SYSTEMS LTD., NOVEL TECHNOLOGIES OF TELECOMMUNICATION SYSTEMS
    Inventors: Nathan Blaunshtein, Nathalie Yarkoni
  • Patent number: 9282556
    Abstract: Provided is a base station for communicating with a mobile station by assigning at least a part of a communication frame including a plurality of wireless communication channels in a frequency direction. The communication frame includes at least one special subframe having a data transmission region available for transmission to the mobile station and a data reception region available for reception from the mobile station, separated from the data transmission region in a time direction. The base station includes an assignment unit 50 for assigning, in the special subframe, the data transmission region for transmission of downlink control information to nearby mobile stations and the data reception region for reception of uplink control information from the nearby mobile stations, and a transmission and reception unit 10 for transmitting the downlink control information in the data transmission region and for receiving the uplink control information in the data reception region.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: March 8, 2016
    Assignee: KYOCERA CORPORATION
    Inventor: Nobuaki Takamatsu
  • Patent number: 9274912
    Abstract: The disclosed examples provide techniques for simulation of a wireless mobile network that includes block level simulation of burst errors. The simulation allows input of a variable burst error rate to a system level simulation of a communications network. Theoretical error rates are replaced with variable burst error rates in the simulation. Injecting burst errors at the system level provides a network simulation that more realistically reflects the effects of burst errors on network performance.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: March 1, 2016
    Assignee: VERIZON PATENT AND LICENSING INC.
    Inventor: Adrian E. Conway
  • Patent number: 9277446
    Abstract: Embodiments of the invention concern a method for mitigating interference between near field communication and an audio stream in a mobile user equipment (1), wherein the method includes a step (S5) of replacing at least part of the interfered audio stream by a sound representative of an interfering near field communication transaction.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: March 1, 2016
    Assignee: ST-ERICSSON SA
    Inventors: Pablo Ignacio Gimeno Monge, Javier Del Prado Pavon, Nikhil Taluja
  • Patent number: 9219951
    Abstract: A mobile TV system architecture for a mobile terminal that reduces the processing required by the main processor during reception of digital broadcasts such as DVB-H. The mobile terminal architecture includes a main processor system and a mobile TV receiver device. The mobile TV receiver device includes units for SI/PSI processing, IP processing and decryption engine. The SI/PSI (service information/program specific information) processing unit receives non-protected transport stream (TS) packets and extracts SI/PSI tables which can be stored in memory local to the receiver device. The IP processing unit receives decrypted error-corrected protected packets containing multimedia content. The receiver device may include an HTTP server for communicating with a browser application running on the main processor system. The browser application presents multimedia content, received via HTTP, corresponding to a URL entered or selected by a user.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: December 22, 2015
    Assignee: ANALOG DEVICES, INC.
    Inventor: Kamran Sharifi
  • Patent number: 9036682
    Abstract: A method for mitigating a multi-path-induced error in a global navigation satellite system comprises, for a respective measurement epoch, obtaining respective representations of a composite signal including a plurality of value-pairs of the composite signal. The method further comprises, with respect to the measurement epoch: obtaining a plurality of coefficients for a set of linear equations based on the plurality of value-pairs of the composite signal; iteratively obtaining solutions for the set of linear equations, thereby solving for a code tracking timing offset, a time delay of a multi-path signal of the composite signal relative to its direct-path signal, and orthogonal representations of the multi-path signal; determining a phase error between the composite signal and the direct-path signal, due to the time delay, in accordance with the orthogonal representations of the multi-path signal; and correcting for the code tracking timing offset and the phase error.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: May 19, 2015
    Assignee: DEERE & COMPANY
    Inventors: Richard G. Keegan, Ronald R. Hatch
  • Patent number: 9002388
    Abstract: A radio wave arrival status estimating system characterized by having an estimating means that estimates whether the physical characteristic of a radio wave received at the reception point of a radio system to be evaluated has reached the minimum allowable level for determining the characteristic of the radio system; that estimates an arrival status of the radio wave at the reception point by applying a first radio wave propagation status estimating technique to the reception point when estimating that the physical characteristic has reached the minimum allowable level; and that estimates an arrival status of the radio wave at the reception point by applying a second radio wave propagation status estimating technique to the reception point when estimating that the physical characteristic has not reached the minimum allowable level.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: April 7, 2015
    Assignee: NEC Corporation
    Inventors: Hiroto Sugahara, Masahiro Motoyoshi, Takashi Ono
  • Patent number: 8996057
    Abstract: Characterization and enhancement of a mobile local scattering environment. The system includes a channel component and a link control component, wherein the channel component facilitates communication of a ping signal, which is used to estimate the delay spread characteristics and/or angle of arrival in order to characterize the mobile local scattering environment. This information is sent to the link control component, which enhances radio link performance based on the received information. The system can be used to assist in E-911 location applications, such as determining the location of an indoor user.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: March 31, 2015
    Assignee: AT&T Mobility II LLC
    Inventors: Ming-Ju Ho, Ali Jabbary, Stalin Albanes
  • Patent number: 8965300
    Abstract: A method for testing transmission modes of a wireless communication device. According to the method, a switching range is determined in a parameter space in a test device. The parameter of the parameter space describes the quality of transmission and influences a recommendation for a transmission mode to be adjusted in a device to be tested. The switching range is a subspace of the parameter space and contains at least one switching limit for the recommendation for the subsequent transmission mode to be adjusted. In a further step, random parameter points from the switching range are generated depending on a probability distribution which is defined for the switching range. A signal is generated for every parameter point and has a transmission mode determined by the parameter point and is transmitted to the device to be tested.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: February 24, 2015
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Andreas Pauly, Juergen Schlienz
  • Patent number: 8965428
    Abstract: The impact of a fading dip in a radio channel on the communication between a first and a second antenna may be reduced by receiving a sounding signal at the first antenna or the second antenna over the radio channel and measuring the frequency response of the radio channel using this sound signal that was received. The radio frequency signal that is used to communicate between the first antenna and the second antenna is adjusted in response to the frequency response that was measured in order to reduce an impact of the fading dip in the radio channel on the radio frequency signal during operation. Related systems, methods, and devices are disclosed.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: February 24, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Havish Koorapaty, Jan-Erik Berg, Jonas Hansryd
  • Patent number: 8891705
    Abstract: A method for processing a signal by a receiver, comprises the steps of: receiving the signal by the receiver, calculating one or more symbols based on the received signal; determining a multipath delay spread from the received signal; rebuilding one or more of the calculated symbols as a function of the multipath delay spread; and processing the rebuilt symbols for decoding by the receiver.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: November 18, 2014
    Assignee: Amlogic Co., Ltd.
    Inventors: Jinhong Zhang, Jin Niu
  • Patent number: 8874040
    Abstract: In an ad hoc peer-to-peer communication network between wireless devices, a high priory first receiver device is configured to perform successive interference cancellation (SIC). The first receiver device receives a first transmission request from a first transmitter device indicating that the first transmitter device intends to transmit traffic to the first receiver device. Similarly, the first receiver device receives a second transmission request from an interferer second transmitter device. The first receiver device then determines a transmission rate cap for the interferer second transmitter device based on the signal strengths of the first and second transmission requests and sends it to the interferer second transmitter device. The transmission rate cap is a maximum rate at which the first receiver device can reliably decode traffic signals from the second transmitter device.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: October 28, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Junyi Li, Rajiv Laroia, Saurabh Tavildar, Xinzhou Wu
  • Patent number: 8855567
    Abstract: In an ad hoc peer-to-peer communication network between wireless devices, a high priory first receiver device is configured to perform successive interference cancellation. A first pilot signal is received by the first receiver device from the first transmitter device. Similarly, a second pilot signal is received from a second transmitter device, the second pilot signal indicating that the second transmitter device intends to transmit a second traffic signal. The first receiver device determines a first and a second transmission rates for traffic transmissions from the first transmitter device. A control message is then transmitted by the first receiver device to the first transmitter device including the first and second transmission rates. Subsequently, the first receiver device wirelessly receives a traffic signal including a first traffic signal from the first transmitter device including a first and a second signal components generated from a first and a second codewords, respectively.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: October 7, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Junyi Li, Rajiv Laroia, Saurabh Tavildar, Xinzhou Wu
  • Patent number: 8849188
    Abstract: This document discloses one or more systems, apparatuses, methods, etc. for detecting a region (e.g., sub-meter) of interest (ROI) using radio signals. In an implementation, during training stage, multiple channel fading profile samples within a user defined ROI are received and stored in a portable device. During detecting stage, the portable device may implement a sub-meter ROI detection algorithm to perform the detection.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: September 30, 2014
    Assignee: Intel Corporation
    Inventors: Lei L T Yang, Xue X T Yang, Anthony G. Lamarca
  • Patent number: 8849197
    Abstract: In an ad hoc peer-to-peer communication network between wireless devices, a high priory first receiver device is configured to perform successive interference cancellation (SIC). The first receiver device sends a first rate report signal and a second rate report signal to a first transmitter device indicating a first and second transmission rates. A connection is established between the first transmitter device and the first receiver device in which the first receiver device is the intended receiver of traffic signals from the first transmitter device. The first receiver device receives a traffic signal in a subsequent traffic channel, the traffic signal including a first traffic signal from the first transmitter device having a first traffic transmission rate not exceeding the first transmission rate. The received traffic signal also includes a second traffic signal transmitted by an interfering second transmitter device having a second traffic transmission rate not exceeding the second transmission rate.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: September 30, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Junyi Li, Rajiv Laroia, Saurabh Tavildar, Xinzhou Wu
  • Patent number: 8843069
    Abstract: Techniques for transmitting data with short-term interference mitigation in a wireless communication system are described. In one design, a first station (e.g., a base station or a terminal) may send a first message to at least one interfering station to request reduction of interference on at least one resource. The first station may send the first message in anticipation of receiving data on the at least one resource. An interfering station may receive the first message from the first station and may reduce interference on the at least one resource by reducing its transmit power and/or by steering its power in a direction different from the first station. The first station may thereafter receive data from a second station on the at least one resource. The techniques may be used for data transmission on the forward and reverse links.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: September 23, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Mohammad J. Borran, Aamod Khandekar, Naga Bhushan, Ashwin Sampath, Alexei Gorokhov, Avneesh Agrawal, Ravi Palanki, Gavin B. Horn
  • Patent number: 8843166
    Abstract: A method for interference alignment in wireless network having 3 transmitters and 3 receivers which are equipped with M antennas is provided. The method comprising: transmitting, performed by each of the 3 transmitters, a pilot signal known to the 3 receivers; estimating, performed by each of the 3 receivers, each channel from transmitter; transmitting, performed by each of the 3 receivers, feedback information to target transmitter; and determining, performed by transmitter 2 and transmitter 3, a precoding vector; wherein a degree of freedom (DoF) of a transmitter 1 is (M/2??), a DoF of the transmitter 2 or the transmitter 3 is M/2.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: September 23, 2014
    Assignees: LG Electronics Inc., Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Han Byul Seo, Kaibin Huang, Soon Suk Roh, Sung Yoon Cho, Hyuk Jin Chae, Byoung Hoon Kim, Dong Ku Kim
  • Patent number: 8824536
    Abstract: Systems, methods, and devices enable spectrum management by identifying, classifying, and cataloging signals of interest based on radio frequency measurements. In an embodiment, signals and the parameters of the signals may be identified and indications of available frequencies may be presented to a user. In another embodiment, the protocols of signals may also be identified. In a further embodiment, the modulation of signals, data types carried by the signals, and estimated signal origins may be identified.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: September 2, 2014
    Assignee: DGS Global Systems, Inc.
    Inventors: Gabriel R. Garcia, Daniel Carbajal
  • Patent number: 8824582
    Abstract: A base station is arranged for performing channel coding and link adaptation. The base station comprises one or more processors and physical layer circuitry arranged to decode symbols received from a user station to determine an error rate, the symbols received through a plurality of antennas, receive signaling from the user station, the signaling including channel quality information for channel resources of an orthogonal frequency division multiplexed (OFDM) channel, select a modulation and coding rate for transmission of symbols to the user station based at least in part on the error rate, and transmit a transmit power control command to the user station, the transmit power control command based at least in part on a downlink path loss estimate. The base station may also transmit additional transmit power control commands to the user station based on the error rate of subsequently decoded symbols.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: September 2, 2014
    Assignee: Intel Corporation
    Inventors: Eric A. Jacobsen, Adrian P. Stephens
  • Patent number: 8767860
    Abstract: A method for communication includes performing by one or more processors and/or circuits in a communication device functions including determining transmit power weights, which are to be utilized for communicating one or more wireless signals via a wireless channel, as a function of frequency of a wireless signal communicated via the wireless channel. The determining may be based on a transmission mode of the wireless signal and a state of the wireless communication channel. Transmit antenna spatial weights may be determined for communicating the one or more wireless signals via a plurality of antennas. The one or more wireless signals may be weighted with the transmit power weights and/or one of the transmit antenna spatial weights. The weighted one or more wireless signals may be transmitted via one of a plurality of antennas in accordance with the transmission mode.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: July 1, 2014
    Assignee: Broadcom Corporation
    Inventors: Severine Catreux, Vinko Erceg, Pieter Roux, Pieter van Rooyen, Jack Winters
  • Patent number: 8768391
    Abstract: The present invention provides for a method of controlling selection of a localised scheduling scheme or a distributed scheduling scheme within an OFDMA downlink and including the step of estimating a fading characteristic and initiating switching between the scheduling schemes responsive to the result of the said estimation, wherein the fading characteristic can comprise one of fading rate or fading type, and wherein the invention can provide for such estimating functionality within a mobile radio communications device.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: July 1, 2014
    Assignee: NEC Corporation
    Inventors: Weili Ren, Michael Roberts
  • Patent number: 8744031
    Abstract: Provided are a device and method for estimating carrier frequency offset of OFDM signals transmitted and received through a plurality of polarized antennas that may accurately estimate carrier frequency offset used for carrier frequency synchronization acquisition when there is interference between polarized waves.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: June 3, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jun-Woo Kim, Young-Jo Bang, Kyung-Yeol Sohn, Se-Young Cho, Youn-Ok Park
  • Patent number: 8712457
    Abstract: A method for pricing wireless communications services on a wireless network is described. A selection of a plurality of priorities available for transmitting a wireless communication transaction on a wireless network is provided, wherein the priority to be selected corresponds to the speed and allowable delay by which the transaction is to be transmitted. Transactions of lower priority are temporarily discontinued in favor of higher priority transactions when network capacity reaches a predetermined level. An amount is charged for the wireless communication transaction at a price corresponding to the priority and duration to be selected.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: April 29, 2014
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Samuel N. Zellner, Mark J. Enzmann
  • Patent number: 8705645
    Abstract: An orthogonal-frequency division multiplexed (OFDM) transmitter is configured to transmit a data unit in accordance with a multiple-input multiple-output (MIMO) technique over a wideband channel comprising a 20 MHz channel and another channel using a plurality of spatially diverse antennas. The transmitter is further configured to include in the data unit, a parameter indicating a modulation and coding scheme and a parameter indicating number of spatial streams. Each of the spatial streams is encoded and beamformed for receipt by one or more different receiving stations.
    Type: Grant
    Filed: June 6, 2012
    Date of Patent: April 22, 2014
    Assignee: Intel Corporation
    Inventors: John S. Sadowsky, Minnie Ho, Sumeet Sandhu, Alexander A. Maltsev, Eric A. Jacobsen, Ali S. Sadri
  • Patent number: 8706058
    Abstract: A system comprises an outer shell having an inner spherical cavity and an inner sphere located in the spherical cavity. The inner sphere comprises a sensor; at least one transmit antenna; and at least one transmitter coupled to the sensor and to a respective one of the at least one transmit antenna. The system also comprises a first receive antenna located in the spherical cavity; a second receive antenna located in the spherical cavity; and a receiver located outside of the outer shell. The receiver is configured to determine the signal to noise ratio of a first signal received at the first receive antenna and the signal to noise ratio of a second signal received at the second receive antenna; and to combine the first and second signals based on the respective signal to noise ratios such that interference due to multi-path signals in the spherical cavity is reduced.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: April 22, 2014
    Assignee: Honeywell International Inc.
    Inventors: Halil N. Altan, Jamal Haque, Curtis Goulbourne
  • Patent number: 8699947
    Abstract: The present invention relates to a method and arrangement for positioning at least two devices, a first and a second device relative each other. The method comprises: transmitting a number of magnetic pulses with the first device, detecting said pulses with the second device, based on said detected pulses generating a number of virtual planes, and determining a crossing line between said planes corresponding to a direction between said devices.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: April 15, 2014
    Assignees: Sony Corporation, Sony Mobile Communications AB
    Inventors: Martin Nyström, Magnus Helgstrand
  • Patent number: 8682380
    Abstract: Characterization and enhancement of a mobile local scattering environment. The system includes a channel component and a link control component, wherein the channel component facilitates communication of a ping signal, which is used to estimate the delay spread characteristics and/or angle of arrival in order to characterize the mobile local scattering environment. This information is sent to the link control component, which enhances radio link performance based on the received information. The system can be used to assist in E-911 location applications, such as determining the location of an indoor user.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: March 25, 2014
    Assignee: AT&T Mobility II LLC
    Inventors: Ming-Ju Ho, Ali Jabbary, Stalin Albanes
  • Patent number: 8676137
    Abstract: A mobile wireless terminal includes a wireless receiving part configured to receive a wireless signal from a base station which belongs to a mobile communication system using a time-frequency conversion for baseband processing; a received signal processing part that includes a time-frequency converting circuit and is configured to process the wireless signal; a setting part configured to successively set central frequencies within regions, wherein a frequency band that the mobile communication system uses is divided into the regions having a predetermined bandwidth; and a received signal strength measuring part configured to measure signal strength of received signals over the regions of the frequency band that the mobile communication system uses based on time-frequency conversion results from the time-frequency converting circuit, the time-frequency conversion results being obtained for the respective regions using the respective central frequencies set by the setting part.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: March 18, 2014
    Assignee: Fujitsu Mobile Communications Limited
    Inventor: Yoshiyuki Kubo
  • Patent number: 8626213
    Abstract: The present invention relates to methods, a communication network node and a user equipment for detecting collision of physical cell identities in a communication network system comprising radio base stations each serving at least one cell through which user equipments are moving. Reference signals comprising reference symbols corresponding to a physical cell identity are sent from said radio base stations to said user equipments over a radio interface. Transmission gaps of reference symbols are inserted in the reference signal in order to perform a physical cell identity collision test. The user equipments are arranged to detect if any other radio base station is sending reference symbols corresponding to the same physical cell identity during the transmission gaps. Thereby a physical cell identity collision is detected.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: January 7, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Pal Frenger, Fredrik Gunnarsson
  • Patent number: 8620221
    Abstract: A base station device (10) communicates between a first terminal device and a second terminal device over the same channel by spatial multiplexing. The base station device (10) comprises an interference cancellation coefficient extractor (30) that extracts an interference cancellation coefficient from a signal received from the first terminal device to cancel interference on a propagation channel with the first terminal device in advance, and transmits a pilot signal that contains information related to the interference cancellation coefficient to the second terminal device.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: December 31, 2013
    Assignee: Panasonic Corporation
    Inventors: Takaaki Kishigami, Shozo Okasaka
  • Patent number: 8620222
    Abstract: A method for testing transmission modes of a wireless communication device. According to the method, a switching range is determined in a parameter space in a test device. The parameter of the parameter space describes the quality of transmission and influences a recommendation for a transmission mode to be adjusted in a device to be tested. The switching range is a subspace of the parameter space and contains at least one switching limit for the recommendation for the subsequent transmission mode to be adjusted. In a further step, random parameter points from the switching range are generated depending on a probability distribution which is defined for the switching range. A signal is generated for every parameter point and has a transmission mode determined by the parameter point and is transmitted to the device to be tested.
    Type: Grant
    Filed: March 20, 2009
    Date of Patent: December 31, 2013
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Andreas Pauly, Juergen Schlienz
  • Patent number: 8611937
    Abstract: A level detection part 221 detects the field intensity of airwaves broadcast by a desired station, and an AM component extraction part 222 and a level detection part 223 cooperate with one another in detecting the multipath noise level. When the field intensity of the airwaves broadcast by the desired station is high and also the multipath noise level is comparatively low, a filter setting part 229 determines filtering processing to be performed by an adaptive filter part 133 as being FIR type filtering processing. And the filter setting part 229 performs settings for FIR type filtering processing on the adaptive filter part 133. As a result, it is possible to enhance the reproduction quality of the broadcast content sent by the desired station that has been tuned.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: December 17, 2013
    Assignee: Pioneer Corporation
    Inventor: Hideyuki Kanno
  • Patent number: 8576937
    Abstract: A transmission apparatus in a Multiple Input Multiple Output (MIMO)-based wireless communication system. The transmission apparatus includes at least two antenna groups each having at least two antennas, wherein the antenna groups are spaced apart by a first distance and transmit antennas in each antenna group are spaced apart by a second distance which is shorter than the first distance. A channel coding and modulation unit channel-codes and modulates a desired transmission data stream. A precoding unit precodes the channel-coded and modulated signal separately for each antenna group and each antenna in the same antenna group. Thereafter, a transmission processing unit transmission-processes the output signal from the precoding unit.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: November 5, 2013
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jin-Kyu Han, Clerckx Bruno, Ju-Ho Lee
  • Patent number: 8565706
    Abstract: A RAKE receiver is adapted to receive input from at least a first and a second antenna (104a, 104b). The RAKE receiver comprises a despreading unit (303) adapted to allocate a number (Nf) of despreading fingers to a number of delay positions of a signal which is transmitted over a channel. The RAKE receiver further comprises a delay position selection unit (305) which estimates an antenna correlation (formula 1) between the at least first and second antenna (104a, 104b) and controls the despreading unit (303) according to a first strategy for allocating the number (Nf) of fingers if the antenna correlation (formula 1) is below a predetermined threshold, and according to a second strategy otherwise. The threshold (formula 2) is selected based on at least one of the following: number of available finger in the RAKE receiver (Nf), dispersion of the channel, range of direction of arrivals (??).
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: October 22, 2013
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Andres Reial
  • Patent number: 8509735
    Abstract: A correlating receiver is used (102) at a code division multiple access base transceiver station to monitor what may comprise possible multi-path versions of a transmission from an authorized communication system user to provide monitoring results. These monitoring results are then used (103) to detect when one of the possible multi-path versions of the transmission was sourced by an unauthorized communication system user while at least another of the possible multi-path versions of the transmission was, in fact, sourced by an authorized communication system user. In a preferred approach the unauthorized communication system user is then identified (104) as being a clone.
    Type: Grant
    Filed: August 25, 2005
    Date of Patent: August 13, 2013
    Assignee: Motorola Mobility LLC
    Inventors: Dean E. Thorson, William R. Bayer, Asif Z. Mehdi
  • Patent number: 8498669
    Abstract: Calibration for a transmit chain of a device transmitting information to multiple devices over wireless links and receive chains of the multiple devices receiving information over one of the wireless links utilizing a plurality of forward link channel estimates received from at least some of the plurality of devices and a plurality of reverse link channel estimates from the plurality of devices.
    Type: Grant
    Filed: April 4, 2006
    Date of Patent: July 30, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Ayman Fawzy Naguib, Avneesh Agrawal, Alexei Gorokhov
  • Patent number: 8498360
    Abstract: Advantage is taken of adaptive allocation techniques by intentionally creating multi-user diversity in an otherwise flat fading environment in order to improve system capacity. In one embodiment, multi-path distortion can be resolved to determine subscriber station (SS) diversity gain. Overall network capacity can be increased by allocating channel assignments to SSs within the network based on determined SS diversity gains. In one embodiment, intentional multi-path distortion is produced by transmitting a signal and a time-delayed version of the signal from a base station (BS).
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: July 30, 2013
    Assignee: Adaptix, Inc.
    Inventors: Manyuan Shen, Guanbin Xing
  • Patent number: 8498658
    Abstract: Techniques, apparatuses and systems for providing communications based on time reversal of a channel impulse response of a pulse in a transmission channel between a transmitter and a receiver to enhance reception and detection of a pulse at the receiver against various effects that can adversely affect and complicate the reception and detection of the pulse at the receiver.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: July 30, 2013
    Assignee: Ziva Corporation
    Inventors: David F. Smith, Anis Husain
  • Patent number: 8472877
    Abstract: A system and method for Interference Cancellation (IC). One aspect relates to iterative interference cancellation with iterative finger delay adaptation. The interference cancellation method comprises receiving multi-paths of a signal; and performing iterative interference cancellation to remove multi-path interference, wherein the performing iterative IC comprises estimating a Signal-to-Interference-plus-Noise Ratio (SINR) at each of a plurality of pre-determined rake receiver finger delays, and performing successive Channel Estimation (CE) and IC on rake receiver fingers according to their estimated SINRs, and wherein the CE of a next finger does not start until interference of a previous finger is removed from a sample buffer. The method may further comprise improving estimated rake receiver finger delay, and each iteration decreases the amount of interference observed by each finger.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: June 25, 2013
    Assignee: Qualcomm Incorporated
    Inventors: Jilei Hou, Joseph B. Soriaga, John Edward Smee, Jinghu Chen
  • Patent number: 8467462
    Abstract: To suppress effects produced on other terminals as much as possible, while obtaining the advantage of soft-combining. A multicarrier receiving apparatus that receives a packet comprised of at least a propagation path estimation symbol and a scrambled information symbol to demodulate, and has propagation path estimating sections 3-a and 3-b that respectively estimate propagation paths of radio signals transmitted from a plurality of transmission antennas, scramble multiplying sections 5-a and 5-b that respectively perform the same scrambling on propagation path estimation values output from the propagation path estimating sections 3-a and 3-b as scrambling provided in the information symbol on the transmission antennas sides, an adding section 3-c that adds scrambled propagation path estimation values, and a propagation path compensating section 7 that performs propagation path compensation of the information symbol included in the received packet using a signal output from the adding section 3-c.
    Type: Grant
    Filed: November 15, 2006
    Date of Patent: June 18, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasuhiro Hamaguchi, Minoru Kubota, Shimpei To, Shoichi Shitara, Kimihiko Imamura
  • Patent number: 8442502
    Abstract: Technologies are generally described for tracking an object. In some examples, a system may comprise a mobile phone and an augmented reality device. The mobile phone may be effective to receive a transmitted wave and to receive a reflected wave reflected off of an object. The mobile phone may be configured to determine a difference between the transmitted and the reflected wave, and generate first tracking data based on the determined difference. The augmented reality device may be adapted to receive the first tracking data and determine second tracking data regarding the location of the object based on the first tracking data. An image may be generated on a display based on the determined first and second tracking data.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: May 14, 2013
    Assignee: Empire Technology Development, LLC
    Inventor: Henry Leung
  • Patent number: 8396147
    Abstract: A MIMO transmitter and method for transmitting a group of sequential OFDM symbols on a downlink channel using a plurality of antennas is disclosed herein. Groups of OFDM subcarriers are individually modulated in accordance with spatial-frequency subcarrier modulation assignments to generate groups of symbol-modulated subcarriers, corresponding symbol-modulated subcarriers are combined for transmission on each of a plurality of spatial channels, and beamforming is performed on the combined symbol-modulated subcarriers for transmission over the spatial channels. The channel comprises a plurality of the groups of the OFDM subcarriers and the OFDM subcarriers within each group of subcarriers and within each group of sequential OFDM symbols have the same spatial-frequency subcarrier modulation assignments. The spatial-frequency subcarrier modulation assignments for each group are determined based on feedback by a receiver, which is determined from spatial channel characteristics of the spatial channels.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: March 12, 2013
    Assignee: Intel Corporation
    Inventors: John S. Sadowsky, Minnie Ho, Eric A. Jacobsen, Alexander A. Maltsev, Ali S. Sadri, Sumeet Sandhu
  • Patent number: 8378843
    Abstract: A telematics system in an asset network is provided. The telematics system includes one or more sensors configured to acquire data from multiple assets at different locations in the asset network. The telematics system also includes a transceiver configured to receive the data acquired from the one or more sensors. The telematics system further includes a data analysis system. The data analysis system includes a central data server configured to receive the data transmitted from the transceiver. The data analysis system also includes a processing circuitry configured to combine data, analyze combined data to detect trends, generate value added services based on the detected trends and distribute the value added services to multiple end users.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: February 19, 2013
    Assignee: General Electric Company
    Inventors: Patricia Denise Mackenzie, John William Carbone, Charles Burton Theurer, Joseph James Salvo, Joseph Edward Jesson