Sum Of Each Antenna Signal Patents (Class 342/383)
  • Patent number: 10454718
    Abstract: The present disclosure discloses a method used in a control node and an associated control node. The control node controls a serving radio node in a wireless communication network and the serving radio node serves one or more client radio nodes which are connected to the serving radio node via one or more links. The method includes determining to apply a sounding and sensing related configuration for the serving radio node in each link of the one or more links, if at least one link related parameter of the link satisfies a first predefined condition; and transmitting an enablement signal to the serving radio node, the enablement signal indicating enabling application of the sounding and sensing related configuration in the link. The present disclosure further discloses a method used in a serving radio node under control of a control node and an associated serving radio node. Moreover, the present disclosure discloses another method used in a control node and an associated control node.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: October 22, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Jinhua Liu, Gen Li
  • Patent number: 10270508
    Abstract: Methods and systems for communication between a network base station and a remote device are disclosed. Disclosed methods include providing, at a base station coupled to the network, a modulated signal to mixers in a retro-directive metamaterial antenna, and receiving an RF transmission beam from the remote device, at the retro-directive metamaterial antenna, and radiating from the antenna a modulated retro-directed beam, using mixer products, directed toward the remote device.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: April 23, 2019
    Assignee: Verizon Patent and Licensing Inc.
    Inventors: Donna L. Polehn, Fred Weisbrod
  • Patent number: 10224642
    Abstract: A modular antenna system and a method for signal processing using the modular antenna system are provided to overcome the missing scalability of conventional antenna arrays and improve the overall antenna array performance as well as facilitate individually replacing defective or not reliably operating radio-units or radio-subunits in modular antenna array systems and provide a calibration procedure which can be adapted to a scalable antenna array. The modular antenna system includes a base station, and at least one radio-unit comprising at least two radio-subunits. Each radio-subunit includes a radio-module and an antenna-module. The radio-module includes a digital signal-processing unit, at least a transceiver, a front-end and a power amplifier. The radio-subunits provide an identical architecture and are modularly connected together via a connector interface and each radio-subunit has an own IQ-input and an own IQ-output.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: March 5, 2019
    Assignee: AIRRAYS GMBH
    Inventors: Volker Aue, Michael Grieger, Albrecht Fehske
  • Patent number: 10101445
    Abstract: A system for signal processing is provided that obviates the use of prior-knowledge, such as synthetic aperture radar (SAR) imagery, in time compressed signal processing (i.e. it can be knowledge unaided). The knowledge-unaided power centroid (PCKU) is found by evaluating a covariance matrix RSCM for its moments mi. Because RSCM uses a sample signal, rather than SAR data, the power centroid PCKU may be found without needing SAR data.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: October 16, 2018
    Assignee: Research Foundation of the City University of New York
    Inventor: Erlan Feria
  • Patent number: 9954587
    Abstract: A technology for an enhanced node B (eNB) that is operable to perform beamforming using multiple-input multiple-output (MIMO) in a cellular network. One or more user equipment (UEs) can be configured to use a same or different multiple port (multi-port) channel state information reference signal (CSI-RS) pattern. Feedback reports can be received from the one or more UEs associated with the multi-port CSI-RS pattern at the eNB. A UE-specific or more UEs at the eNB using the feedback report from the one or more UEs.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: April 24, 2018
    Assignee: Intel IP Corporation
    Inventors: Yuan Zhu, Qinghua Li, Xiaogang Chen, Hooman Shirani-Mehr
  • Patent number: 9917658
    Abstract: Embodiments relate to a concept for testing a transceiver device (302) which may be coupled to an antenna array (312), the antenna array (312) comprising at least two an antenna elements. It is provided (204) spatial radiation characteristics of an antenna reference or the antenna array (312) and at least one antenna element of the antenna array. It is determined (206), based on the spatial radiation characteristics and a predefined test quantity for a spatially unaware receiver or transmitter test of the transceiver device (302), a spatially aware test quantity for testing the transceiver device (302) using the spatially unaware receiver or transmitter test based on the determined spatially aware test quantity.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: March 13, 2018
    Assignee: Alcatel Lucent
    Inventors: Teck Hu, Thomas Bitzer, Henning Martens, Kurt Weese, Thomas Weese, Martina Weese
  • Patent number: 9787386
    Abstract: An access point of a wireless communication network forms beams by applying a weightset for a beamforming weights matrix to signal streams. The Equivalent Isotropic Radiated Power (EIRP) that is emitted from an array of antenna elements at the access point is controlled by calibrating the transmission phase and gain of a respective transmit chain for each antenna element, providing a polar radiation model for an antenna element of the array, and determining a weightset for the weighting matrix subject to a constraint that a maximum total EIRP for the beams in combination in any azimuth direction is maintained within a predetermined EIRP limit, based at least on a spatial separation of the antenna elements, the polar radiation model and the calibrated transmission phase and gain of each respective transmit chain.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: October 10, 2017
    Assignee: Cambium Networks Ltd
    Inventor: Peter Strong
  • Patent number: 9750027
    Abstract: A method and an apparatus for operating a transmitter in a millimeter wave communication system is provided. In the method, information of a common and/or control channel is mapped to a dedicated frequency region of a dedicated Radio Frequency (RF) path. Data is mapped to a common frequency region for a common RF path.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: August 29, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Tae-Young Kim, Ji-Yun Seol, Hyun-Kyu Yu, Su-Ryong Jeong
  • Patent number: 9577343
    Abstract: A method and apparatus configures a beamforming coefficient based on the signal strength information without collecting channel information by adjusting the phase of the antennas through random perturbation. An antenna control method of a base station in a wireless communication system using a beamforming technique includes measuring nth received signal strength at nth phase of at least one receive antenna, measuring (n+1)th received signal strength at (n+1)th phase shifted randomly from the nth phase in one of forward and backward directions, and configuring a beamforming coefficient with the phase at which the received signal strength is greatest through comparison of received signal strengths. The random perturbation-based beamforming method and apparatus of the present disclosure is capable of configuring the beamforming coefficient appropriate for the normal cellular environment using a plurality analog array antenna without channel estimation overhead.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: February 21, 2017
    Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Jeongho Park, Jiyun Seol, Yonghoon Lee, Minhyun Kim, Sungjin Kim, Uitae Hwang
  • Patent number: 9484976
    Abstract: An assembly, a method of operating the assembly and antennas for use in the assembly, where two or more antennas (16, 18) each is adapted to output an output signal with one of two or more characteristics, only one antenna outputting a signal with a predetermined characteristic, such as a non-zero amplitude, whereby the output signals from the antennas may simply be added/summed while enabling selection of the signal with the predetermined characteristic using e.g. a simple filter.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: November 1, 2016
    Assignee: Thrane & Thrane A/S
    Inventor: Svend Stave
  • Patent number: 9443503
    Abstract: The present invention compensates output variability caused by the difference in the performance of and the individual difference between converter devices when processing the signals inputted by means of a converter device, and performs highly-accurate signal processing. The present invention is provided with an input means which inputs an input signal through a converter device, a memory means which stores a minimum value of a reference signal inputted through a reference converter device, a comparison means which compares a minimum value of the input signal and the minimum value of the reference signal, and a modification means which modifies the input signal in accordance with the comparison result of the comparison means.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: September 13, 2016
    Assignee: NEC CORPORATION
    Inventor: Akihiko Sugiyama
  • Patent number: 9341698
    Abstract: A radio interference locator includes a detector circuit having a directional antenna defining a boresight along which electromagnetic radiation is preferentially accepted. The antenna is coupled to a signal detector which generates an electrical signal from a selected radio-frequency (RF) spectral band of the electromagnetic radiation accepted by the antenna. A processor determines the boresight direction at prescribed sample times as well as an associated signal characteristic, such as a signal level of the electrical signal, measured at the sample times. Data are presented that indicate the signal characteristic for the associated boresight direction at each of the sample times. A mobile platform connects the detector circuit and the processor so that they can be freely oriented in space in fixed mechanical formation by a single human operator.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: May 17, 2016
    Assignee: Exelis Inc.
    Inventor: Randell S. Sierens
  • Patent number: 9258049
    Abstract: The communication device includes: a phased array antenna having a plurality of antenna elements arranged on a plane for receiving signals transmitted from one or more transmitting devices; a signal converter for combining signals received through antenna elements for each sub-array and converting the combined signal for each sub-array into a baseband signal, the each sub-array being grouped from the plurality of antenna elements; a signal processor for decoding playback data based on respective baseband signals for sub-arrays in each resource block and detecting an error of the decoded playback data; and an orientation controller for controlling orientation of the phased array antenna based on the base band signals for the sub-arrays and a signal of a resource block with the playback data having no error.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: February 9, 2016
    Assignee: Samsung Electronics Co., Ltd
    Inventor: Masaaki Fujii
  • Patent number: 9121923
    Abstract: A Wide Area Sensor Network (WASN) is disclosed that utilizes wideband software defined radios (SDRs) to monitor RF energy over a wide frequency range, detect when critical frequencies are being jammed or otherwise interfered with, and locate the source of the interference so that the interference can be eliminated. The WASN may use one or more geolocation techniques In addition, the WASN may detect and locate unauthorized transmitters as well as estimate the transmitted power of authorized transmitters to assure they are not transmitting more power than authorized.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: September 1, 2015
    Assignee: TruePosition, Inc.
    Inventors: Jeffrey F. Bull, Matthew L. Ward
  • Patent number: 9113426
    Abstract: In a method and a device a time-varying back-off value is used whereby differences in cell load can be taken into account for a restricted time-period during which the information is believed to be valid. Also, other time-varying variables of interest for the initial DPCCH power setting of the secondary earner can be taken into account when setting the back-off value.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: August 18, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Johan Hultell, Johan Bergman
  • Patent number: 9065552
    Abstract: A method of transmitting a signal based on multi-stream CPDMA may include: allocating a plurality of data symbols to each of a plurality of data streams based on a frequency hopping pattern; applying a DFT function and a M-times repetition function to the data symbol allocated to the each of the plurality of data streams; applying a spectral weighting vector to the each of the plurality of data streams applying the DFT function and the M-times repetition function; and generating the signal based on the multi-stream CPDMA by performing an IDFT function and a cyclic prefix adding procedure with respect to the plurality of data streams to which the spectral weighting vector is applied, in which the spectral weighting vector is a vector for determining a frequency band in which the each of the plurality of data streams is used.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: June 23, 2015
    Assignees: LG ELECTRONICS INC., POSTECH ACADEMY-INDUSTRY FOUNDATION
    Inventors: Ki Jun Kim, Joon Ho Cho, Yeo Hun Yun, Jeong Ho Yeo, Min Uk Kim, Eun Ae Lee, Ju Bum Kim
  • Patent number: 9048915
    Abstract: A method and apparatus for splitting signals received via a plurality of antennas. A signal split apparatus of the present disclosure includes a first antenna which receives a first input signal, a second antenna which receives a second input signal, a first phase shifter which shifts phase by applying a first modulation frequency to the first input signal, a second phase shifter which shifts phase by applying a second modulation frequency to the second input signal, a summer which sums the phase-shifted first and second input signals, and an analog-digital converter which converts the summed signal to a digital signal, wherein the first and second modulation frequencies are different from each other. The signal split apparatus and method of the present disclosure is capable of splitting signals efficiently.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: June 2, 2015
    Assignees: SAMSUNG ELECTRONICS CO., LTD, KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Sanghyouk Choi, Dongmin Park, Heeseong Yang, Joohwan Chun
  • Patent number: 9024818
    Abstract: Communication systems and methods are disclosed. A number of interference sources are obtained based on received signals. A communication is performed using a plurality of antennas and a transmission directivity of the antennas is controlled when transmitting signals. At least null-steering from among null-steering and beam-forming is performed in relation to the transmission directivity of the antennas, when the number of interference sources is less than a first threshold value. Only the beam-forming is performed from among the null-steering and the beam-forming in relation to the transmission directivity of the antennas, when the number of interference sources is greater than the first threshold value.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: May 5, 2015
    Assignee: Kyocera Corporation
    Inventor: Tetsuo Okamoto
  • Patent number: 8902840
    Abstract: An approach is provided for supporting transmission in a multi-input-multi-output (MIMO) communication system including a plurality of terminals. A preamble portion of a frame is transmitted by a multiple transmit antennas of a hub using Orthogonal Frequency Division Multiplexing (OFDM) to the terminals over a channel, wherein each of the terminals determines a characteristic of the channel with respect to the transmit antennas as feedback information. The hub receives the feedback information from the terminals. The hub selects, according to the feedback information, a subset of the antennas for transmission of a remaining portion of the frame to the terminal.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: December 2, 2014
    Assignee: The DIRECTV Group, Inc.
    Inventors: Jian Song, Khalid Karimullah
  • Patent number: 8779979
    Abstract: Described herein is a multi-antenna signal receiving device that includes a plurality of reception antennas that is capable of maximizing a diversity gain while eliminating a multi-path interference (MPI). The device receives a first received signal of a first antenna that includes components corresponding to a plurality of first paths and the device receives a second received signal of a second antenna that includes components corresponding to a plurality of second paths. The multi-antenna signal receiving device detects a component corresponding to a first path among the plurality of first paths, and a component corresponding to a second path among the plurality of second paths.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: July 15, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Tetsuhiko Miyatani
  • Patent number: 8773307
    Abstract: A novel wide null forming system achieves both wide bandwidth and beam width null through employing an antenna array to receive and transmit signals to which a complex null weight vector, calculated by perturbation program, is applied. The novel wide null forming system includes a multiple-element antenna array for receiving or transmitting signals. Multiple conditioning units matching the number of elements is present to condition the signals for proper reception and analysis, after which a series of complex multiplier processors adds complex weights. After being weighted each constituent beam is combined in an adding processor to form one composite beam for use by the user.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: July 8, 2014
    Assignee: Spatial Digital Systems, Inc.
    Inventors: Donald C. D. Chang, Yulan Sun, Yuanchang Liu
  • Patent number: 8774196
    Abstract: The present disclosure relates to an active antenna array for a mobile communications network. The active antenna comprises a base band unit coupled to a base station, a plurality of transceiver units and at least one link. The plurality of transceiver units is terminated by at least one antenna element. The at least one link couples individual ones of the plurality of transceiver units to the base band unit 10. The at least one link is a digital link and is adapted to relay an individual transmit signal concurrently and in synchronisation with a transmit clock signal. The present disclosure further teaches a method for relaying radio signals in a mobile communications network. The present disclosure further relates to a computer program enabling a computer to manufacture the active antenna array of the present disclosure and to execute the method of relaying radio signal in a mobile communications system.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: July 8, 2014
    Assignee: Kathrein-Werke KG
    Inventors: Georg Schmidt, Johannes Schlee
  • Patent number: 8755367
    Abstract: A reception system including a receiver of superheterodyne type coupled to a processing means, the receiver including N antennas. Said receiver includes: N translation means, each being able to frequency translate signals delivered by the antenna considered, from a frequency sub-band of the span of interest to a restricted frequency band, and to frequency multiplex the signals belonging to said frequency sub-band; N first intermediate frequency bandpass filters, of bandwidth equal to said restricted frequency band, respectively coupled at the output of each translation means, and able to filter the translated and multiplexed signals; a coupling means able to sum the N filtered signals so as to deliver the set of summed signals via N outputs.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: June 17, 2014
    Assignee: Thales
    Inventors: Daniel Jahan, Cedric Cornu
  • Patent number: 8643543
    Abstract: A phased array antenna system with intermodulation beam nulling device includes nulling phase shifters.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: February 4, 2014
    Assignee: The Aerospace Corporation
    Inventors: James P. McKay, David A. Ksienski
  • Patent number: 8614644
    Abstract: Embodiments of the invention provide systems and methods for systems and methods for adaptively canceling interfering signals generated by a transmission antenna. Under one aspect, a system includes: an auxiliary antenna co-located with the main antenna, the auxiliary antenna configured to transmit an auxiliary signal to the victim antenna; a sensing antenna located on a line-of-sight path between the transmission antenna and the victim antenna, the sensing antenna configured to receive a composite of the interference and the auxiliary signal, and to output a first signal based on the received composite; a controller comprising an input coupled to the sensing antenna and configured to receive the first signal, the controller being configured to adjust at least one of an amplitude, a phase, a polarization, and a frequency characteristic of the auxiliary signal based on the first signal so as to reduce the composite of the interference and the auxiliary signal received by the sensing antenna.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: December 24, 2013
    Assignee: The Aerospace Corporation
    Inventors: Robert B. Dybdal, Keith M. SooHoo, Samuel J. Curry
  • Patent number: 8599861
    Abstract: The present disclosure teaches an active antenna array for a mobile communications network. The active antenna array comprises a base band unit, a plurality of transceiver units terminated by at least one antenna element; and at least one link. The link couples the individual ones of the plurality of transceiver units to the base band unit. The link is a digital link and is adapted to relay a payload signal at a selectable payload rate. The digital link is further adapted to relay a timing signal at a fixed timing rate, when the timing signal is embedded in the payload at a selectable payload rate. The present disclosure further teaches a method for relaying radio signals and a computer program for manufacturing the active antenna array and for executing the method.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: December 3, 2013
    Assignee: KATHREIN-Werke KG
    Inventors: Georg Schmidt, Johannes Schlee
  • Patent number: 8582694
    Abstract: The present invention provides a high-performance adaptive digital receiver with adaptive background control that optimizes the performance in rapidly changing signal environments and provides 3.6 GH; instantaneous bandwidth, SFDR>90 dB, SNR=66 dB, with dynamic digital channelization. The receiver takes advantage of several levels of adaptivity that conventional approaches do not offer. In addition to a dynamic digital channelizer that is adaptively tuned based on detected signals, the present invention employs a powerful software reconfigurable digitizer that is adaptively optimized for the current signal environment to control important receiver parameters such as bandwidth, dynamic range, resolution, and sensitivity.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: November 12, 2013
    Inventors: Scott R. Velazquez, Rich J. Velazquez
  • Patent number: 8508410
    Abstract: Adaptive antenna beamforming may involve a maximum signal-to-noise ratio beamforming method, a correlation matrix based beamforming method, or a maximum ray beamforming method. The adaptive antenna beamforming may be used in a millimeter-wave wireless personal area network in one embodiment.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: August 13, 2013
    Assignee: Intel Corporation
    Inventors: Alexander Maltsev, Roman Maslennikov, Alexey Khoryaev
  • Patent number: 8446318
    Abstract: Methods, devices, and systems for controlling a beamforming antenna with reconfigurable parasitic elements is provided.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: May 21, 2013
    Inventors: Shirook Ali, James Warden
  • Patent number: 8401133
    Abstract: A multi-antenna system using adaptive beamforming includes a phase shift unit, a signal combination unit, a frequency down-converter, and an analog-to-digital (A/D) converter, and a beamforming control unit. The phase shift unit includes a plurality of phase shifters which shift the phases of signals received from a plurality of antennas. The signal combination unit combines phase-shifted signals output from the plurality of phase shifters. The frequency down-converter down-converts a signal output from the signal combination unit into a baseband signal. The A/D converter converts the baseband signal into a digital signal. The beamforming control unit searches for a weight vector higher than a preset threshold signal-to-noise ratio (SNR) when a reception SNR of the digital signal output from the A/D converter is lower than the threshold SNR, and changes a currently set weight vector into the searched weight vector to provide to the phase shift unit.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: March 19, 2013
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Chul Gyun Park, Young Chai Ko, Kyung Tae Jo, Joun Sup Park
  • Patent number: 8289901
    Abstract: Techniques are provided to determine channel assignments for wireless access point (AP) devices in a wireless local area network (WLAN). From each of a plurality of AP devices operating at least one of a plurality of channels in the WLAN, wireless activity data is received that represents activity in each channel associated with signals of devices operating in the WLAN and associated with signals and energy from devices that are not operating in the WLAN as detected by the AP devices by receiving radio frequency energy in each of the plurality of channels.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: October 16, 2012
    Assignee: Cisco Technology, Inc.
    Inventors: Predrag Tosic, Sandeep Jay Shetty, Douglas Chan
  • Patent number: 8254988
    Abstract: A first device transmits a training signal with a fixed beam pattern, a second device receives the training signal while scanning a beam direction, and then it obtains first AWVs each having a main beam or sub-beam beam direction in an incoming direction in the second device. Next, the first device transmits a training signal while scanning a beam direction, the second device receives the training signal with a fixed beam pattern, and then it obtains second AWVs each having a main beam or sub-beam direction in an emitting direction in the first communication device. The roles of these two devices are interchanged and similar processes are performed in order to obtain third and fourth AWVs, and then one of first AWV combinations from first and second AWVs and one of second AWV combinations from third and fourth AWVs are used for wireless communication between these devices.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: August 28, 2012
    Assignee: NEC Corporation
    Inventors: Kenichi Hosoya, Kenichi Maruhashi, Naoyuki Orihashi
  • Patent number: 8243706
    Abstract: An approach is provided for supporting transmission in a multi-input-multi-output (MIMO) communication system including a plurality of terminals. A preamble portion of a frame is transmitted by a multiple transmit antennas of a hub using Orthogonal Frequency Division Multiplexing (OFDM) to the terminals over a channel, wherein each of the terminals determines a characteristic of the channel with respect to the transmit antennas as feedback information. The hub receives the feedback information from the terminals. The hub selects, according to the feedback information, a subset of the antennas for transmission of a remaining portion of the frame to the terminal.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: August 14, 2012
    Assignee: The DIRECTV Group, Inc.
    Inventors: Jian Song, Khalid Karimullah
  • Patent number: 8224271
    Abstract: An electronic device (200,300) comprising an antenna arrangement with first and second antenna groups with first (122, 142) and a second (124, 144) radiation elements. The first and second radiation elements in each group have first and second respective polarizations and gain, and said groups also comprise a beam forming network (126, 146) connected to the radiation elements of the group and to an output selector (150). The beam forming network (126, 146) of each antenna group uses the radiation elements (122, 124; 142, 144) in the group to create a radiation pattern (127, 147) with a polarization which is a composite of the first and second polarizations of the elements in the group, so that a first (127) and a second (147) radiation pattern of composite polarization is created. The output selector (150) selects or combines signals received by the two antenna groups as its output.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: July 17, 2012
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Patrik Persson, Martin Nils Johansson, Anders Stjernman, Sven Anders Gösta Derneryd, Jonas Fridén
  • Publication number: 20120176272
    Abstract: It is an object of the present invention to provide a system with which 3-dimensional position can be accurately measured. Plural UWB transmitter-receivers (1), periodically transmitting PN codes of M system and preliminarily disposed on known positions are provided, a server (3) to synchronize the plural UWB transmitter-receivers (1) is provided, an RF tag (T), attached to a moving object (20) as to receive signals (I0) synchronously and periodically transmitted from the UWB transmitter-receivers (1) and reflect the signals (I0) adding inherent tag recognition signal, is provided, and the UWB transmitter-receiver (1) is composed as to obtain the distance to the moving object (20) attached with the RF tag (T) by synchronous summation and correlative calculation of the PN codes of M system reflected by the RF tag (T).
    Type: Application
    Filed: April 26, 2010
    Publication date: July 12, 2012
    Inventors: Seiichiro Hirata, Nobuo Nakajima, Shogo Ida, Harumasa Hojo
  • Patent number: 8126504
    Abstract: A method of controlling a wireless communication system including a plurality of communication devices is disclosed. In the method, firstly, one of the communication devices establishes a fixed beam pattern and transmits a training signal, and another communication device receives the training signal while scanning a beam direction by changing the AWVs of an antenna array. Next, it obtains a data string describing a relation between an incoming direction and a received-signal characteristic at the other communication device based on a reception result of the training signal. Then, it obtains first AWVs with which a beam is formed in a plurality of incoming directions of the received signal based on the data string. The roles of these two communication devices are interchanged and similar processes are performed in order to obtain second AWVs, and then one of AWV combinations combining first and second AWVs are used for wireless communication between these communication devices.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: February 28, 2012
    Assignee: NEC Corporation
    Inventors: Kenichi Hosoya, Kenichi Maruhashi, Naoyuki Orihashi
  • Patent number: 8115678
    Abstract: According to one embodiment, generating an array correlation matrix includes interfacing with an antenna system that has antenna elements. The antenna elements receive incoming signals, and each antenna generates a response signal in response to receiving the signals. The following is performed for a number of iterations to yield summed signals: controlling weights of the antenna elements to weight the response signals; and receiving a summed signal comprising a sum of the weighted signals. An array correlation matrix is generated from the summed signals.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: February 14, 2012
    Assignee: Raytheon Company
    Inventor: Carlos R. Costas
  • Patent number: 8111191
    Abstract: Embodiments of the invention include a method to control an antenna pattern of a wideband array antenna wherein a wideband array antenna unit comprising the wideband array antenna and transforming means is accomplished. Embodiments of the invention further include the corresponding wideband array antenna unit and transforming means arranged to control an antenna pattern of an antenna system. The separation between antenna elements in the wideband array antenna can be increased to above one half wavelength of a maximum frequency within a system bandwidth when the array antenna is arranged to operate with an instantaneously wideband waveform.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: February 7, 2012
    Assignee: Saab AB
    Inventor: Kent Falk
  • Patent number: 8106827
    Abstract: An adaptive array control device is described. The adaptive array control device includes a first array processing section and a second array processing section in which phase responses are almost opposite with respect to a target signal and a signal incoming from another direction. The adaptive array control device further includes a control signal generation section, and a control section. The control signal generation section calculates a control signal using output signals of the first array processing section and the second array processing section. The control section controls speed and accuracy of parameter adjustment in adaptive array processing using the control signal. An adaptive array controlling method, and a computer readable recording medium storing an adaptive array controlling program are also described.
    Type: Grant
    Filed: April 12, 2007
    Date of Patent: January 31, 2012
    Assignee: NEC Corporation
    Inventor: Akihiko Sugiyama
  • Patent number: 8013792
    Abstract: Method and apparatus for minimizing antenna backside signal response and ambiguity in low frequency applications, particularly low frequency synthetic aperture radar (SAR). Various time delay elements are selectably switched into the signal path so as to cause a null to be placed in the antenna response pattern in the direction of undesired radar returns. The means for selectably switching may be dithered so as to introduce modulation onto the undesired radar return to aid in the discrimination and removal of the undesired radar return from the SAR image during post processing.
    Type: Grant
    Filed: August 6, 2009
    Date of Patent: September 6, 2011
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Daniel McCarthy, Dean Paschen, Lary Eichel, Frank Pratt
  • Patent number: 7970073
    Abstract: Provided is an apparatus and method for transmitting/receiving data in a multi-user multi-antenna communication system. A data transmitting apparatus and method computes a RX filter or a TX filter for each user receiver in an improved scheme, selects a codebook correlating with the computed TX filter or the computed RX filter, and transmits an index of the selected TX filter codebook or an index of the selected RX filter codebook to a receiver. A data receiving apparatus and method receives the codebook index and detects a corresponding RX filter from the codebook by using the received codebook index.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: June 28, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Chan-Byoung Chae, David Mazzarese, Sung-Ryul Yun
  • Patent number: 7912507
    Abstract: A base transceiver station (BTS) identifies the number of currently connected antenna units by receiving a signal to which 1 is added in each antenna unit via a signal line (16) connecting the antenna units (AU1 to AUn) in series. The target output power of each antenna unit, which is obtained by dividing the total target output power of the antenna units by the number of currently connected antenna units, is passed to each antenna unit via a signal line (14) connecting the antenna units in series. Each antenna unit controls the gain of a variable gain amplifier so that its output power becomes equal to the target output power.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: March 22, 2011
    Assignee: Fujitsu Limited
    Inventors: Takahito Hashigami, Toshiaki Funakubo
  • Patent number: 7859461
    Abstract: A method for detecting a plurality of navigation beacon signals by using either two antennas or a synthetic aperture antenna for receiving a plurality of distinct measurements, and combining the plurality of distinct measurements using a plurality of antenna weight components to form an interference cancellation beam. In one embodiment, the plurality of antenna weight components is determined by eigenvalue processing. In another embodiment, the plurality of antenna weight components is determined by simplified processing. In another aspect, a single antenna is used for receiving an originally received measurement. A copy of the originally received measurement is made and processed to achieve the proper time delay to emulate spatial diversity. The originally received measurement and the processed copy are combined to form an interference cancellation beam.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: December 28, 2010
    Assignee: QUALCOMM Incorporated
    Inventors: Michael James Wengler, Ahmad Jalali
  • Patent number: 7825857
    Abstract: An adaptive antenna array control system and associated method is provided for continuously and automatically assigning resources to either protect against strong interferers or to shade a spatial region, reducing gain in that spatial region, to protect against potential low power interference, thus providing improved adaptive interference cancellation system performance with limited resources. The Array biasing system is provided as an element of an adaptive antenna array control loop.
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: November 2, 2010
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Raymond J. Lackey, Martin E. Somin, Sondra Somin, legal representative
  • Patent number: 7800539
    Abstract: A wide-angle null-fill antenna with no null in the depression angle range, an omni antenna using the same, and radio communication equipment. A null-fill antenna comprises a first antenna array including antenna elements arranged with a prescribed point as the center, and a second antenna array having amplitude characteristics substantially equal to those of the antenna elements forming the first antenna array. The first antenna array is excited so that the excitation amplitude distribution is to have symmetry with respect to the prescribed point, while the excitation phase distribution is to have point symmetry with respect to the prescribed point. The phase center of the first antenna array is substantially coincident with that of the second antenna array.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: September 21, 2010
    Assignee: NEC Corporation
    Inventor: Norihiko Oomuro
  • Patent number: 7786948
    Abstract: An array antenna with an embedded subaperture includes an array of radiator elements. The array includes a subaperture of one or a group of the radiator elements. A main receive channel is coupled to at least some of the radiator elements by a feed network. An RF power dividing network is connected in a signal path between the subaperture and the special use receive channel, and is adapted to allow at least most of the RF energy from the subaperture to pass to the special use receiver channel while diverting a small amount of energy to the main receive channel. The array includes circuitry for introducing an amplitude taper to signals received from the array of radiator elements, so that some of the signals from the radiator elements are attenuated to achieve the amplitude taper.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: August 31, 2010
    Assignee: Raytheon Company
    Inventors: Kenneth M. Webb, Timothy D. Keesey
  • Patent number: 7629927
    Abstract: A method for forming a beam in an array antenna to orient a null point of the array antenna to a mobile station which acts as interference, includes the step of: forming a beam in such a manner that, based on a moving speed of the mobile station acting as interference, a moving direction and a distance between the array antenna and the mobile station, a signal power to interference power ratio may be equal, regardless of the distance, between before and after movement when the mobile station acting as interference moves.
    Type: Grant
    Filed: August 25, 2004
    Date of Patent: December 8, 2009
    Assignee: Fujitsu Limited
    Inventors: Eizou Ishizu, Makoto Yoshida
  • Patent number: 7565172
    Abstract: An adaptive antenna receiver whose follow-up performance is improved with respect to the angle change of the arrival direction of a desired signal. An antenna weight adaptive update section (11-1) adaptively updates the antenna weight according to a signals received by each antenna element and an error signal obtained from a desired signal corrected based on transmission channel estimation. An antenna weight direction constraint section (12-1) performs the constraint process for the antenna weight obtained by the antenna weight adaptive update section (11-1) to maintain the beam gain constant in the arrival direction of the desired signal. A beamformer (2-1) receives the desired signal through an array antenna using the antenna weight which has undergone the constraint process performed by the antenna weight direction constraint section (12-1).
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: July 21, 2009
    Assignee: NEC Corporation
    Inventor: Shousei Yoshida
  • Patent number: 7557752
    Abstract: There is provided a communication method including: generating a channel estimated value for each antenna by performing channel estimation using a received signal by each antenna; calculating reception weights by which subcarriers assigned the received signal of each antenna are to be multiplied using a set of the channel estimated values; calculating a reception weight time profile for each antenna by converting the reception weights calculated for each antenna to data on a time domain; generating a transmission weight time profile for each antenna by extracting a certain section of each reception weight time profile; calculating transmission weights by which subcarriers assigned a transmission signal for each antenna are to be multiplied by converting each transmission weight time profile to data on a frequency domain; and multiplying subcarriers assigned the transmission signal for each antenna by the transmission weights of each antenna and transmit multiplied subcarriers through each antenna.
    Type: Grant
    Filed: August 10, 2007
    Date of Patent: July 7, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Koichiro Ban
  • Patent number: 7492749
    Abstract: An approach is provided for supporting transmission in a multi-input-multi-output (MIMO) communication system including a plurality of terminals. A preamble portion of a frame is transmitted by a multiple transmit antennas of a hub using Orthogonal Frequency Division Multiplexing (OFDM) to the terminals over a channel, wherein each of the terminals determines a characteristic of the channel with respect to the transmit antennas as feedback information. The hub receives the feedback information from the terminals. The hub selects, according to the feedback information, a subset of the antennas for transmission of a remaining portion of the frame to the terminal.
    Type: Grant
    Filed: May 19, 2004
    Date of Patent: February 17, 2009
    Assignee: The DIRECTV Group, Inc.
    Inventors: Jian Song, Khalid Karimullah