Including Directive Communication System Patents (Class 342/367)
  • Publication number: 20110316744
    Abstract: By effectively utilizing the beam pattern used at the time of the last communication, a directional link can be efficiently established, thereby reducing overhead. When establishing a link, a communication apparatus 100 transmits a preparation frame by using the last used transmit beam pattern, thereby efficiently establishing a directional link and reducing overhead. Also, when establishing a link, the communication apparatus 100 uses the last used receive beam pattern to receive a preparation frame whose transmission timing is known, thereby efficiently establishing a directional link and reducing overhead.
    Type: Application
    Filed: February 9, 2010
    Publication date: December 29, 2011
    Inventors: Yuichi Morioka, Takushi Kunihiro, Kazuyuki Sakoda, Ryo Sawai
  • Patent number: 8081110
    Abstract: Certain aspects of the present disclosure relate to a method for association in contention access periods and to a method for multi-cycle training in channel time allocation periods.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: December 20, 2011
    Assignee: QUALCOMM Incorporated
    Inventor: Ismail Lakkis
  • Patent number: 8064828
    Abstract: An embodiment of the present invention provides an apparatus, comprising at least one transceiver operable in a wireless personal area network (WPAN), wherein the at least one transceiver is equipped with the directional antennas adapted to point substantially vertically towards a horizontal reflecting surface, such as a ceiling, and with an antenna pattern specifically designed to control the interference levels.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: November 22, 2011
    Assignee: Intel Corporation
    Inventors: Alexander Maltsev, Alex Kesselman, Roman Maslennikov, Alexey Khoryaev, Alexey Sevastyanov
  • Publication number: 20110279319
    Abstract: To enable high-speed learning of an antenna directionality to be used for millimeter-wave communication, there is provided a communication device including a first radio communication unit capable of radio communication in accordance with a first communication method, and a second radio communication unit capable of radio communication in accordance with a second communication method using a higher frequency band than the first communication method, in which, upon receiving an instruction signal instructing to learn a beam directionality, the first radio communication unit determines a reception start time point of a beam reference signal based on the instruction signal, and the second radio communication unit starts reception of the beam reference signal from the reception start time point determined by the first radio communication unit and determines a parameter value for specifying an optimum beam pattern based on the received beam reference signal.
    Type: Application
    Filed: January 18, 2010
    Publication date: November 17, 2011
    Inventors: Hiroaki Takano, Yuichi Morioka, Takushi Kunihiro
  • Patent number: 8054225
    Abstract: A method and device for wireless directional beam-forming transmission. The method for wireless directional beam-forming transmission between a first device and a second device comprises conducting one or more omni-directional transmissions between the first device and a third device; conducting one or more omni-directional transmissions between the second device and the third device; and determining directional information for directional beam forming transmissions between the first and second devices based on the omni-directional transmissions.
    Type: Grant
    Filed: February 5, 2007
    Date of Patent: November 8, 2011
    Assignee: Panasonic Corporation
    Inventors: Hong Cheng Michael Sim, Taisuke Matsumoto, Hiroshi Doi
  • Patent number: 8054223
    Abstract: Certain aspects of the present disclosure relate to a method for association in contention access periods and to a method for multi-cycle training in channel time allocation periods.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: November 8, 2011
    Assignee: QUALCOMM Incorporated
    Inventor: Ismail Lakkis
  • Patent number: 8026849
    Abstract: A system (105) determines a power level for transmitting to a neighboring node in a wireless network. The system (105) receives a message indicating a three-dimensional position and orientation of the neighboring node and a type of directional antenna of the neighboring node that transmitted the message. The system (105) determines the power level for transmitting to the neighboring node based on the three-dimensional position and orientation of the neighboring node and the type of the directional antenna.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: September 27, 2011
    Assignee: Raytheon BBN Technologies Corp.
    Inventors: Jason Keith Redi, Eric Gustav Brett, William Dugald Watson, Jr.
  • Patent number: 8013790
    Abstract: A method for establishing a wireless communication link between a first communication device having a beam antenna to be steered to different positions and a second communication device. The method includes transmitting a link request signal from the first communication device to the second communication device via the beam antenna. The link request signal includes information relating to a current position of the beam antenna. The method further includes obtaining, in case the link request signal is received in the second communication device, channel quality information representative of a current transmission path.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: September 6, 2011
    Assignee: Sony Deutschland GmbH
    Inventors: Masahiro Uno, Zhaocheng Wang
  • Patent number: 8009096
    Abstract: A method, system and apparatus for determining at least one relative characteristic of a transmit diversity transmitter based on at least one quality indicator based on signals received on the plurality of antennas. In some embodiments of the invention, the relative characteristic may be a relative power or amplitude ratio and/or a phase difference between the signals transmitted on the different antennas.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: August 30, 2011
    Assignee: Magnolia Broadband Inc.
    Inventors: Haim Harel, Kenneth Kludt, Yair Karmi
  • Patent number: 8010062
    Abstract: A multiple frequency antenna array includes a first antenna circuit and a second antenna circuit. The first antenna circuit has a first radiation pattern and is tuned to a first carrier frequency. The first antenna circuit transmits a first representation of a radio frequency (RF) signal at the first carrier frequency, where the first carrier frequency corresponds to a carrier frequency of the RF signal and a first frequency offset. The second antenna circuit has a second radiation pattern and is tuned to a second carrier frequency. The second antenna circuit transmits a second representation of the RF signal at the second carrier frequency, where the second carrier frequency corresponds to the carrier frequency of the RF signal and a second frequency offset.
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: August 30, 2011
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8009507
    Abstract: A system for an adaptable aperture planar array for maintaining source resolution is provided. The system includes a first nested array defining a first aperture responsive to a first range of frequencies. The first aperture is sized based on an angle between the array and the source, and includes a first subset of sensor elements. The system includes a second nested array defining a second aperture responsive to a second range of frequencies that is less than the first range of frequencies. The second aperture is sized based on the angle between the array and the source, and includes a second subset of sensor elements. The first aperture and second aperture change in size as the angle changes, which results in a change in the sensor elements within the first subset and the second subset to maintain the source resolution for the array.
    Type: Grant
    Filed: January 9, 2009
    Date of Patent: August 30, 2011
    Assignee: The Boeing Company
    Inventor: James R. Underbrink
  • Patent number: 7996148
    Abstract: A method for obtaining directions to fixed location such as a restaurant includes using a telephone to call the restaurant, and providing a prompt to the caller during the call to push a button on the telephone to download GPS location of the restaurant. The GPS information is transferred from the telephone to a navigation module in a vehicle which displays a map showing the route to the restaurant.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: August 9, 2011
    Inventor: Avi Bergman
  • Patent number: 7978134
    Abstract: A system and method of training antennas for two devices having heterogeneous antenna configurations in a wireless network is disclosed. The method includes communicating one or more estimation training sequences between two devices via a phased array antenna and a switched array antenna, wherein a beamforming vector of the phased array antenna is switched between phase vectors within a set of weight vectors while the switched array antenna is switched within a plurality of antenna sectors. The method further includes tuning at least one of the phase array and switched array antennas with an antenna parameter selected based at least in part on the one or more estimation training sequences. The method further includes communicating data messages via at least one of the phase array and switched array antennas so tuned.
    Type: Grant
    Filed: August 11, 2008
    Date of Patent: July 12, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Huaning Niu, Pengfei Xia, Chiu Ngo
  • Publication number: 20110148703
    Abstract: An antenna for directional electronic communication and a directional communication system are provided. In one embodiment, the antenna includes: (1) a conductive shield having an opening at an end thereof and a radio frequency absorptive material located on an inner surface thereof, (2) a Luneberg lens located within said conductive shield and (3) a radio frequency signal conveyor located proximate a portion of said Luneberg lens that is distal from said opening.
    Type: Application
    Filed: March 1, 2011
    Publication date: June 23, 2011
    Inventors: Ralph E. Hayles, JR., Thomas H. O'Mara
  • Publication number: 20110122025
    Abstract: An antenna adjustment apparatus, an antenna adjustment method and a tangible machine-readable medium thereof are provided. The antenna adjustment apparatus is electrically connected to a directional antenna and is configured to generate a signal loss value according to an environmental coordinate parameter, an antenna coordinate parameter, an excitation parameter set and an antenna structure parameter. The antenna adjustment apparatus is configured to determine whether the signal loss value meets a communication quality condition and set an excitation parameter set, which meets the communication quality condition, as an available excitation parameter set so that the antenna radiation pattern of the directional antenna may be adjusted according to the available excitation parameter set.
    Type: Application
    Filed: February 5, 2010
    Publication date: May 26, 2011
    Applicant: Institute for Information Industry
    Inventors: Ting-Chieh TU, Yi-Heng FENG
  • Patent number: 7929981
    Abstract: A method for sending and receiving a virtual “shout” between two mobile terminals is provided. The method includes the steps of detecting mobile terminals in a near area of the sending terminal and presenting the detected terminals on a display on the sending terminal. At least one of the detected terminals may be selected and a “shout” is sent to the selected mobile terminal. The “shout” may be received in the selected mobile terminal and the user a user of the selected receiving terminal may be alerted as indication of a received “shout”.
    Type: Grant
    Filed: April 17, 2008
    Date of Patent: April 19, 2011
    Assignee: Sony Ericsson Mobile Communications AB
    Inventor: Troed Sangberg
  • Patent number: 7929918
    Abstract: Systems and methods of training antennas for two devices equipped with phased array antennas in a wireless network are disclosed. In one embodiment, the methods include transmitting a plurality of estimation training sequences from a transmit phased array antenna to a receive phased array antenna, wherein a length of at least one of the plurality of training sequences is adapted to a number of antenna elements at one of the transmit and receive phased array antennas. The methods further include transmitting data to the receive phased array antenna via the transmit phased array antenna tuned with a transmit beamforming vector (BV) selected based at least in part on the plurality of estimation training sequences.
    Type: Grant
    Filed: August 11, 2008
    Date of Patent: April 19, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Huaning Niu, Pengfei Xia, Chiu Ngo
  • Patent number: 7929914
    Abstract: A mote network having and/or using one or more directional antennas.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: April 19, 2011
    Assignee: The Invention Science Fund I, LLC
    Inventor: Clarence T. Tegreene
  • Patent number: 7916080
    Abstract: Systems and methods for providing network access to mobile devices that travel with a vehicle, such as a train, a bus, a boat, etc. along or adjacent to a relatively fixed path that may extend over a large geographic area. Mobile devices access the network through stationary access points arranged along or adjacent to the path and communicate with a communication network. The communication network may be arranged as an asynchronous transfer mode (ATM) local area network emulation (LANE) network. One of the mobile devices may be a mobile access point which can couple other mobile devices to the network and record authentication information of other mobile devices so that fast transitions can be made from one stationary access point to another as the vehicle moves along the path.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: March 29, 2011
    Assignee: WiFi Rail, Inc.
    Inventor: Cooper G. Lee
  • Patent number: 7916081
    Abstract: A beamforming method comprises transmitting a training sequence from a transmitter array employing a set of beamforming vectors from a beamforming codebook. A receive array employs a combining codebook to acquire channel state information from the received transmissions, and estimates a preferred beamforming vector and a preferred combining vector. At least the preferred beamforming vector (and, optionally, the preferred combining vector) is transmitted back to the transmitter array.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: March 29, 2011
    Assignee: QUALCOMM Incorporated
    Inventor: Ismail Lakkis
  • Patent number: 7911329
    Abstract: A system and method for adaptive motion sensing with location determination is described. In one embodiment, the adaptive motion sensor is based on vibration sensor readings and can identify different states of motions based on modifiable parameters.
    Type: Grant
    Filed: January 6, 2009
    Date of Patent: March 22, 2011
    Assignee: SkyBitz, Inc.
    Inventors: Rich Battista, Jianming Yuan
  • Patent number: 7898476
    Abstract: In one embodiment, a system for controlling the direction of an antenna beam includes a location identifier, an orientation sensor, and an antenna beam controller. The location identifier determines a transmit antenna location indicating the location of a transmit antenna, where the transmit antenna produces an antenna beam. The orientation sensor determines a transmit antenna orientation indicating the orientation of the transmit antenna. The antenna beam: accesses target data describing a receive antenna of a target, the target data comprising a location of the receive antenna relative to the transmit antenna; calculates a deviation value from the transmit antenna location, the transmit antenna orientation, and the target data; and adjusts the direction of the antenna beam to reduce the deviation value.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: March 1, 2011
    Assignee: Raytheon Company
    Inventors: Richard W. Nichols, Gilbert M. Shows, Joel C. Roper
  • Patent number: 7893873
    Abstract: Embodiments disclosed herein relate to methods and systems for providing improved position-location (e.g., time-of-arrival) measurement and enhanced position location in wireless communication systems. In an embodiment, an access point may replace information (e.g., data) transmission by a “known” transmission (or “reference transmission”) at a predetermined time known to access terminals in the corresponding sectors. The access terminals may use the received reference transmission to perform a position-location measurement, and report back the measured information. The access point may also send a reference transmission on demand, e.g., in response to a request from an access terminal in need for a location-based service.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: February 22, 2011
    Assignee: QUALCOMM Incorporated
    Inventors: Peter John Black, Matthew S. Grob
  • Patent number: 7876265
    Abstract: Embodiments disclosed herein relate to methods and systems for providing improved position-location (e.g., time-of-arrival) measurement and enhanced position location in wireless communication systems. In an embodiment, an access point may replace information (e.g., data) transmission by a “known” transmission (or “reference transmission”) at a predetermined time known to access terminals in the corresponding sectors. The access terminals may use the received reference transmission to perform a position-location measurement, and report back the measured information. The access point may also send a reference transmission on demand, e.g., in response to a request from an access terminal in need for a location-based service.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: January 25, 2011
    Assignee: QUALCOMM Incorporated
    Inventors: Peter John Black, Matthew S. Grob
  • Patent number: 7859458
    Abstract: A method for establishing a wireless communication link between a first communication device having a beam antenna to be steered to different positions and a second communication device. The method includes transmitting a link request signal from the first communication device to the second communication device via the beam antenna. The link request signal includes information relating to a current position of the beam antenna. The method further includes obtaining, in case the link request signal is received in the second communication device, channel quality information representative of a current transmission path.
    Type: Grant
    Filed: June 1, 2009
    Date of Patent: December 28, 2010
    Assignee: Sony Deutschland GmbH
    Inventors: Masahiro Uno, Zhaocheng Wang
  • Patent number: 7852265
    Abstract: A wireless area network communication system comprising at least one phased array antenna frame, a phased array antenna circuit connected to the at least one phased array antenna frame wherein said phased array circuit and said at least one phased array antenna frame are adapted to transmit and receive wireless area network compliant signals from or to wireless area network devices.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: December 14, 2010
    Inventors: Alberto Milano, Hillel Weinstein
  • Publication number: 20100309049
    Abstract: A system for facilitating wireless communication in an apparatus that may be triggered by the realization of data for wireless transmission. A determination may then be made as to whether the data is intended for transmission to a certain recipient (e.g., a specific apparatus) or in a specific direction. The data may then be transmitted using directional wireless communication if a wireless transport is determined to be usable for transmitting the data in a direction based on the previous determination. If directional wireless communication is not available, the data may be transmitted via omnidirectional communication.
    Type: Application
    Filed: June 5, 2009
    Publication date: December 9, 2010
    Applicant: NOKIA CORPORATION
    Inventors: Jukka REUNAMÄKI, Arto Tapio PALIN
  • Publication number: 20100302014
    Abstract: A method for locating a target wireless device is disclosed. At least one directional antenna is swept through a field of view at each of a plurality of sensing locations. A position is determined for each of the plurality of sensing locations. During the sweep at each of the plurality of sensing locations, a set of signal strength data for the target wireless device and a set of bearing information are collected. A plurality of lines of bearing are determined, one from each of the plurality of sensing locations to the target wireless device, based on the determined position, the collected set of signal strength data, and bearing information for each of the plurality of sensing locations. A target location of the target wireless device is determined based on an intersection of at least two lines of bearing from the plurality of lines of bearing.
    Type: Application
    Filed: May 26, 2009
    Publication date: December 2, 2010
    Inventors: Richard Michael Gloo, Jacob Michael Baker, Alexander James Williams, Jason S. Lashure, Robert James Durham, Nicholas Lawrence Owens
  • Publication number: 20100277368
    Abstract: Multi-pattern transmission of wireless frames. A digital device contains a transmitter feeding an electronically steerable antenna system where the radiation pattern produced by the antenna system may be selected. Different antenna radiation patterns are used in transmitting a first portion of a wireless frame and a second portion of a wireless frame in a wireless digital network. In one embodiment, a first portion of a wireless frame is transmitted using a wide radiation pattern while the second portion of the frame is transmitted using a second radiation pattern. Switching among radiation patterns in the electronically steerable antenna system may be accomplished by switching between antenna types, such as an omnidirectional antenna for the wide pattern, and beam-steered or sectorized antennas for the second radiation pattern. Beam-forming and/or phasing approaches may also be used. The first and second portions of the frame may be transmitted at different power levels.
    Type: Application
    Filed: April 29, 2009
    Publication date: November 4, 2010
    Applicant: Aruba Networks, Inc.
    Inventor: Subburajan Ponnuswamy
  • Patent number: 7809337
    Abstract: An apparatus and method for adjusting transmission phasing in a point-to-point communication link is disclosed. The relative phases of the transmissions from each antenna are adjusted before transmission to give optimum gain when received by two or more antenna elements and a signal combining element. The signal includes a data component, consisting of a subset of the subcarriers modulated with the input data, which is common to transmissions from all antenna elements; and a phase reference component consisting of a subset of the subcarriers that are modulated with a predetermined phase. The signal combining element is operable to receive the components and extract phase information.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: October 5, 2010
    Assignee: Motorola, Inc.
    Inventor: Peter N. Strong
  • Publication number: 20100245173
    Abstract: A wireless sensor network system includes a plurality of sensor devices each having a non-directional antenna, and an information gathering apparatus having an adaptive array antenna and gathering information detected by the plurality of sensor devices. Each sensor device includes a transmitter to transmit a transmission request for connecting to the information gathering apparatus. The information gathering apparatus includes, a first directivity-changing section that, when the information gathering apparatus receives a transmission request from an unconnected sensor device, performs one of changing the adaptive array antenna to be non-directional, and changing a directivity of the adaptive array antenna, and that receives a signal transmitted from one of the unconnected sensor device and the unconnected sensor device and a connected sensor device, and a second directivity-changing section to change the directivity in accordance with a reception state of the signal.
    Type: Application
    Filed: March 29, 2010
    Publication date: September 30, 2010
    Applicant: FUJITSU LIMITED
    Inventor: Atsushi Honda
  • Publication number: 20100248672
    Abstract: Beams are used to communicate in a wireless network including mobile and stationary receivers. The network operates according to the IEEE 802.11p in wireless access to vehicular environments (WAVE). A direction from the mobile transceiver to the stationary receiver is predicted using geographic information available to the mobile transceiver. A set of signals are received in the mobile transceiver from the stationary transceiver, wherein the signals are received by an array of antennas, and wherein the signals are received using a set of beams, and wherein each beam is approximately directed at the stationary receiver. A signal-to-noise ratio (SNR) is measured for each beam, and the beam with an optimal SNR is selected as an optimal beam for communicating data between the mobile transceiver and the stationary transceiver.
    Type: Application
    Filed: March 30, 2009
    Publication date: September 30, 2010
    Inventors: Philip V. Orlik, Raymond Yim, Ramesh Annavajjala, Jinyun Zhang
  • Publication number: 20100231373
    Abstract: A method, system and computer program product for providing notification to the driver of a vehicle when the vehicle's speed exceeds the speed limit within a speed control zone. A vehicular speed control (VSC) utility retrieves information indicating the speed limit of the speed control zone from an information signal detected by a radio receiver. The receiver is electrically coupled to the speed sensor circuitry of the vehicle to track the vehicle's velocity. The VSC utility determines whether to activate a speed notification alarm by comparing the vehicle's velocity with the zone's speed limit. When the vehicle's velocity exceeds the speed limit of the speed control zone, the VSC utility triggers the alarm and alerts the driver of the excessive speed with an audible/visible notification. The VSC utility may re-trigger the alarm if the driver continues to exceed the speed limit while driving within close proximity of the speed control zone.
    Type: Application
    Filed: March 13, 2009
    Publication date: September 16, 2010
    Inventor: Greg Romp
  • Publication number: 20100231451
    Abstract: An antenna device has a linear antenna element; a passive element section provided in proximity to the antenna element; and a control section that controls the passive element section. The passive element section has a linear line laid in parallel to the antenna element; and an impedance adjustment section that adjusts impedance of the passive element section. A compact antenna device capable of switching its directivity by means of electrical operation can be provided.
    Type: Application
    Filed: October 23, 2007
    Publication date: September 16, 2010
    Applicant: PANASONIC CORPORATION
    Inventors: Wataru Noguchi, Hiroyuki Yurugi, Sotaro Shinkai, Akihiko Shiotsuki, Toshihiro Ezaki
  • Publication number: 20100156721
    Abstract: Embodiments of an indoor millimeter-wave wireless personal area network and method are described. In some embodiments, a directional antenna (103) and a diffusive reflector (106) are used to increase throughput and reduce multipath components.
    Type: Application
    Filed: June 16, 2006
    Publication date: June 24, 2010
    Inventors: Siavash M. Alamouti, Alexander Alexandrovich Maltsev, Vadim Sergeyevich Sergeyev, Alexander Alexandrovich Maltsev, JR.
  • Patent number: 7737890
    Abstract: The present invention relates to a method for transmitting signals in a wireless communication system, in which signals are transmitted from a first communication device to a second communication device, said signals being transmitted in consecutive frames, each frame having a preamble section including preamble information, at least one of said first and said second communication devices having a narrow beam antenna which is adapted to be steered to different positions, each of said different positions corresponding to one of a number of different transmissions paths from said to said second communication device, including the steps of transmitting and receiving a first preamble section including preamble information enabling the estimation of a channel quality of a current transmission path, while said narrow beam antenna is in a current position corresponding to said current transmission path, steering said narrow beam antenna from said current position to a different position corresponding to a candidate
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: June 15, 2010
    Assignee: Sony Deutschland GmbH
    Inventors: Zhaocheng Wang, Masahiro Uno, Volker Wullich
  • Patent number: 7725080
    Abstract: A mote network having and/or using one or more directional antennas.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: May 25, 2010
    Assignee: The Invention Science Fund I, LLC
    Inventor: Clarence T. Tegreene
  • Patent number: 7706842
    Abstract: A mote network having and/or using one or more directional antennas.
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: April 27, 2010
    Assignee: Searete, LLC
    Inventor: Clarence T. Tegreene
  • Patent number: 7663545
    Abstract: A method, system and apparatus for determining at least one relative characteristic of a transmit diversity transmitter based on at least one quality indicator based on signals received on the plurality of antennas. In some embodiments of the invention, the relative characteristic may be a relative power or amplitude ratio and/or a phase difference between the signals transmitted on the different antennas.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: February 16, 2010
    Assignee: Magnolia Broadband Inc.
    Inventors: Haim Harel, Kenneth Kludt, Yair Karmi
  • Patent number: 7652624
    Abstract: Embodiments of millimeter-wave communication stations with directional antennas and methods for fast link recovery are generally described herein. Other embodiments may be described and claimed. In some embodiments, a transmitting station retransmits a packet in an adjacent direction when an acknowledgement is not received from a receiving station after a number of retransmission attempts. In other embodiments, a receiving station changes its reception to an adjacent direction when a packet is not received from a transmitting station after a number of missed reservations.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: January 26, 2010
    Assignee: Intel Corporation
    Inventors: Guoqing C. Li, Kristoffer D Fleming, Richard D. Roberts
  • Patent number: 7642961
    Abstract: An antenna positioning system comprises a first antenna system, a second antenna system, and a computer system. The computer system determines azimuths and elevations for the antenna systems to point at one another. The computer system retrieves license data for the antenna systems and determines if the antenna systems are licensed for the azimuths and elevations. If the antenna systems are licensed for the azimuths and elevations, then the computer system transfers control signals to the antenna systems indicating the azimuths and elevations. In response to the control signals, the antenna systems position themselves to the azimuths and elevations.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: January 5, 2010
    Assignee: Sprint Communications Company L.P.
    Inventor: Walter F. Rausch
  • Patent number: 7642962
    Abstract: An adaptive array antenna is disclosed which permits the circuit scale to be reduced by omitting a down-converter, an AD converter, and interconnects for them while controlling the directivity well. In one aspect, the array antenna comprises phase shift-amplitude control modules which accept signals received by antenna elements via an analog-to-digital converter. The value of any one of phase-amplitude change modules is set to 1. The values of the other phase-amplitude change modules are set to 0. Thus, the signal from any one antenna element is accepted. This sequence of operations is repeated as many times as there are antenna elements, whereby signals received by all the antenna elements can be accepted.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: January 5, 2010
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Chikahiro Tomita, Fumitaka Iizuka, Kenji Kamitani
  • Publication number: 20090256747
    Abstract: A variable directivity antenna (2) has directivity direction angularly variable stepwise about itself. A tuner (8) selects a desired one from high frequency signals received at the antenna (2). The tuner (8) detects the level of the received signal and supplies it to a control unit (10). The control unit (10) searches for received signal levels, equal to or higher than a threshold level, of the received signal received in plural states in which the directivity of the antenna (2) is placed in different ones of directivity directions, and detects a slope of the received signal levels within a frequency range of the received signal. The control unit (10) employs the searched directivity direction for the smallest one of the detected slopes as the direction to which the antenna (2) is directed to receive the signal.
    Type: Application
    Filed: April 10, 2009
    Publication date: October 15, 2009
    Applicant: DX ANTENNA COMPANY, LIMITED
    Inventors: Eiji Shibuya, Takayuki Yoshii
  • Patent number: 7596387
    Abstract: A primary station for a wireless communication system transmits and receives communications within a sectorized cell with at least one secondary station. The primary station transmits and receives signals within a beam; and directs the signal transmission and reception as a shaped beam. The shaped beam is directed at a plurality of predetermined directions; either continuously or discretely.
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: September 29, 2009
    Assignee: InterDigital Technology Corporation
    Inventors: Steven Jeffrey Goldberg, Angelo Cuffaro
  • Publication number: 20090231194
    Abstract: The present invention comprises a method for establishing a wireless communication link between a first communication device (1) having a narrow beam antenna (2) adapted to be steered to different positions and a second communication device (10), comprising the steps of transmitting a link request signal from said first communication device (1) to said second communication device (10) via said narrow beam antenna, wherein said link request signal comprises information relating to a current position of the narrow beam antenna, and obtaining, in case said link request signal is received in said second communication device (10), channel quality information representative of a current transmission path. The invention further comprises a transmitting device and a receiving device for executing said method.
    Type: Application
    Filed: June 1, 2009
    Publication date: September 17, 2009
    Applicant: Sony Deutschland GmbH
    Inventors: Masahiro UNO, Zhaocheng WANG
  • Publication number: 20090219207
    Abstract: A variable directivity antenna (2) has directivity direction variable stepwise along the circumference of a circle centered about it. A tuner (8) selects a desired one from high frequency signals received at the antenna (2). The tuner (8) detects the level of the received signal and supplies it to a control unit (10). The control unit (10) searches for reception signal levels, equal to or higher than a threshold level, of the received signal received in antenna states in which the directivity of the antenna (2) is placed in different ones of directivity directions, and detects a signal-to-noise ratio of the signal received from directions adjacent to each of the searched directivity directions corresponding to the searched signal levels. The control unit (10) employs the searched directivity direction for the highest signal-to-noise ratio as the direction to which the antenna (2) is directed to receive the signal.
    Type: Application
    Filed: February 2, 2009
    Publication date: September 3, 2009
    Applicant: DX Antenna Company, Limited
    Inventors: Eiji Shibuya, Takayuki Yoshii
  • Publication number: 20090213007
    Abstract: An apparatus and method for transmitting Coexistence Beacon Protocol (CBP) in a cognitive radio system are provided. The apparatus includes a detector, a controller, and a transmitter. The detector scans channels on which neighboring Base Stations (BSs) operate through a plurality of directional antennas. The controller links the plurality of directional antennas with BSs, respectively. The transmitter receives a CBP packet through the directional antenna linked with the BS, and transmits the received CBP packet to at least one or more other BSs linked with at least one or more other directional antennas.
    Type: Application
    Filed: February 26, 2009
    Publication date: August 27, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Cheng SHAN, Do-Young KIM, Eun-Taek LIM, Jung-Soo WOO, Geun-Ho LEE, Sang-Bum KIM, Yong-Ho PARK
  • 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
  • Publication number: 20090160707
    Abstract: A beamforming method comprises transmitting a training sequence from a transmitter array employing a set of beamforming vectors from a beamforming codebook. A receive array employs a combining codebook to acquire channel state information from the received transmissions, and estimates a preferred beamforming vector and a preferred combining vector. At least the preferred beamforming vector (and, optionally, the preferred combining vector) is transmitted back to the transmitter array.
    Type: Application
    Filed: December 19, 2007
    Publication date: June 25, 2009
    Inventor: Ismail Lakkis
  • Patent number: 7551135
    Abstract: The present invention comprises a method for establishing a wireless communication link between a first communication device (1) having a narrow beam antenna (2) adapted to be steered to different positions and a second communication device (10), comprising the steps of transmitting a link request signal from said first communication device (1) to said second communication device (10) via said narrow beam antenna, wherein said link request signal comprises information relating to a current position of the narrow beam antenna, and obtaining, in case said link request signal is received in said second communication device (10), channel quality information representative of a current transmission path. The invention further comprises a transmitting device and a receiving device for executing, said method.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: June 23, 2009
    Assignee: Sony Deutschland GmbH
    Inventors: Masahiro Uno, Zhaocheng Wang