Including A Steerable Array Patents (Class 342/368)
  • Patent number: 7633851
    Abstract: A circuit for generating a cyclic prefix of a symbol comprised of a sequence of time samples, the prefix being the reproduction of the last samples of the symbol at the beginning of the symbol, the symbol being obtained by inverse Fourier transform of complex coefficients corresponding to respective frequencies. The circuit includes a multiplier that shifts the phase of each complex coefficient by a value proportional to its frequency, a memory for storing the samples at the beginning of the symbol, and a multiplexer that copies at the end of the symbol the stored samples.
    Type: Grant
    Filed: January 21, 2004
    Date of Patent: December 15, 2009
    Assignee: STMicroelectronics S.A.
    Inventors: Simone Mazzoni, Joel Cambonie
  • Publication number: 20090303125
    Abstract: A transmit and/or receive array antenna comprises an array (R) of sub-arrays (SR) of at least one radiating element (ER) and control means charged with controlling the amplitude and/or the phase of the radiofrequency signals to be transmitted or received in the form of waves by each of the sub-arrays (SR) so that they transmit or receive signals according to a chosen pattern. The sub-arrays (SR) comprise a mean number of radiating elements (ER) which increases from the center of the array (R) to its periphery, and are arranged with respect to one another so as to constitute an irregular mesh offering pattern sidelobes of low intensity and a high gain in a favored direction.
    Type: Application
    Filed: November 27, 2006
    Publication date: December 10, 2009
    Inventors: Gerard Caille, Philippe Voisin, Yann Cailloce, Cecile Guiraud
  • Publication number: 20090303126
    Abstract: Systems and methods according to one or more embodiments provide for a multicode transmitter/receiver that acts like a high power array when a correlated receiver is used, but acts as a collection of small low gain transmitters when an uncorrelated receiver is used. In one embodiment, a method of transmitting and receiving signals comprises splitting a signal into more than one portion for feeding the signal into separate elements of an array; coding each portion of the signal for transmission through each separate element of the array with a different code respectively; transmitting each coded portion of the signal through a corresponding separate element of the array; receiving the coded portions of the signal by at least one element on a receiver side; decoding the coded portions of the signal; and adding decoded portions of the signal to form a complete received signal.
    Type: Application
    Filed: June 5, 2008
    Publication date: December 10, 2009
    Inventors: Atul Jain, David A. Whelan
  • Publication number: 20090303124
    Abstract: A rapidly deployable HF surface wave radar phased array antenna system is provided, including a plurality of separate antenna elements that are relatively movable to desired spaced apart positions, each antenna element including a respective receiver for receiving HF radio signals, wherein, in order to determine and control properties of the radar system, each element includes a GPS receiver for determining the location of each element and for timing and frequency synchronisation.
    Type: Application
    Filed: July 12, 2007
    Publication date: December 10, 2009
    Inventor: Trevor Martin Blake
  • Patent number: 7630343
    Abstract: Disclosed is a wireless station having a receiver and a network allocation vector associated with each of a plurality of directional antennas. The receivers concurrently listen for frames from remote stations. When any receiver detects a frame from a remote station, the receiver activates its associated NAV. The station has one or more transmitters that can transmit using the antennas. While transmitting a signal using an antenna, the receivers associated with any non-transmitting antennas continue to listen for signals from remote stations. The station cancels any signals from the transmitting antenna received by the non-transmitting antennas. To perform the cancellation, the station performs a self-calibration procedure. The station can self-calibrate by either silencing neighboring stations or by inserting null tones into a transmitted calibration signal.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: December 8, 2009
    Assignee: Fujitsu Limited
    Inventors: Chenxi Zhu, Tamer Nadeem, Jonathan Agre
  • Patent number: 7627300
    Abstract: A wireless communications network includes a plurality of wireless devices equipped with direction-agile antenna systems to allow the wireless devices to establish and maintain wireless data links with each other.
    Type: Grant
    Filed: August 30, 2006
    Date of Patent: December 1, 2009
    Assignee: Airgain, Inc.
    Inventors: Oleg Y. Abramov, Alexander G. Kashkarov, Alexander N. Kirdin
  • Patent number: 7626754
    Abstract: An apparatus and method for steering a beam of light using an array of tunable optical phase delay elements is presented. The sidelobes of an angular spectrum of light reflected from the array are causing an optical crosstalk. The selected sidelobes are suppressed by perturbing the phase delay pattern of the array elements. The pattern of perturbations is found by linearizing a system of equations describing dependence of the angular spectrum of the reflected light on the phase delays introduced into the wavefront of light by the elements of the array.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: December 1, 2009
    Assignee: JDS Uniphase Corporation
    Inventor: Christopher Reimer
  • Publication number: 20090278742
    Abstract: The embodiments of the invention describe a method for antenna selection in a wireless communication network. The network includes a transceiver having a set of antennas. The transceiver is configured to transmit a frequency-hopped sounding reference signal (SRS) over a subband from a subset of antennas at a time. The transceiver transmits the frequency-hopped SRS from subsets of antennas in the set of antennas substantially alternately. In response to the transmitting, the transceiver receives information indicative of an optimal subset of antennas and transmits data from the optimal subset of antennas.
    Type: Application
    Filed: March 31, 2009
    Publication date: November 12, 2009
    Inventors: Neelesh B. Mehta, Koon Hoo Teo, Jinyun Zhang
  • Patent number: 7616929
    Abstract: A Radio Frequency (RF) transceiver includes a first RF transceiver group, a second RF transceiver group, local oscillation circuitry, and calibration control circuitry. Each of the RF transceiver group has an RF transmitter and an RF receiver. The local oscillation circuitry selectively produces a local oscillation to the first RF transceiver group and to the second RF transceiver group. The calibration control circuitry is operable to initiate calibration operations including transmitter self calibration operations, first loopback calibration operations, and second loopback calibration operations. During loopback calibration operations, test signals produced by an RF transceiver group are looped back to an RF receiver of another RF transceiver group.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: November 10, 2009
    Assignee: Broadcom Corporation
    Inventor: Arya Reza Behzad
  • Publication number: 20090267835
    Abstract: The invention provides for phased array radar system that mechanically reconfigures its antenna array from a single faced aperture into two geometrically opposed arrays.
    Type: Application
    Filed: April 25, 2008
    Publication date: October 29, 2009
    Applicant: LOCKHEED MARTIN CORPORATION
    Inventor: Byron W. Tietjen
  • Patent number: 7610064
    Abstract: A downlink module is provided that includes a sensor interface operable to provide digital sensor signals. It also includes a GPS receiver for receiving GPS timing and location signals. The downlink module may be configured to form packets of digital sensor signals and GPS timing and location signals according to a desired protocol.
    Type: Grant
    Filed: September 16, 2004
    Date of Patent: October 27, 2009
    Inventor: Farrokh Mohamadi
  • Patent number: 7609205
    Abstract: An electrically steerable phased array antenna system includes an array of antenna elements and a corporate feed network having an inner region for input of two input signals A and B. The corporate feed network has two outer regions and generating vector combinations of respective input signals and other input signal fractions. Each outer region has a splitting and combining network providing the vector combinations as signals to antenna elements connected predominantly peripherally to itself. Each splitting and combining network has input signal connections from the inner region disposed peripherally of the corporate feed network. Each consists of splitters and adding/subtracting elements implemented as hybrid couplers some of which have re-entrant or meandered track sections. Hybrid meandered track sections have multiple widths for signal weighting. The corporate feed network is configured to avoid track cross-overs.
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: October 27, 2009
    Assignee: Qinetiq Limited
    Inventor: Philip Edward Haskell
  • Patent number: 7605754
    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: December 2, 2008
    Date of Patent: October 20, 2009
    Assignee: NEC Corporation
    Inventor: Norihiko Oomuro
  • Publication number: 20090251368
    Abstract: A phased array receiver includes a plurality of receive paths having a plurality of downconverters, a plurality of digitally controlled local oscillators associated with the plurality of receive paths, and a combiner. In response to a plurality of digital phase control signals, the plurality of digitally controlled local oscillators controls phases of a plurality of local oscillator signals generated by the plurality of digitally controlled local oscillators. The phases of the plurality of local oscillator signals are introduced as phase shifts in a plurality of intermediate frequency signals produced by the plurality of downconverters. The plurality of digitally controlled local oscillators is configured to respond to changes in digital values of the plurality of digital phase control signals to achieve a desired phase relationship among the phases of the intermediate frequency signals.
    Type: Application
    Filed: April 4, 2008
    Publication date: October 8, 2009
    Inventor: Earl W. McCune, JR.
  • Publication number: 20090251370
    Abstract: The invention is related to an apparatus comprising: at least one generator configured to provide a plurality of signals comprising at least partially correlated noise; and a circuitry configured to convey the signals comprising at least partially correlated noise to a plurality of nonadjacent antenna array elements.
    Type: Application
    Filed: May 30, 2008
    Publication date: October 8, 2009
    Inventors: Thomas Hohne, Ville Ranki
  • 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
  • Patent number: 7583229
    Abstract: A method for early detection of faulty antenna arrays comprising the step of treating said detection as a special case of target recognition; wherein targets of interest are all previous examples of defective antenna arrays.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: September 1, 2009
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: John T. Apostolos, Richard C. Ball
  • Patent number: 7580674
    Abstract: An antenna control interface is integrated with common integrated circuit components, such as radio transceiver or baseband modem signal processing control logic. The antenna control interface controls the operation of an adaptive antenna array used with wireless communication system devices.
    Type: Grant
    Filed: March 3, 2003
    Date of Patent: August 25, 2009
    Assignee: IPR Licensing, Inc.
    Inventors: Thomas E. Gorsuch, John A. Regnier, John E. Hoffmann, George Rodney Nelson, Jr., James A. Proctor, Jr.
  • Publication number: 20090207078
    Abstract: Method, apparatus, associated computer programs, and signals for channel identification in Multiple-Input Multiple-Output (MIMO) communications systems, and in particular wireless communications systems. The channel derivation method uses steering of mutually orthogonal beamformers at the transmitter end to allow direct identification, whether by selection or mathematical computation, of the channel matrix and hence the preferred transmit beam orientations.
    Type: Application
    Filed: July 4, 2005
    Publication date: August 20, 2009
    Inventors: Paul Nicholas Fletcher, Michael Dean, Paul Anthony Hickling
  • Patent number: 7573272
    Abstract: A method of testing the electrical functionality of an optically controlled switch in a reconfigurable antenna is provided. The method includes configuring one or more conductive paths between one or more feed points and one or more test point with switches in the reconfigurable antenna. Applying one or more test signals to the one or more feed points. Monitoring the one or more test points in response to the one or more test signals and determining the functionality of the switch based upon the monitoring of the one or more test points.
    Type: Grant
    Filed: January 30, 2006
    Date of Patent: August 11, 2009
    Assignee: Honeywell International Inc.
    Inventors: Robert C. Becker, David W. Meyers, Kelly P. Muldoon, Douglas R. Carlson, Jerome P. Drexler
  • Patent number: 7570957
    Abstract: An object is to implement transmission by an appropriate transmission method according to a type of information even in application of directional beam transmission.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: August 4, 2009
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiroyuki Atarashi, Sadayuki Abeta, Mamoru Sawahashi
  • Publication number: 20090179797
    Abstract: A method for coordinating beam forming between two communicating entities includes obtaining cell loading information and adjusting a number of used beam-sets at a specific scheduling time according to the cell loading information. The method further includes transmitting a common pilot that is not beam-formed together with feed-forward information according to the cell loading. A wireless communication system employing conventional CL-MIMO protocols can be adapted to employ the methodology.
    Type: Application
    Filed: January 13, 2009
    Publication date: July 16, 2009
    Applicant: FutureWei Technologies, Inc.
    Inventors: Young Hoon Kwon, Anthony C. K. Soong, Cornelius Van Rensburg
  • Publication number: 20090179791
    Abstract: Systems and methods are disclosed herein to provide improved phased array antenna system. For example, in accordance with an embodiment of the present invention, a phased array antenna system includes a plurality of horn/filter assemblies. A plurality of modules are adapted to provide RF signals to the horn/filter assemblies. Each of the horn/filter assemblies is mounted on a top surface of a corresponding one of the modules. A thermal system is adapted to cool the modules. The modules are mounted on a first surface of the thermal system. A plurality of distribution boards associated with the modules are mounted on a second surface of the thermal system. A plurality of interconnects associated with the modules are adapted to connect the modules with the distribution boards through the thermal system.
    Type: Application
    Filed: July 24, 2006
    Publication date: July 16, 2009
    Inventors: David Kalian, Thomas F. Klein, III, Paul J. Tatomir, Alfred E. Lee
  • Patent number: 7561099
    Abstract: To provide a radar device that is capable of performing both of long-distance detection performance and short-distance wide-angle monitor in a DBF system radar, there is provided a radar device of a digital beam forming system that radiates waves toward a space, receives a reflected wave that is reflected by an object which exists within the space, and subjects the received reflected wave to signal processing to thereby measure the object, the radar device including a transmitting antenna that radiates waves toward an observation range where required maximum distances different in respective azimuths are assumed, and has a directivity characteristic in which the transmitting gains in the respective azimuths are set on the basis of the distance attenuation characteristic at the required maximum distances.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: July 14, 2009
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toshio Wakayama, Takayuki Inaba
  • Publication number: 20090167605
    Abstract: A phased array antenna system with two dimensional scanning includes a two dimensional array A of antenna elements A1,1 to A12,12 arranged in lines; each line is associated with a respective first rank corporate feed network 161 to 1612 having outputs 171,1 to 1712,12 connected to respective antenna elements A1,1 to A12,12 and inputs for variable relative phase input signals. These corporate feed networks each have first and second inputs A1/B1 to A12/B12 connected respectively to outputs 171 CD/1712CD to 171EF/1712EF of different second rank corporate feed networks 16CD and 16EF. The corporate feed networks 161 to 16EF convert input signals of variable relative phase into relatively greater numbers of output signals for a phased array.
    Type: Application
    Filed: May 29, 2007
    Publication date: July 2, 2009
    Inventor: Philip Edward Haskell
  • Publication number: 20090167604
    Abstract: Briefly, in accordance with one or more embodiments, a phased array antenna may utilize Multilateration in order to implement beam steering with a phased antenna array. During a training phase, Multilateration equations may be utilized to determine a coordinate location of an antenna of a target device. The time difference of arrival of the training signal may be determined at selected antenna elements of the antenna array. The location of the antenna of the target device may then be calculated from which the propagation time may be determined. The propagation time may then be converted to relative phase shift values for each antenna element in the array with respect to a reference antenna element. A beam may then be directed toward the antenna of the target device by setting the elements of the antenna array with the calculated phase shifts.
    Type: Application
    Filed: December 31, 2007
    Publication date: July 2, 2009
    Inventor: Richard D. Roberts
  • 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: 7551136
    Abstract: Systems and methods are disclosed herein to provide improved phased array antenna system. For example, in accordance with an embodiment of the present invention, a phased array antenna system includes a plurality of horn/filter assemblies. A plurality of modules are adapted to provide RF signals to the horn/filter assemblies. Each of the horn/filter assemblies is mounted on a top surface of a corresponding one of the modules. A thermal system is adapted to cool the modules. The modules are mounted on a first surface of the thermal system. A plurality of distribution boards associated with the modules are mounted on a second surface of the thermal system. A plurality of interconnects associated with the modules are adapted to connect the modules with the distribution boards through the thermal system.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: June 23, 2009
    Assignee: The Boeing Company
    Inventors: David Kalian, Thomas F. Klein, III, Paul J. Tatomir, Alfred E. Lee
  • Patent number: 7548764
    Abstract: Techniques are provided herein for generating multiple radiation patterns. An antenna system comprises an antenna array having one or more antennas for providing a first radiation pattern and a second radiation pattern, a transform matrix for transforming one or more inputs into one or more outputs according to a transform function, wherein the outputs of the transform matrix provide signals to the antennas with predetermined phases and magnitudes for generating the first and second radiation patterns, and a transmitter for providing a first set of signals corresponding to the first radiation pattern and a second set of signals corresponding to the second radiation pattern to inputs of the transform matrix.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: June 16, 2009
    Assignee: Cisco Technology, Inc.
    Inventors: Hang Jin, Brian L. Kurtz, Weidong Yang, Daniel Wee, Phil Davis, John Grabner
  • Patent number: 7545321
    Abstract: The apparatus comprises a calibration signal supply means, which supplies calibration signals to a plurality of antenna elements that are to be subjected to calibration; a calibration signal extracting means, which extracts the calibration signals from signals received by the antenna elements placed, one on each side of the plurality of antenna elements that are to be subjected to calibration, and a calibration control means and which individually controls the phases of signals to be transmitted from the plurality of antenna elements that are to be subjected to calibration, based on the phase differences among the calibration signals extracted by the calibration signal extracting means. This will realize accurate calibration of an array antenna, irrespective of antenna element interval deviation.
    Type: Grant
    Filed: August 24, 2005
    Date of Patent: June 9, 2009
    Assignee: Fujitsu Limited
    Inventor: Toshio Kawasaki
  • Publication number: 20090140920
    Abstract: The present invention relates to a dynamic radiation pattern antenna system comprising a plurality of antenna units, a control unit and an electronic interface. The plurality of antenna units has electronically controllable radiation patterns. The control unit is dynamically controlling the radiation pattern of the plurality of antenna units and the electronic interface connects the plurality of antenna units to the control unit.
    Type: Application
    Filed: November 29, 2007
    Publication date: June 4, 2009
    Inventors: Jean-Francois Frigon, Christophe Caloz
  • Publication number: 20090135064
    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: Application
    Filed: February 5, 2007
    Publication date: May 28, 2009
    Applicant: Panasonic Corporation
    Inventors: Hong Chen Michael Sim, Taisuke Matsumoto, Hiroshi Doi
  • Patent number: 7535410
    Abstract: A weight calculation method begins by storing a target reflection signal of a radar pulse received via an antenna in cells corresponding to positions along with a reception timing for a plurality of processing range cells having lengths equivalent to prescribed ranges on a time axis. The method continues by calculating weights by stage for the phase and amplitude of the target reflection signal to form a reception composite beam so that arrival directions of spurious elements become zero to an arrival direction of the target reflection signal by using values stored in the plurality of processing cells. The calculating of the weights monitors changes of specific variables indicating correlation values among stages in the plurality of processing stages to stop a shift to the next processing stage at the time when the variables exceed a reference value.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: May 19, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Junichiro Suzuki
  • Patent number: 7535409
    Abstract: A time-reversal imaging radar system for acquiring an image of a remote target includes an antenna array having a plurality of spaced-apart antennas, and a transceiver coupled to the antenna array for alternately transmitting a radar signal via the antenna array toward the target and for receiving target-reflected radar signals. The transceiver includes means for multiple-pass time-reversing the transmitted and received radar signals whereby coherent beam focusing is realized at both the target and at the receiver to thereby enhance the resolution of the acquired target image.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: May 19, 2009
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Joon Y Choe, Eung Gi Paek
  • Patent number: 7525482
    Abstract: An adaptive antenna system may be used with a GPS system to improve operation in the presence of interference signals. A resulting adapted antenna pattern will cause array pattern distortions affecting GPS satellite signals received at some signal arrival angles. By determining values of array factor distortions applicable to a GPS satellite signal received at a specific arrival angle via a specific adapted array pattern, a correction signal may be developed for use to mitigate the effect of the applicable array factor distortion. By use of satellite angle data, navigational data, or both, a predictive angle value of a future arrival angle of a satellite signal may be identified. By developing a correction signal applicable to that future arrival angle, corrections for arriving signals can be applied without reliance on stale values. Corrections may be made to the received satellite signal or may be supplied to the GPS system for corrective use during processing of the received signal.
    Type: Grant
    Filed: May 17, 2007
    Date of Patent: April 28, 2009
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Raymond J. Lackey, Bryan Tropper, Sondra E. Somin, legal representative, Martin E. Somin
  • Publication number: 20090102716
    Abstract: A system and methods for radar and communications applications. In one embodiment the present system comprises a wireless, space-fed, phased array of antennas including a plurality of unit cells. A first one of the unit cells includes a first one of the antennas and a unit cell command interpreter configured to receive a command, determine whether the command is intended for the first unit cell, and relay the command to logic for enabling a phase shift controller of the first antenna. In one embodiment the present methods comprise the step of wirelessly beaming microwave power from a power and control beam transmit unit to illuminate a wireless, space-fed, phased array of antennas including a plurality of unit cells. The method further comprises the steps of beaming a command to the array and converting the microwave power into direct current within a first one of the unit cells. The first unit cell includes a first one of the antennas.
    Type: Application
    Filed: October 23, 2007
    Publication date: April 23, 2009
    Inventor: Daniel J. Sego
  • Patent number: 7522095
    Abstract: A polygonal cylindrically shaped phased array antenna forming a radar has an active aperture that focuses in any of one or more angular azimuth directions without inertia. It further includes adjacent multiple similar polygonal staves joined along their vertical edges to form a right regular polygonal cylinder. Each stave is further decomposed into flat panels, wherein each panel has a plurality of antenna elements positioned in a regular rectangular or triangular lattice. Each panel contains a beam forming network that electronically forms and steers an electromagnetic beam for purposes of transmission and subsequent reception. The panels optionally may operate as autonomous radars which when coherently combined form multiple larger antenna apertures, each capable of operating autonomously. A switching network allows transmit power and all requisite radar and control signals to be sent to and received from a selected set of panels anywhere on the polygonal cylinder.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: April 21, 2009
    Assignee: Lockheed Martin Corporation
    Inventors: Richard Wasiewicz, Peter H. Stockmann
  • Patent number: 7522097
    Abstract: A method to compensate for radar platform angular motion may include measuring or estimating any radar platform angular motion. The method may also include substantially decoupling each array subsection response of a plurality of array subsection responses from any radar platform angular motion by applying continuous time varying phase adjustments to each individual array subsection response, prior to forming composite array Sum and monopulse Delta beam responses The time varying phase adjustments may be determined in response to any radar platform angular motion measured or estimated.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: April 21, 2009
    Assignee: The Boeing Company
    Inventor: David R. Wakeman
  • Patent number: 7522552
    Abstract: Described herein is a device to be used in a wireless communication system with CSMA-based MAC, comprising a mechanism for transmitting at least a first and second Request-to-Send (RTS) messages and at least first and second data packets on a transmission medium, and a spatially selective antenna. In one aspect, the device uses a distributed antenna that combines the antenna elements of several devices and the device observes the transmissions of other devices, analyzes the observed transmissions for transmission patterns and adapts its own transmissions to the detected transmission patterns. Also described is a corresponding system, method and computer program to be used in a wireless communication system.
    Type: Grant
    Filed: November 9, 2004
    Date of Patent: April 21, 2009
    Assignee: Patents - Professional Solutions (PRO-PATS) Ltd
    Inventors: Yaron Fein, Yaron Peleg
  • Patent number: 7508338
    Abstract: An element support and thermal control arrangement for an active array antenna, preferably modular, using line-replaceable units (LRUs), includes a radiating-side liquid-cooled cold plate lying parallel with a liquid-cooled TR coldplate. Antenna elements are supported and cooled by the radiating cold plate, and a beamformer lies between the radiating and TR coldplates. A plurality of column coldplates are attached to the rear of the TR coldplate and define bays or volumes in which power LRUs can be fitted in thermal communication with the TR coldplate, the column coldplates, or both.
    Type: Grant
    Filed: October 20, 2006
    Date of Patent: March 24, 2009
    Assignee: Lockheed Martin Corporation
    Inventors: Brian Pluymers, Marc T. Angelucci, John Fraschilla, Stuart R. Ducker, IV, Thomas E. McGuigan, Robert B. Lewis, Richard J. Heinrich, Daniel W. Harris
  • Patent number: 7505791
    Abstract: An antenna setting apparatus that allows a user to receive a broadcast from a desired direction easily and excellently is configured as follows: an antenna setting apparatus includes: a control unit changing the direction of a smart antenna with high sensitivity; a tuner extracting a signal; a CPU controlling the control unit, controlling the frequency of the signal extracted by the tuner and controlling the control unit to change the direction with high sensitivity; an OSD outputting an information set represented by the signal; a remote control reception unit accepting a selection; a first area of a memory storing an information set, where the information set is stored in association with the direction of the smart antenna and the frequency of the signal; and a second area of the memory storing the direction and the frequency corresponding to the information set designated by the selection.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: March 17, 2009
    Assignee: Funai Electric Co., Ltd.
    Inventor: Naoki Yamamoto
  • Publication number: 20090058724
    Abstract: A method and system for analog beamforming in wireless communication system, is provided. Analog beamforming coefficients are constructed by performing an iterative beam acquisition process based on beam search training, and determining optimized beamforming weighting coefficients based on the iterative beam acquisition process.
    Type: Application
    Filed: September 5, 2007
    Publication date: March 5, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Pengfei Xia, Huaning Niu, Chiu Ngo
  • Patent number: 7499727
    Abstract: A communications apparatus using an adaptive antenna having in a high frequency unit an antenna unit including a plurality of antenna elements and a plurality of adjustment units, provided corresponding to the plurality of antenna elements, for adjusting directivity of an entire antenna, the communications apparatus including an interference wave element extraction unit for extracting an interference wave element other than a requested signal from a received signal by the antenna unit when an adjustment value of the adjustment unit is perturbed in a one symbol time, and an adaptive control unit for performing adaptive control on the adjustment value such that the extracted interference wave element can be minimized.
    Type: Grant
    Filed: January 9, 2004
    Date of Patent: March 3, 2009
    Assignee: Fujitsu Limited
    Inventors: Yuta Nakaya, Takeshi Toda, Yasuyuki Oishi, Shinsuke Hara
  • Publication number: 20090051592
    Abstract: In a technique for communication with a station on a wireless network, the technique includes forming a plurality of narrow-band beams, each having a different angular direction from an antenna of a base station and collectively distributed over a beamspace to form a pseudo-omni-directional beam pattern. That beamspace may span an entire spherical region or a portion thereof, for example, when the narrow-band beams are broadcast over a sector of an entire spherical region. The technique may assign each of the plurality of narrow-band beams to a different frequency band (such as a different channel band or sub-channel) on the wireless network. The technique may simultaneously broadcast the plurality of narrow-band beams in a time-varying manner such that the angular direction of each of the plurality of narrow-band beams varies with time, where that variation may be random or ordered.
    Type: Application
    Filed: August 25, 2008
    Publication date: February 26, 2009
    Inventors: Jungwon Lee, Hui-Ling Lou
  • Patent number: 7496129
    Abstract: Methods and systems consistent with this invention receive a plurality of transmitted signals in a receiver having a plurality of receive elements, wherein each transmitted signal has a different spatial location. Such methods and systems receive the plurality of transmitted signals at the plurality of receive elements to form a plurality of receive element signals, form a combined signal derived from the plurality of receive element signals, and detect each of the plurality of transmitted signals from the combined signal by its different spatial location. To achieve this, methods and systems consistent with this invention generate a plurality of arbitrary phase modulation signals, and phase modulate each of the plurality of receive element signals with a different one of the phase modulation signals to form a plurality of phase modulated signals.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: February 24, 2009
    Assignee: Greenwich Technologies Associates
    Inventor: Carl M. Elam
  • Publication number: 20090046012
    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: Application
    Filed: August 11, 2008
    Publication date: February 19, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Huaning Niu, Pengfei Xia, Chiu Ngo
  • Patent number: 7492313
    Abstract: A radar system array antenna includes plural elements. Each element is coupled to a port of a transmit-receive device. Digital data representing the characteristics of the radar signal is applied to a monolithic IC combination DAC/ADC, which converts the digital data into analog transmit signal. The analog transmit signal is applied to a monolithic microwave IC transceiver, which may be monolithic with the DAC/ADC. The transceiver upconverts the transmit signal. The upconverted transmit signal is applied to a transmit port of the transmit-receive device and transmitted. Receive RF signal is coupled from each antenna element through the transmit-receive device to a receive signal port of the transceiver. The transceiver downconverts the receive signal to produce received downconverted signal. The downconverted signal is coupled to the ADC part of the DAC/ADC, which converts to receive digital signal. Digital processing processes the receive digital signal to produce the return target information.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: February 17, 2009
    Assignee: Lockheed Martin Corporation
    Inventors: Timothy Ehret, Francis Xavier McGroary
  • Patent number: 7489948
    Abstract: A receiver includes an array antenna, terminals, switches, a receiving circuit, a switch control unit and a reactance setting unit. Receiving circuit determines a received frequency and a received signal quality of a received signal by demodulating the received signal provided from the array antenna. The receiving circuit provides the received frequency to the reactance setting unit as a frequency setting signal, and provide the received signal quality to the switch control unit and the reactance setting unit. The reactance setting unit sets a set of the reactances corresponding to the received frequency in the terminals for each frequency, and the switch control unit switches connections in the switches to provide the received signal quality equal to or greater than the threshold.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: February 10, 2009
    Assignee: Advanced Telecommunications Research Institute International
    Inventors: Makoto Taromaru, Takashi Ohira, Takuma Sawaya, Hiroki Tanaka
  • Publication number: 20090033555
    Abstract: A method and system for analog beamforming for wireless communication is provided. Such analog beamforming involves performing channel sounding to obtain channel sounding information, determining statistical channel information based on the channel sounding information, and determining analog beamforming coefficients based on the statistical channel information, for analog beamforming communication over multiple antennas.
    Type: Application
    Filed: August 2, 2007
    Publication date: February 5, 2009
    Applicant: Samsung Electronics Co., Ltd
    Inventors: Huaning Niu, Pengfei Xia, Chiu Ngo
  • Publication number: 20090027265
    Abstract: The elements of a phased array antenna are driven by different frequencies, rather than the same frequency, to realize a scanning beam. The scan rate of the beam may be set arbitrarily high according to the frequencies used to drive the phased array, without expensive phase modulators. In particular, each successive element of the phased array antenna is driven with a frequency that is offset from the frequency used to drive the previous element in direct proportion to the spacing between antenna elements. Thus, for a straight line implementation of a phased array antenna with an antenna spacing offset of ?/2, the frequency offset between adjacent antenna elements is constant. For implementations of phased array antennas with another linear or a non-linear spatial relationship between antenna elements, the frequency offset between adjacent antenna elements is determined based on a linear or non-linear spatial relationship of the antenna.
    Type: Application
    Filed: June 5, 2006
    Publication date: January 29, 2009
    Inventor: Oved Zucker