Particular Composition (e.g., Of Cell Or Element) Patents (Class 455/288)
  • Patent number: 8892155
    Abstract: A method of selecting a cell or cells for use in multiple-input/multiple-output (MIMO) transmission to user equipment or a relay station in a serving cell of a cellular wireless network, there being a set of N cells of the cellular network from which a selection of cells is to be made, N being an integral number greater than one and the set including the serving cell, the received signal power of the serving cell and the received interference power of the other cells in the set relative to the serving cell are sorted in descending order of power P, such that P0?P1? . . . ?PN-1, and a group of M cells are selected from the said set of N cells, where the cells selected are those giving the smallest value of M for which the inequality ? k = 0 M - 1 ? P k ? ? ? ? i = 0 N - 1 ? P i is satisfied, ? being a first decision threshold parameter.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: November 18, 2014
    Assignee: Fujitsu Limited
    Inventors: Hui Xiao, Luciano Pietro Giacomo Sarperi
  • Patent number: 8315562
    Abstract: A method for improving RFID readers includes transmitting an outgoing RF signal to an antenna through a directional device, and generating a demodulated vector signal from an RF signal related to the RF signal received from the receiver. The method also includes setting the impedance of a controllable-variable-reflectance element with control-parameters from a memory circuit. The memory circuit includes a look up table having therein a corresponding relationship between the control-parameters and an error vector related to the demodulated vector signal.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: November 20, 2012
    Assignee: Symbol Technologies, Inc.
    Inventors: Mark Duron, Richard T. Knadle, Jr.
  • Patent number: 8155614
    Abstract: Apparatus including a matrix; a plurality of magnetic particles distributed in at least a portion of the matrix; the matrix being configured to enable the plurality of magnetic particles to move position relative to one another, and at least a portion of the plurality of magnetic particles being configured to magnetically repel one or more adjacent magnetic particles.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: April 10, 2012
    Assignee: Nokia Corporation
    Inventors: Eira Tuulia Seppala, Vladimir Alexsandrovich Ermolov, Pirjo Marjaana Pasanen, Markku Anttoni Oksanen
  • Patent number: 7990307
    Abstract: The integrity of operation of a GPS precision aircraft approach and landing system may be compromised by error producing effects of reflected multipath signals. An integrity monitor antenna system as disclosed may utilize both attenuation and shadowing of reflected multipath GPS signals to achieve extreme multipath mitigation of the order of 50 dB suppression. An antenna with a right-hand circular polarization pattern having a sharp cut off at the horizon may provide 30 dB suppression of reflected multipath signals. A signal absorbent ground plane bed of defined dimensions may provide 20 dB attenuation of incident multipath signals. A signal/processor may be employed to derive position error data for integrity monitoring, based upon differentials between a known fixed location and a current GPS-indicated location. Communication of identification of a subset of particular GPS satellites for common usage may also reduce potential error levels.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: August 2, 2011
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventor: Alfred R. Lopez
  • Patent number: 7689170
    Abstract: A radio frequency (RF) receiver and receiving method are provided which can remove a leakage component from a received signal by using a local signal. In the RF receiver, a noise removing unit controls a gain and a phase of a local signal LOI according to a phase THETA and a gain AMPTD detected in a MODEM, estimates a signal Vcal corresponding to a noise component introduced into a received RF signal RXIN, and removes the estimated signal Vcal from the received RF signal RXIN. In this manner, a clean RF signal RXO, which does not include a noise component, is frequency-down converted in a receiving unit.
    Type: Grant
    Filed: May 1, 2006
    Date of Patent: March 30, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ick Jin Kwon, Heung Bae Lee
  • Patent number: 7239858
    Abstract: An RFID reader accessible thorough a personal computer and includes a PC card interface and a controller both operating according to clock signals from a crystal oscillator. The RFID reader further includes a linearized power amplifier modulator in a transmit path, a receive chain capable of demodulating either class_1 or class _0 signals from RFID tags, and an integrated switching device for selecting one of a plurality of antenna for transmitting or receiving RF signals.
    Type: Grant
    Filed: December 23, 2004
    Date of Patent: July 3, 2007
    Assignee: WJ Communications, Inc.
    Inventor: John Vincent Bellantoni
  • Patent number: 7127274
    Abstract: In wireless communications, a method and system for enhancing signal decoding capability in null areas uses dithering to break up or modify the null areas. The null areas form in overlapping regions of the beams of two antennas or in overlapping regions of a single signal that is subject to multipath. Dithering is used to spread the null areas over a wider region so that a WTRU in an overlap region will not statically remain within a null area.
    Type: Grant
    Filed: June 19, 2003
    Date of Patent: October 24, 2006
    Assignee: InterDigital Ttechnology Corporation
    Inventor: Steven Jeffrey Goldberg
  • Patent number: 6950643
    Abstract: The invention features a filter arrangement for filtering an input signal that includes a transmitter signal having a predetermined pulse shape at a receiving end to transmit the input signal, a decimation filter to decimate the input signal that includes a passband frequency range and a wide transition frequency range with an amplitude attenuation, and a matching filter to match the input signal to the pulse shape of the transmitter signal. Such filter arrangements also feature passband frequency ranges for decimation filters which are smaller than the ranges for matching filters.
    Type: Grant
    Filed: October 11, 2000
    Date of Patent: September 27, 2005
    Assignee: Infineon Technologies AG
    Inventors: Andreas Menkhoff, Peter Schoellhorn
  • Publication number: 20040198292
    Abstract: Provided is an apparatus adapted to transmit a first channel on at least two adjacent fixed beams of a plurality of fixed beams defining a coverage area, with each pair of adjacent fixed beams of the plurality of fixed beams partially overlapping and having substantially orthogonal polarizations. The apparatus has a respective transmitter adapted to transmit on each of the plurality of fixed beams a respective unique composite signal, each composite signal containing said first channel and a respective unique traffic channel.
    Type: Application
    Filed: June 27, 2002
    Publication date: October 7, 2004
    Inventors: Martin S. Smith, Chris R. Ward, Fiona M. Wilson, Keith S. Wilson
  • Patent number: 5930680
    Abstract: A C-Band or Ku-Band satellite communication system uses a relatively small receiving antenna while operating within current FCC designated bandwidth and using existing satellite configurations. Aperture synthesis techniques create nulls in orbit locations from which potential interference is expected. Bandwidth inefficient modulation techniques reduce transmission power flux density. Video compression reduces the power necessary to transmit video information. These three features make possible a receiving antenna with a receiving area equivalent to that of a three foot diameter dish, at C-Band frequencies. Comparable reductions are possible for Ku-, Ka-, Sand L-Band systems. Compressing the data reduces the required transmitted power by a factor of ten. Spreading the bandwidth reduces the power density below the FCC limitation.
    Type: Grant
    Filed: January 9, 1997
    Date of Patent: July 27, 1999
    Assignee: Terrastar, Inc.
    Inventor: Bruce B. Lusignan