Patents by Inventor David Henry Ramsey

David Henry Ramsey has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Ranging systems
    Patent number: 7259713
    Abstract: A continuous wave ranging system, comprising a modulator 2 for modulating an r.f. carrier wave in accordance with a pseudo random code, a transmitting antenna 5 for radiating the modulated signal towards a target, a receiving antenna 6 and receiver 7 for detecting the signal reflected back from the target, a correlator 8 for correlating the reflected signal with the transmitted code with a selected phase shift corresponding to the current range gate to be tested, whereby the range of the target from the system may be determined, a store 12 containing a plurality of different pseudo random codes, and selector means 13 arranged to supply to the modulator 2 and to the correlator 8 a code from the store 12 which code does not produce a breakthrough sidelobe in at least the next range gate or gates to be tested.
    Type: Grant
    Filed: August 16, 1990
    Date of Patent: August 21, 2007
    Assignee: Selex Sensors and Airborne Systems Limited
    Inventors: George Edward Matich, David Henry Ramsey, Raymond John Walls
  • Multiple target ranging system
    Patent number: 6989783
    Abstract: A continuous wave ranging system, comprising a modulator 2 for modulating an r.f. carrier wave in accordance with a pseudo-random code 3, a transmitting antenna 5 for radiating the modulated signal towards a target, a receiving antenna 6 and receiver 7 for detecting the signal reflected back from the target, a correlator 8 for correlating the reflected signal with a transmitted code with a selected phase shift 9 corresponding to the current range gate to be tested, and means 10, 11, 12 for processing the range/amplitude data from the correlator 8 to discriminate between reflections due to the target and those due to other objects adjacent to the target.
    Type: Grant
    Filed: August 16, 1990
    Date of Patent: January 24, 2006
    Assignee: BAE Systems Electronics Limited
    Inventors: George Edward Matich, David Henry Ramsey, Raymond John Walls
  • Ranging system beam steering
    Patent number: 6628228
    Abstract: An aircraft radar and altimeter system, comprising a radio transmitter and a transmitting antenna for radiating a beam of radio energy, a radio receiver and receiving antenna for receiving radio energy reflected from the ground, processing means for comparing the signal received by the receiver with the signal transmitted by the transmitter and determined from the comparison the instantaneous altitude of the aircraft above the ground, and means for changing the direction of radiation of the beam relative to the aircraft to compensate for changes in the attitude of the aircraft relative to the horizontal about at least one of the fore and aft and side-to-side axes.
    Type: Grant
    Filed: August 16, 1990
    Date of Patent: September 30, 2003
    Assignee: Bae Systems Electronics Limited
    Inventors: George Edward Matich, David Henry Ramsey, Raymond John Walls