Patents Examined by Hellner: Mark
  • Patent number: 4809002
    Abstract: A moving target indicator device comprising a first clutter removing circuit for responding to a radar having a variable transmit repetition time and for removing clutter having a Doppler speed of nearly zero from a radar received signal having stationary clutter and moving clutter. The device further includes a correction circuit to keep the amplitude components and the phase components of the first clutter removing circuit output substantially constant. A second clutter removing circuit removes clutter having a constant amplitude component and phase component from the output of the correction circuit.
    Type: Grant
    Filed: February 13, 1985
    Date of Patent: February 28, 1989
    Assignee: NEC Corporation
    Inventors: Fusaji Togashi, Toshihiko Hagisawa