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ELECTRONICALLY SCANNED RADAR SYSTEM

  • US 20100019950A1
  • Filed: 12/26/2007
  • Published: 01/28/2010
  • Est. Priority Date: 12/27/2006
  • Status: Active Grant
First Claim
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1. An electronically scanned radar system comprising:

  • a transmitting antenna for freely emitting a transmission signal consisting of a continuous wave;

    a receiving antenna consisting of antenna elements corresponding to respective channels;

    a mixer for obtaining a beat signal by mixing a reception signal received by each of the antenna elements with the transmission signal;

    an AD converter for obtaining a reception data consisting of an N number of sampled data by sampling the beat signal obtained by the mixer at a predetermined sampling frequency; and

    a target detection section for detecting a distance from a target or/and a relative speed of the a target, on the basis of the reception data sampled by the AD converter, characterized by;

    a data cutting out part for cutting out an (N−

    M+1) number of data each consisting of an M(<

    N) number of sampled data continuous in the time direction, from the reception data consisting of the N number of sampled data;

    a frequency spectrum calculation part for calculating a frequency spectrum of each of the (N−

    M+1) number of data;

    an interference frequency detection part for detecting an interference component frequency of an interference wave from the frequency spectrum;

    an interference component removal part for removing the interference component frequency from the beat signal, the interference component frequency being detected by the interference frequency detection part;

    a buffer part for merging the data cut out by the data cutting out part and removed with the frequency components to restore a data having a length before being cut out; and

    detection of a distance from the target or/and a relative speed of the target on the basis of the data restored by the buffer part.

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