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ELECTRONIC SCANNING RADAR APPARATUS, RECEIVED WAVE DIRECTION ESTIMATING METHOD, AND RECEIVED WAVE DIRECTION ESTIMATING PROGRAM

  • US 20120268316A1
  • Filed: 10/18/2011
  • Published: 10/25/2012
  • Est. Priority Date: 10/21/2010
  • Status: Active Grant
First Claim
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1. An electronic scanning radar apparatus mounted on a moving object, comprising:

  • a receiving unit configured to include a plurality of antennas receiving a received wave arriving from a target having reflected a transmitted wave;

    a beat signal generating unit configured to generate beat signals from the transmitted wave and the received wave;

    a frequency resolving unit configured to resolve the beat signals into beat frequencies having a predetermined frequency bandwidth and calculate complex data based on the resolved beat signals for each beat frequency; and

    an azimuth detecting unit configured to estimate a wave number of the received wave based on an eigenvalue being a component part of a normal equation having complex data as elements calculated based on the beat signals, create a coefficient calculated as a solution of a normal equation of a signal subspace formed based on eigenvalues and eigenvectors corresponding to a number of the estimated wave number, and calculate a DOA of the received wave based on the created coefficient.

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