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Apparatus and method for estimating direction of arrival of radio wave

  • US 7,379,020 B2
  • Filed: 03/10/2006
  • Issued: 05/27/2008
  • Est. Priority Date: 03/16/2005
  • Status: Expired due to Fees
First Claim
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1. A radio wave direction-of-arrival estimation apparatus comprising:

  • an array antenna constructed from a plurality of antenna elements;

    a receiver for receiving an incoming wave via each of said antenna elements of said array antenna;

    a correlation matrix calculating unit for calculating a correlation matrix from each signal received by said receiver;

    a correction matrix adding unit for adding a correction matrix having a correction value at a specific matrix element to said correlation matrix calculated by said correlation matrix calculating unit;

    an inverse matrix calculating unit for calculating an inverse matrix of said correlation matrix to which said correction matrix has been added by said correction matrix adding unit; and

    a direction-of-arrival estimating unit for estimating a direction of arrival of said incoming wave based on said inverse matrix calculated by said inverse matrix calculating unit.

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