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Matching filter calculating correlation valve utilizing exclusive-or of two data and exclusive-or of two codes corresponding to the input data

  • US 6,724,812 B2
  • Filed: 11/30/2000
  • Issued: 04/20/2004
  • Est. Priority Date: 11/30/1999
  • Status: Expired due to Fees
First Claim
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1. A matched filter for calculating a correlation value between an input data sequence of a specified length and a code sequence of a specified length, comprising:

  • a circuit calculating an exclusive-OR of an input data and a delayed input data;

    a circuit calculating an exclusive-OR of two codes corresponding to the two input data, respectively; and

    a correlation calculating means that, using the exclusive-OR of the two input data, one of the two input data, the exclusive-OR of the two codes, and the code corresponding to one of the two input data, calculates a correlation value of the input data and the two codes.

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