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Homodyne radio receiver having DC compensation

  • US 6,654,596 B1
  • Filed: 01/27/2000
  • Issued: 11/25/2003
  • Est. Priority Date: 01/27/1999
  • Status: Expired due to Term
First Claim
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1. A homodyne radio receiver apparatus, comprising a homodyne radio receiver device (1,2,3,4,5,5

  • ) for receiving radio frequency signal bursts of a number of symbols and generating digital samples of at least a complex base band signal (I and Q) of each signal burst, and DC compensation means (7) operatively connected to said homodyne radio receiver device (1,2,3,4,5,5

    ) for determining a DC-level estimate of said samples, wherein said DC compensation means (7) comprises average calculator means (8,8

    ) for calculating an average DC-level of said samples, characterized in that said DC compensation means (7) further comprises signed square sum calculator means (9,9

    ) for calculating a signed square sum of a plurality of said samples and weighting said square sum by a compensation factor (A), and correction means (10,10

    ) for subtracting an output of said square sum calculator means (9,9

    ) from an output of said average calculator means (8,8

    ) for forming said DC-level estimate.

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