Patent ID: 6654596
Filing Date: 2003-11-25
Classification: H03D,H04B

Abstract:
A homodyne radio receiver apparatus, comprising a homodyne radio receiver device (1,2,3,4,5,5â€²) 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 (1,2,3,4,5,5â€²) for determining a DC-level estimate of said samples, wherein said DC compensation means (7) comprises average calculator means (8,8â€²) for calculating an average DC-level of said samples, characterized in that said DC compensation means (7) further comprises signed square sum calculator means (9,9â€²) 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 (10,10â€²) for subtracting an output of said square sum calculator means (9,9â€²) from an output of said average calculator means (8,8â€²) for forming said DC-level estimate.