Patent ID: 7457379

Claim:
A DC offset compensator to remove a DC offset from an input signal, wherein the DC offset compensator comprises: an average DC estimate and correction stage, wherein the average DC estimate and correction stage receives the input signal and performs DC average compensation; a circle fitting (CF) estimation and correction stage operably coupled to the average DC estimate and correction stage, wherein the CF estimation and correction stage performs CF DC offset compensation on an output of the average DC estimate and correction stage; a linear minimum mean square error (LMMSE) DC estimation and signal to interference ratio (SIR) estimation stage, wherein the LMMSE DC estimation and SIR estimation stage performs LMMSE DC offset compensation on an output of the CF estimation and correlation stage; and a combined DC estimation and correction stage, wherein the combined DC estimation and correction stage produces a combined output signal based on the output of the CF estimation and correction stage and the output of the LMMSE DC estimation and SIR estimation stage.