Patent ID: 7079595
Filing Date: 2006-07-18
Classification: H04L

Abstract:
1. A frequency modulation (FM) radio receiver having direct current (DC) offset compensation, the FM radio receiver comprises: low noise amplifier operably coupled to amplify a radio frequency (RF) signal to produce an amplified RF signal; down conversion mixing module operably coupled to mix a local oscillation with the amplified RF signal to produce a low intermediate frequency (IF) signal; local oscillation module operably coupled to produce the local oscillation based on a reference oscillation and a DC offset correction signal; bandpass filter operably coupled to filter the low IF signal to produce a filtered signal; demodulation module operably coupled to demodulate the low IF signal to produce demodulated data; and DC offset estimation module operably coupled to determine DC offset of the demodulated data by determining peak and valley magnitudes of the demodulated data and by interpreting the peak and valley magnitudes with reference to determine the DC offset, the DC offset estimation module to generate the DC offset correction signal based on the determined DC offset.