Patent ID: 8175192

Claim:
A method for use by a communications receiver for receiving an AC signal having a first-channel and a second-channel and determining a DC offset in said first-channel, said method comprising: receiving a plurality of first-channel samples and a plurality of second-channel samples by said communications receiver; detecting a first sign change in said plurality of second-channel samples; storing a negative first-channel sample selected from said plurality of first-channel samples in response to said detecting said first sign change, said negative first-channel sample corresponding to said first sign change in said plurality of second-channel samples; detecting a second sign change in said plurality of second-channel samples; storing a positive first-channel sample selected from said plurality of first-channel samples in response to said detecting said second sign change, said positive first-channel sample corresponding to said second sign change in said plurality of second-channel samples; determining an average value of said negative first-channel sample and said positive first-channel sample, said average value being said DC offset in said first-channel.