Patent ID: 8611467

Claim:
A method, comprising: receiving a baseband signal; determining a direct current (DC) characteristic of the baseband signal; generating a correction signal when the DC characteristic has a value that is outside of a predetermined range, the predetermined range having a lower threshold and an upper threshold, wherein the generating comprises: determining a step size based at least in part on a predetermined number of consecutive increases or decreases of a counter value with respect to the upper threshold or the lower threshold, respectively; and adjusting the correction signal based at least in part on the step size; and injecting the correction signal into the baseband signal; and wherein determining the DC characteristic comprises: integrating the baseband signal over a first integration time into a DC error signal, the first integration time based at least in part on a measurement period; and accumulating the DC error signal into the DC characteristic over a second integration time based at least in part on the predetermined range.