A method for measuring a difference in DC offsets associated with different gain settings in a direct conversion receiver having a variable gain is provided. In a first phase, a set of response parameters that characterize a time-dependent system response to a known change in the DC offset is determined....http://www.google.de/patents/US6941121?utm_source=gb-gplus-sharePatent US6941121 - Method for calibrating a DC offset cancellation level for direct conversion receivers
