1. A subsystem for estimating the frequency offset between a transmitter and a receiver, the receiver having signals including pre-detection signal samples and detected symbols, the subsystem comprising: a) a first processing stage, coupled to the pre-detection signal samples and the detected symbols, the first processing stage generating first processed samples; b) a time averaging stage, having a samples input and a first estimate indication output, the first estimate indication being a time average of the input samples; and c) an atypical samples stage, coupled to receive the first processed samples and the first estimate indication, the atypical samples stage having a sample status indication selectively characterizing particular first processed samples as typical.