Patent ID: 7573964

Claim:
A method for providing an estimation of a channel in a receiver associated with one or more of a mobile station and a base station in a Radio Access Network (RAN), the receiver capable of moving relative to a source of a signal in accordance with a relative speed, the method comprising: detecting, by the receiver, the signal within one of a plurality of frequency bandwidths associated with a corresponding plurality of filters to provide a detected one of the plurality of frequency bandwidths and wherein the detecting includes coherently accumulating a difference signal generated from at least two outputs of at least two of the plurality of filters, estimating a noise variance associated with the signal and generating a positive detection result based on coherently accumulating the difference signal, estimating the noise variance, and a detection threshold; and selecting, by the receiver, one of the plurality of filters for providing the estimation based on the detected one of the plurality of frequency bandwidths, wherein if the signal detection fails to provide the detected one of the plurality of frequency bandwidths, the selecting step selects a default one of the plurality of filters for the providing the estimation.