Patent ID: 7428262

Claim:
A method for channel estimation in a rake receiver of a CDMA communication system, the method comprising the steps of: providing a finite-impulse-response channel estimation filter with L taps and having a fixed delay; inputting a pilot sequence of a received sequence of data from a channel of the communication system on the rake receiver; determining a quality of the channel of the communication system and a bandwidth of the filter to accommodate the channel quality; adjusting the bandwidth of the filter to accommodate the channel quality while keeping the fixed delay; and operating on the received sequence of data with the channel estimation filter; wherein the determining step includes calculating the filter coefficients for a filter length, and wherein if the number of coefficients calculated correspond to a length that exceeds twice the fixed delay, the adjusting step includes applying the filter coefficients to the taps in an asymmetrical manner about the filter delay over the filter length while applying zeros to the taps outside the filter length.