Patent ID: 7286593

Claim:
A channel estimator for determining channel weighting coefficients for a finger of a RAKE receiver, said channel estimator comprising: a correlator configured to receive a pilot channel signal and to correlate said pilot channel signal with a pilot channel chip pattern to produce a pilot channel symbol sequence; and a channel estimation filter configured to receive said pilot channel symbol sequence and to generate channel weighting coefficients, wherein said channel estimation filter is configured to minimize a mean squared error of a channel estimate in said channel weighting coefficients caused by at least one of: additive noise and Doppler effects, wherein said mean squared error is minimized across a range of Doppler frequencies from 0 Hz up to a specified maximum Doppler frequency; wherein the channel estimation filter comprises a first filter, a second filter, and an adder, the adder configured to sum outputs of the first and second filters, and inputs of the second filter comprising outputs of the adder.