Patent ID: 7206564

Claim:
A multi stage filter to implement an adaptive filtering algorithm that services enhanced data rate modulation format signals in a cellular wireless communications system, the multi stage filter comprising: a first stage filter having a first bandwidth, wherein the first stage filter receives and filters an input signal to produce a first stage output signal; a second stage filter operably coupled to the first stage filter, wherein the second stage filter has a second bandwidth, wherein the second bandwidth is narrower than the first bandwidth, and wherein the second stage filter receives and filters the first stage output signal to produce a second stage output signal; and a processing module operable to: determine a first stage performance measurement associated with the first stage output signal; determine a multi stage performance measurement associated with the second stage output signal; compare the first stage performance measurement and the multi stage performance measurement; and select a first mode of operation wherein the first stage output signal is selected as a multi stage filter output when the first stage performance measurement compares favorably with the second stage performance measurement; or select a second mode of operation wherein the second stage output signal is selected as the multi stage filter output when the first stage performance measurement compares unfavorably with the multi stage performance measurement.