Patent ID: 7903727

Claim:
A channel memory length selection method for a wireless communication system, the method comprising: estimating an initial channel impulse response (CIR) for the wireless communication system; determining a first refined CIR with a first group of taps and a second refined CIR with a second group of taps based upon the initial CIR, number of the second group of taps being less than number of the first group of taps; and selecting either the number of the first group of taps or the number of the second group of taps as the channel memory length according to an energy concentration criterion in regard to the first refined CIR and the second refined CIR, wherein the first refined CIR is determined by selecting a CIR with a maximum characteristic value among all CIRs with tap counts equal to the number of the first group of taps in the initial CIR and the second refined CIR is determined by selecting another CIR with the maximum characteristic value among all CIRs with tap counts equal to the number of the second group of taps in the initial CIR; wherein the energy concentration criterion comprises a ratio of the characteristic value of the second refined CIR to the characteristic value of the first refined CIR, and the channel memory length is set according to the ratio.