Patent ID: 7835460

Claim:
A method for reducing noise in channel estimation of a communication signal comprising: a) determining a channel activity portion and a noise portion of a P-point time-domain channel estimation; b) determining a noise energy density value ŵ of channel estimates occurring during the noise portion of the channel estimation by adjusting the noise energy density value by a predetermined constant λ; c) comparing energy values of channel estimates for at least a portion of the channel estimation to the noise energy density value; and d) setting channel estimate values below a threshold to a predetermined value for each channel estimate having an energy value less than the noise energy density value, wherein ŵ is determined as: w ^ = 1 N ⁢ ∑ k = 0 N - 1 ⁢  c ^ k  2 where ĉ k is the k th channel estimate within the noise portion, N is the number of estimates in the noise portion and the values of k encompass only channel estimates in the noise portion.