5.1. Find the optimum first-order FIR Wiener filter for estimating a signal s[n]

from a noisy real signal x[n] = s[n]+ v[n] , where v[n] is a white noise process with a variance 2

σ v that is uncorrelated with s[n]. Assume that s[n] is a first-order AR process having an autocorrelation sequence defined by rs k

( ) =α k .