5.5.2 Matched-filter type demodulator A Matched Filter (MF)to s(t)is defined as a LTI filter whose impulse response is as h(1)=Cs(T-1),where C is any non-zero constant and T is a given sample-time.. The SNR is defined as, Consider a signal s(t)b 2GgE 2E, n(t)is AWGN.Suppose that r(t NoGE No Sampling r() y() (T) MF is the optimal filter h(r) when h(t)=Cs(T-t) Compute, T)=h0*r0lhr=∫h(r)rt-r)dr,=∫hr)rT-r)dr =∫h(r)s(T-x)dr+∫hr)n(T-x)dr UESTC-Digital transmission through the AWGN channel Prof李晓峰 7