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(t)=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 (h(r)s(T--)dr n(t)is AWGN.Suppose that r(t) E["h(t)n(T-t)dt Sampling r() y() y(T) h(r) Compute, )=h0）*ro0以lgA(ert-dr=∫lrrT-rdr =["h(c)s(-r)dr+["h(r)n(i-r)dr UESTC-Digital transmission through the AWGN channel Prof李晓峰 6