10.2-2 In the coherent detection of binary chirp modulations, the transmission over 0 ≤t ≤ This A cos(apr²+00), if "O" is sent A cos(a11+01), if "1" is sent The channel noise is AWGN with spectrum N/2. The binary digits are equally likely. (a) Design the optimum receiver. (b) Find the probability of bit error for the optimum receiver in part (a).