題組內容

4. Consider a baseband communication system with $s_1(t)$ and $s_2(t)$ depicted in Fig. 1.

(c) (6%) Suppose now \( s_1(t) \) is fixed as that in Fig. 1 but we are allowed to design \( s_2(t) \). Find the optimal \( s_2(t) \) such that the probability of error is minimized. Fig. 1 $s_1(t)$ and $s_2(t)$.