Composite Test-two-sided test E.g.,Any value of DC in WGN with known noise statistics Ho xIn]wln] n=0,1..W-1 H xIn]=A+wIn] Following the NP rule,we have detection statistics T)=∑m But,the threshold is different whxiong@uestc.edu.cn 14whxiong@uestc.edu.cn Composite Test—two-sided test 14 E.g., Any value of DC in WGN with known noise statistics H0 x[n] = w[n] n=0,1…N-1 H1 x[n] = A + w[n] Following the NP rule, we have detection statistics T(x) = 1 N Xx[n] But, the threshold is different