Composite Test-two-sided test E.g.,Any value of DC in WGN with known noise statistics Ho xIn]wln] n=0,1..N-1 H xin]=A+wln] whxiong@uestc.edu.cn 12whxiong@uestc.edu.cn Composite Test—two-sided test 12 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]