How about minimizing the square error? J=>(a[n]-s[nj)2 Mean square error(MSE) m Example:Estimating DC in white noise xln A+wln] whxiong@uestc.edu.cn 4whxiong@uestc.edu.cn 4 J = Mean square error (MSE) X n (x[n] ¡ s[n]) 2 How about minimizing the square error? Example: Estimating DC in white noise x[n] = A + w[n]