Least Square(LS) Estimation error:MSE J(0)=(x-H0T(x-H) whxiong@uestc.edu.cn 15whxiong@uestc.edu.cn Estimation error: MSE Least Square (LS) 15 J(µ ^ ) = (x ¡ Hµ ^ ) T (x ¡ Hµ ^ )