How about these estimator a=∑2m E(A1)=A2+A whxiong@uestc.edu.cn 16
whxiong@uestc.edu.cn How about these estimator 16 A b 1 = 1 N Xx 2 [n] E(A b 1) = A 2 + A
How about these estimator a-∑2问 E(A1)=A2+A a=∑例 E(A2)=A whxiong@uestc.edu.cn 17
whxiong@uestc.edu.cn How about these estimator 17 A b 1 = 1 N Xx 2 [n] A b 2 = 1 N Xx[n] E(A b 1) = A 2 + A
How about these estimator A=∑2m E(A1)=A2+A a=∑m E(A2)-A How about a=-号+V∑四+ whxiong@uestc.edu.cn 18
whxiong@uestc.edu.cn How about these estimator 18 A b 3 = ¡ 1 2 + r 1 N Xx 2[n] + 1 4 A b 1 = 1 N Xx 2 [n] A b 2 = 1 N Xx[n] E(A b 1) = A 2 + A How about
How about these estimator a=∑2网 E(A1)=A2+A 高=∑m E(A2)=0 How about a=+V灯∑d+4 ®a)≠-+VE(∑2)+ whxiong@uestc.edu.cn 19
whxiong@uestc.edu.cn How about these estimator 19 A b 3 = ¡ 1 2 + r 1 N Xx 2[n] + 1 4 A b 1 = 1 N Xx 2 [n] A b 2 = 1 N Xx[n] E(A b 1) = A 2 + A E(A b 2) = 0 How about E(A b 3) 6= ¡ 1 2 + r 1 N E ³Xx 2[n] ´ + 1 4