自适应噪声对消器2页.doc

自适应噪声对消器clear allclct=0:1/1000:10-1/1000;s=sin(2*pi*t);snr=10;s_power=var(s);%var函数: 返回方差值linear_snr=10(snr/10);factor=sqrt(s_power/linear_snr);noise=randn(1,length(s)*factor;x=s+noise;%由SNR计算随机噪声x1=noise;%噪声源输入x2=noise;w1=0;%权系数初值w2=0;e=zeros(1,length(x);y=0;u=0.05;for i=1:10000%LMS算法y=w1*x1(i)+w2*x2(i);e(i)=x(i)-y;w