acwgn.m

B3g_phase2_C语言_Matlab程序及说明

function y=acwgn(x,snr)

[M,N]=size(x);
x_energ=sum(sum(abs(x).^2))/M/N;
n_energ=10^(-snr/10)*x_energ;
n=(randn(M,N)+j*randn(M,N))*sqrt(n_energ/2);
y=x+n;
%n_energ=sum(sum(abs(n).^2))/M/N;
%10*log10(x_energ/n_energ)