%x = complex_awgn(0,0.36);%t = 1:30;%subplot(2,2,1);%plot(t,10*log10(abs(x)),'--b');%y1=sqrt(-log(u1)).*cos(2*pi*u2);%y2=sqrt(-log(u1)).*sin(2*pi*u2);clear;clc;N0 = 0.64;m = 0;randn('state',sum(100*clock));u1 = m + sqrt(N0/2)* randn(1,2560);randn('state',sum(100*clock));u2 = m + sqrt(N0/2)* randn(1,2560);ua = complex(u1,u2);ub = complex(u1,u2);uc = complex(u1,u2);ud = complex(u1,u2);u = ua+ub+uc+ud;%u = u./abs(u);n = mean(abs(ua).^2) n = mean(abs(u).^2) %均方根值%m = mean(u1)%t = mean(u2)pdfc = normpdf(u2,m,sqrt(N0/2));%subplot(1,2,1);plot(u2,pdfc,'b.');ylabel('f(xi)');xlabel('xi');%pdfc = normpdf(u2,m,sqrt(N0/2));%subplot(1,2,2);%plot(u2,pdfc,'b.');