matlab仿真PAM误码率算法 程序源码.zip

clear all;clc; t0=1;ts=0.001;ts1=0.01; ts2=0.0005; fs=1/ts;fs1=1/ts1;fs2=1/ts2; df=0.5; t=[-t0/2:ts:t0/2]; t2=[-t0/2:ts2:t0/2]; x2=sin(200*t2); m2=x2./(200*t2); w2=t0/(2*ts2)+1; m2(w2)=1; %m2=m2.*m2; [M2,mn2,df2]=fftseq(x2,ts2,df); M2=M2/fs2; N2=[M2,M2,M2,M2,M2,M2,M2,M2,M2,M2,M2,M2,M2]; f2=[-7*df2*length(mn2):df2:6*df2*length(mn2)-df2]-fs2/2; subplot(211);stem(t2,m2); xlabel('time'); subplot(212);plot(f2,abs(fftshift(N2)));