ex2p8.m

关于数字信号处理的一些matlab例程

x=[3,11,7,0,-1,4,2];nx=[-3:3];
[y,ny]=sigshift(x,nx,2);
w=randn(1,length(y));nw=nx;
[y,ny]=sigadd(y,ny,w,nw);
[x,nx]=sigfold(x,nx);
[rxy,nrxy]=conv_m(y,ny,x,nx);
subplot(2,1,1),subplot(2,1,1);stem(nrxy,rxy)
axis([-4,8,-50,250]);xlabel('lag variable 1')
ylabel('rxy');title('crosscorrelation;noise sequence 1')

x=[3,11,7,0,-1,4,2];nx=[-3:3];
[y,ny]=sigshift(x,nx,2);
w=randn(1,length(y));nw=nx;
[y,ny]=sigadd(y,ny,w,nw);
[x,nx]=sigfold(x,nx);
[rxy,nrxy]=conv_m(y,ny,x,nx);
subplot(2,1,2);stem(nrxy,rxy)
axis([-4,8,-50,250]);xlabel('lag variable 1')
ylabel('rxy');title('crosscorrelation;noise sequence 2')