신호와시스템

hn21=un*0.5-un21*0.5;
hn22=-(un1*0.5-un23*0.5);
hn23=hn21+hn22;
figure; orient tall;
subplot(411); stem(n,hn1); title (`h1[n]`); grid on; %hn1
axis([-10 200 -2 2]);
subplot(412); stem(n,hn23); title (`h23[n]`); grid on;
axis([-10 200 -2 2]);

y1 = conv(xn,hn1);

y2 = conv(xn,hn23);

ylen1=length(xn)+length(hn1)-1;
ny1=[-10:1:ylen1-11];
ylen2=length(xn)+length(hn23)-1;
ny2=[-10:1:ylen2-11];
subplot(413); stem(ny1,y1); title (`y1[n]=x[n]*h1[n]`); grid on;
axis([-10 200 -2 2]);