ex020600.m

DSP2 using matlab v4

% Example 2.6

%

% x(n)=[3,11,7,0,-1,4,2]; nx = [-3:3]

% h(n)=[2,3,0,-5,2,1]; nh = [-1:4]

% y(n)=conv(x,h)

% input x(n)

x = [3,11,7,0,-1,4,2]; nx = [-3:3];

% impulse response h(n)

h = [2,3,0,-5,2,1]; nh = [-1:4];

subplot(1,1,1)

% plot x(k) and h(k)

subplot(2,2,1); stem(nx-0.05,x); axis([-5,5,-6,12]);

hold on; stem(nh+0.05,h,':')

title('x(k) and h(k)');xlabel('k');

text(-0.5,11,'solid: x    dashed: h'); hold off

% plot x(k) and h(-k)

subplot(2,2,2); stem(nx-0.05,x); axis([-5,5,-6,12]);

hold on; stem(-fliplr(nh)+0.05,fliplr(h),':')

title('x(k) and h(-k)');xlabel('k');

text(-0.5,-1,'n=0')

text(-0.5,11,'solid: x    dashed: h'); hold off

% plot x(k) and h(-1-k)

subplot(2,2,3); stem(nx-0.05,x); axis([-5,5,-6,12]);

hold on; stem(-fliplr(nh)+0.05-1,fliplr(h),':')

title('x(k) and h(-1-k)');xlabel('k');

text(-1.5,-1,'n=-1')

text(-0.5,11,'solid: x    dashed: h'); hold off

% plot x(k) and h(2-k)

subplot(2,2,4); stem(nx-0.05,x); axis([-5,5,-6,12]);

hold on; stem(-fliplr(nh)+0.05+2,fliplr(h),':')

title('x(k) and h(2-k)');xlabel('k');

text(2-0.5,-1,'n=2')

text(-0.5,11,'solid: x    dashed: h'); hold off

%print -deps2 ex020600.eps