(A CT periodic signal sampled at different frequencies)
(A CT periodic signal sampled at different frequencies)
Line 5: Line 5:
  
 
<pre>
 
<pre>
 
n=1:1:40
 
 
%%%%%%%%DT input%%%%%%%%%
 
%%%%%%%%DT input%%%%%%%%%
 +
n=1:1:40
 +
  
 
y=cos(pi/8*n);
 
y=cos(pi/8*n);

Revision as of 15:08, 12 September 2008

A CT periodic signal sampled at different frequencies

It is known that y=cos(x) in CT is a periodic function, and this periodic CT function was sampled at different frequencies in DT.

%%%%%%%%DT input%%%%%%%%%
n=1:1:40


y=cos(pi/8*n);
figure(1)
plot(n,y)


y2=cos(3*n);
figure(2)
plot(n,y2)

Periodicss ECE301Fall2008mboutin.jpg FIGURE(1) shows a periodic DT graph

Aperiodic ECE301Fall2008mboutin.jpg FIGURE(2) not a periodic graph

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