(A CT periodic signal sampled at different frequencies)
(A CT periodic signal sampled at different frequencies)
 
Line 26: Line 26:
 
FIGURE(2)
 
FIGURE(2)
 
not a periodic graph
 
not a periodic graph
 +
 +
 +
 +
== Making periodic signal by shifting and summing aperiodic signals ==
 +
I used y=t signal to shift and make periodic signal.
 +
<pre>
 +
t=[0:0.1:5]
 +
t1=[5:0.1:10]
 +
t2=[10:0.1:15]
 +
y=t
 +
hold on
 +
plot(t,y)
 +
y1=(t)
 +
plot(t1,y1)
 +
y2=(t)
 +
plot(t2,y2)
 +
hold off
 +
</pre>
 +
[[Image:Part2_ECE301Fall2008mboutin.jpg]]

Latest revision as of 15:32, 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


Making periodic signal by shifting and summing aperiodic signals

I used y=t signal to shift and make periodic signal.

t=[0:0.1:5]
t1=[5:0.1:10]
t2=[10:0.1:15]
y=t
hold on
plot(t,y)
y1=(t)
plot(t1,y1)
y2=(t)
plot(t2,y2)
hold off

Part2 ECE301Fall2008mboutin.jpg

Alumni Liaison

Correspondence Chess Grandmaster and Purdue Alumni

Prof. Dan Fleetwood