(→Part 2) |
(→Part 2) |
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==Part 2== | ==Part 2== | ||
This is <math>x(t)=e^{-t}cos(20t)</math> as the nonperiodic signal. | This is <math>x(t)=e^{-t}cos(20t)</math> as the nonperiodic signal. | ||
| − | [[image: | + | [[image:ctsignal1|300px|frame|center]] |
Revision as of 14:06, 12 September 2008
Part 1
Choose the signal $ x(t)=cos(t) $ which is periodic.
File:Ctsignal.jpg
300px
Sampling ever interger yields
File:Dtsignal.jpg
300px
This is $ x[n]=cos(n) $
but sampling at a frequency of $ \pi/4 $ yields
File:Dtsignal1.jpg
300px
This is $ x[n]=cos(\pi/4n) $
Part 2
This is $ x(t)=e^{-t}cos(20t) $ as the nonperiodic signal.
File:Ctsignal1
300px
