(→Periodic Signals Revisited) |
(→Periodic Signals Revisited) |
||
| Line 9: | Line 9: | ||
[[Image:Samprate1_ECE301Fall2008mboutin.jpg]] | [[Image:Samprate1_ECE301Fall2008mboutin.jpg]] | ||
| − | <math>y[n]=sin[n] \!</math> with a sample rate of <math>pi/ | + | <math>y[n]=sin[n] \!</math> with a sample rate of <math>pi/4 \!</math> |
| + | [[Image:Samprate2_ECE301Fall2008mboutin.jpg]] | ||
Revision as of 19:08, 11 September 2008
Periodic Signals Revisited
1. By sampling at different frequencies the function $ y=sin(x)\! $ can appear as both periodic and non-periodic in DT. For example:
$ y(x)=sin(x) \! $ in CT
$ y[n]=sin[n] \! $ with a sample rate of 1
$ y[n]=sin[n] \! $ with a sample rate of $ pi/4 \! $
