![](https://www.opentextbooks.org.hk/sites/opentextbooks/files/book_profile/cc_icon/by-sa.png)
Available under Creative Commons-ShareAlike 4.0 International License.
Discrete-time sinusoids have the obvious form s (n)= Acos (2πfn + ϕ). As opposed to analog complex exponentials and sinusoids that can have their
frequencies be any real value, frequencies of their discrete-time counterparts yield unique waveforms only when f lies in the interval
This choice of frequency interval is
arbitrary; we can also choose the frequency to lie in the interval [0,1). How to choose a unit-length interval for a sinusoid's frequency will become evident later.
- 瀏覽次數:1344