Sampling Theorem: Let x(t) be a band-limited signal with X(j w) = 0 for |W| >Wm.
Then x(t) is uniquely determined by its samples x(nT) = 0,(+,-)[1,2,3]. . ., if
Ws > 2 * Wm,
where
Ws = (2* pi ) / T .
For example if W(x) =
