DSP EXAM 2006
Response is 2(1+2cos(1))cos(0.5 n - 1) } = 2(2.08)cos(0.5 n - 1) } i.e. {4.16 cos(0.5n - 1) } ... For each k = 0,1, 2, …, N-1, X[k] is a sample of the spectrum X(ej() at (=2(k/N. In this case, X(ej() is the spectrum (DTFT) of an infinite discrete time signal {x[n]} comprising {x[n]}0,N-1 padded out to infinity (in both directions) with zeros. ... ................
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