Consider a finite-length sequence x[n] such that x[n] = 0 forn < 0 and n ≥ L. Let X[k] be the N-point DFT of the sequence x[n], whereN > L. Define cxx[m] to be the aperiodic autocorrelation function of x[n]; i.e.,
(a) Determine the minimum value of N that can be used for the DFT if we require that
(b) Determine the minimum value of N that can be used for the DFT if we require that
Where M
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