Question: We wish to compute the autocorrelation function of an upsampled signal, as indicated in Figure. It is suggested that this can equivalently be accomplished with

We wish to compute the autocorrelation function of an upsampled signal, as indicated in Figure. It is suggested that this can equivalently be accomplished with the system of Figure. Can H₂(e^j?) be chosen so that ?₃[n] =??₁[n]? If not, why not? If so, specify H₂(e^?j?).?

Ideal lowpass filter cutoff Autocorrelate x,[n] x|n] 7/L Autocorrelate H.(e) x(n]

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