A real valued N point sequence x(n) is called DFT bandlimited if its DFT X(k) 0 for k 0 k N k 0 We insert (L 1)N zeros in the middle of X(k) to obtain the following LN point DFT Explain the meaning of this type of processing by working out an example with N 4, L 1, and X(k) 1, 0, 0, 1 X (k) 0 0 k ko 1 X'(k) LN ku 1

Question: A real-valued N-point sequence x(n) is called DFT bandlimited if its DFT X(k) = 0 for k 0 ? k ? N ? k 0

A real-valued N-point sequence x(n) is called DFT bandlimited if its DFT X(k) = 0 for k₀ ? k ? N ? k₀. We insert (L ? 1)N zeros in the middle of X(k) to obtain the following LN-point DFT

X (k). 0. 0 < k < ko - 1 X'(k) =

Explain the meaning of this type of processing by working out an example with N = 4, L = 1, and X(k) = {1, 0, 0, 1}

X (k). 0. 0 < k < ko - 1 X'(k) = LN - ku + 1

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