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An algorithm for computing 4M-point DFT based on 4-point DFT block is developed. The new algorithm, in comparison to radix-4 FFT algorithm, requires the same number of additions and multiplications, but employs a dissimilar flow-graph. In the flow-graph of the new algorithm, the 4-point DFT blocks replace the accustomed butterfly computational networks. The new algorithm permits one 4M-point DFT to...
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