Signals and Systems

11.9 RADIX-2 FFT ALGORITHM

This algorithm is based on the divide and conquer approach and the N point DFT is decomposed into smaller DFTs and hence the number of computations is reduced. The value of N is selected such that N = 2^V. This algorithm is known as Radix-2 or radix of these algorithms is ‘2’ because the N point DFT is decomposed successively such that smallest DFT size will be N = 2.