The Application of Recursive Fast Fourier Transformation(RFFT) to System Identification

RFFT is a recursive algorithm based on Fast Fourier Transformation.Because ofthe arbitrary choice of the section of input sequence and the times of recursion,thismethod is more flexible and useful in time-varying spectrum analysis and on-lineidentification of self-adaptive control system.A microcomputer system with RFFT algorithm for identification is given in this paper.