Transform Domain Adaptive Filtering Using a Recursive DFT

摘要

This paper discusses the use of a recursive DFT (discrete Fourier transform) with frequency-domain adaptive filters. We show that, even though the recursive DFT ordinarily has stability problems when implemented in finite precision arithmetic, it is stable when used with an appropriate numerical roundoff procedure, making it practical for use with frequency-sampling type adaptive filters. 10 refs., 4 figs., 1 tab. (ERA citation 10:026546)