Multidelay block frequency domain adaptive filter

The Multidelay block frequency domain adaptive filter (MDF) algorithm is a block-based frequency domain implementation of the (normalised) Least mean squares filter (LMS) algorithm. The Multidelay block frequency domain adaptive filter (MDF) algorithm is a block-based frequency domain implementation of the (normalised) Least mean squares filter (LMS) algorithm. The MDF algorithm is based on the fact that convolutions may be efficiently computed in the frequency domain (thanks to the Fast Fourier Transform). However, the algorithm differs from the Fast LMS algorithm in that block size it uses may be smaller than the filter length. If both are equal, then MDF reduces to the FLMS algorithm.