A continuous recursive DFT analyzer--The discrete coherent memory filter
B. Goldberg · IEEE Transactions on Acoustics Speech and Signal Processing · 1980
The discrete version of the coherent memory filter (DCMF) is introduced and it is shown that the device performs a (N point) DFT of the N input data samples. It is also shown that with a simple modification the device can be operated recursively, so that as the data samples flow in, the DFT of the last N data samples are performed continuously.