Date: Dec 30, 2012 12:16 AM
Author: ahmed
Subject: recursive DFT
how i can do a recursive discrete fourier transform(DFT) for a decaying sinusoidal signal in simulink to achieve the next algorithm :

Several discrete frequency steps are used by increasing the

time window from 32 samples per cycle to 38 samples per

cycle. That is, the measurement window is increased in

integral steps of 32, 33, 34, 35, 36, 37 to 38 samples as the

frequency is decreasing from 60 Hz to 50 Hz. A total of

seven recursive DFT calculations are implemented (one for

each of the sample window lengths) in parallel and the

appropriate phasors are selected based on the measured

frequency.

i want know how can i do that .