Mathematical Representation of Time Decimation Decimation in Time Mathematical Represenation of Time Decimation.
Decimation is the process of breaking down something into it's constituent parts.
Decimation in time involves breaking down a signal in the time domain into smaller signals, each of which is easier to handle. But If you look at the equation you will see that the two twiddle factors are not the same between the ODD and EVEN parts of the signal, so to simplify the equation, we pull part of the twiddle factor out of the sumation.