SignalUtils.Czt Function

Compute the chirp z-transform.

Pascal

procedure Czt(const Src: TVec; k: integer; const Step: TCplx; const Offset: TCplx; const aResult: TVec); overload;

File

SignalUtils

Description

Compute the chirp z-transform of Src and place it in aResult. The starting frequency is defined with Offset and frequency step is defined with Step. The final frequency is at Offset + k*Step. k defines the number of frequency bins at which to estimated the amplitude and phase of the frequency. Example for computing the Step and Offset:

Step := Expj(-(FStop - FStart)*2*Pi/(k*FS));
Offset := Expj(2*Pi*FStart/FS);