czt

Parameters

x:

Input scalar or vector

m:

Total Number of steps

w:

ratio between points in each step

a:

point in the complex plane

Description

This is an Octave function. Chirp z-transform. Compute the frequency response starting at a and stepping by w for m steps. a is a point in the complex plane, and w is the ratio between points in each step (i.e., radius increases exponentially, and angle increases linearly).

Examples

m = 32; ## number of points desired w = exp(-j*2*pi*(f2-f1)/((m-1)*Fs)); ## freq. step of f2-f1/m a = exp(j*2*pi*f1/Fs); ## starting at frequency f1 y = czt(x, m, w, a);