czt

Z-chirp transform.

Namespace: dsp::fourier

Prototype

Veccf czt(const Veccf &x, int m, cfloat W, cfloat z0=1.0f)

x	Input vector
m	Number of evaluation points
W	Progression of the geometric serie
z0	Initial term

The values of \(H(z)\): \[ X\left(z_0 * W^n\right) = \sum_{k=0}^{N-1} x_k \cdot z_0^k \cdot W^{nk},\quad \textrm{pour }n=0,1,...,m-1 \]

Evaluate the z transform on the following points: \(z_0 \cdot W^n\), pour \(n=0,1,...,m-1\)