## ChirpZ transform

Purpose

Description

Macro Synopsis

Modules

Related Functions

### Purpose

ChirpZ transform

### Description

"ChirpZ transform" calculates the Chirp z-transform of the given
signal x which is the z-transform of the signal along a spiral
contour defined by
the parameters
- number N of points in the z-plane
- initial magnitude (or radius) r
- initial phase angle
`ph` (in radians)
- magnitude multiplier a
- phase increment
`dph` (in radians).

Note: The discrete Fourier transform is a special case of the Chirp
z-transform with ph=0, r=1, dph= and N being
half the length of x (in samples).

### Macro Synopsis

`y = ChirpZTrafo(x,N,r,ph,a,dph);`

signal x,y;

int N;

float r,ph,a,dph;

### Modules

Spectral

### Related Functions

Fourier transform