chirpzt (MathScript RT Module Function)

LabVIEW 2012 MathScript RT Module Help

Edition Date: June 2012

Part Number: 373123C-01

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Owning Class: transforms

Requires: MathScript RT Module

Syntax

e = chirpzt(a)

e = chirpzt(a, b)

e = chirpzt(a, b, c)

e = chirpzt(a, b, c, d)

Legacy Name: czt

Description

Computes the Chirp-Z transform. chirpzt computes the Chirp-Z transform in a similar manner as the FFT VI.

Examples

Inputs

Name Description
a Specifies a vector or matrix.
b Specifies the length of the transform. b is an integer. The default is length(a).
c Specifies the complex ratio (complex scalar) used in the Chirp-Z transform. Depending on the magnitude of c, LabVIEW generates either arcs or spirals as sampling points. The default is exp(-2*pi*j/b).
d Specifies the starting point (complex scalar) of the Chirp-Z transform. The default is 1.

Outputs

Name Description
e Returns the Chirp-Z transform of a. If a is a matrix, c returns the Chirp-Z transforms of all columns of a. c is a vector or matrix.

Details

The following table lists the support characteristics of this function.

 Supported in the LabVIEW Run-Time Engine Yes Supported on RT targets Yes Suitable for bounded execution times on RT Not characterized

Examples

A = [1, 2, 3, 4, 4, 3, 2, 1]
C = chirpzt(A, 8)