Documentation

This is machine translation

Translated by Microsoft
Mouse over text to see original. Click the button below to return to the English verison of the page.

dfilt.farrowfd

Fractional Delay Farrow filter

Syntax

Hd = dfilt.farrowfd(D, COEFFS)

Description

Hd = dfilt.farrowfd(D, COEFFS) Constructs a discrete-time fractional delay Farrow filter with COEFFS coefficients and D delay.

Examples

Farrow filters can be designed with the dfilt.farrowfd filter designer.

coeffs = [-1/6 1/2 -1/3 0;1/2 -1 -1/2 1;
-1/2 1/2 1 0;1/6 0 -1/6 0];
Hd = dfilt.farrowfd(0.5, coeffs);

Design a cubic fractional delay filter with the Lagrange method.

fdelay = .2; % Fractional delay
d = fdesign.fracdelay(fdelay,'N',3);
Hd = design(d, 'lagrange', 'FilterStructure', 'farrowfd');
fvtool(Hd, 'Analysis', 'grpdelay');

For more information about fractional delay filter implementations, see the "Fractional Delay Filters Using Farrow Structures" example, farrowdemo.

More About

Introduced in R2011a


Was this topic helpful?