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(.5, coeffs)
y = filter(Hd,1:10)
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', 'fd');
fvtool(Hd, 'Analysis', 'grpdelay')
For more information about fractional delay filter implementations,
see the "Fractional Delay Filters Using Farrow Structures"
demo, farrowdemo.
See Also
dfilt
 | dfilt.dfsymfir | | dfilt.farrowlinearfd |  |
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