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
Design a Fractional Delay Farrow Filter
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]; farrow = 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); cubicfarrow = design(d,'lagrange','FilterStructure','farrowfd'); grpdelay(cubicfarrow)
Version History
Introduced in R2011a
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