Documentation

This is machine translation

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

Note: This page has been translated by MathWorks. Please click here
To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.

dfilt.dffirt

Discrete-time, direct-form FIR transposed filter

Syntax

Hd = dfilt.dffirt(b)
Hd = dfilt.dffirt

Description

Hd = dfilt.dffirt(b) returns a discrete-time, direct-form FIR transposed filter, Hd, with numerator coefficients b.

Hd = dfilt.dffirt returns a default, discrete-time, direct-form FIR transposed filter, Hd, with b=1. This filter passes the input through to the output unchanged.

The resulting filter states column vector is

(z(1)z(2))

Examples

Create a direct-form FIR transposed discrete-time filter with coefficients from a 30th order lowpass equiripple design:

b = firpm(30,[0 .1 .2 .5]*2,[1 1 0 0]);
Hd = dfilt.dffirt(b)

Introduced before R2006a

Was this topic helpful?