Signal Processing Toolbox

dfilt.dffir

Construct a discrete-time, direct form, finite impulse response filter object

Syntax

• Hd = dfilt.dffir(b)
  Hd = dfilt.dffir
  

Description

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

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

Examples

Specify a second-order direct form FIR filter structure for a dfilt object, Hd, with the following code:

• b = [0.05 0.9 0.05];
  Hd = dfilt.dffir(b)
  Hd =
   
      FilterStructure: 'Direct form FIR'
            Numerator: [0.0500 0.9000 0.0500]
  

See Also

dfilt, dfilt.dfasymfir, dfilt.dffirt, dfilt.dfsymfir

dfilt.dfasymfir

dfilt.dffirt