Filter Design Toolbox

dfilt.calatticepc

Construct a discrete-time, coupled-allpass, power-complementary lattice filter object

Syntax

• Hd = dfilt.calatticepc(k1,k2,beta)
  Hd = dfilt.calatticepc
  

Description

Hd = dfilt.calatticepc(k1,k2) returns a discrete-time, coupled-allpass, lattice filter object, Hd, with power-complementary output. This object is two allpass lattice filter structures coupled together to produce complementary output. The lattice coefficients for each structure are vectors, k1 and k2, respectively. beta is shown in the diagram below

Hd = dfilt.calatticepc returns a default, discrete-time, coupled-allpass, lattice filter object, Hd, with power-complementary output. The default values are k1=k2=[ ], which is the default value for the dfilt.latticeallpass. The default for beta=1. This filter passes the input through to the output unchanged.

Example

Specify a third-order lattice coupled-allpass power complementary filter structure for a filter Hd with the following code.

• k1 = [0.9511 + 0.3088i; 0.7511 + 0.1158i]
  k2 = 0.7502 - 0.1218i
  beta = 0.1385 + 0.9904i
  Hd = dfilt.calattice(k1,k2,beta)
  k1 =
     0.9511 + 0.3088i
     0.7511 + 0.1158i
  k2 =
     0.7502 - 0.1218i
  beta =
     0.1385 + 0.9904i
  Hd =
      FilterStructure: 'Coupled-Allpass Lattice, Power 
                          Complementary Output'
             Allpass1: [1x1 dfilt.latticeallpass]
             Allpass2: [1x1 dfilt.latticeallpass]
                 Beta: 0.1385+ 0.9904i
  

See Also

dfilt.calattice

dfilt.latticeallpass, dfilt.latticear, dfilt.latticearma, dfilt.latticemamax, dfilt.latticemamin in your Signal Processing Toolbox documentation

dfilt.calattice

disp