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parallel

Create parallel sum filter structure

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Syntax

PF = parallel(branch1,branch2,...,branchn)

Description

PF = parallel(branch1,branch2,...,branchn) returns an object PF of type dsp.ParallelFilter. PF is a parallel structure of the filter branches branch1, branch2, ..., branchn. Each individual branch can be a filter System object™ or a scalar gain value, but at least one branch must be a filter object.

The input filter objects must be supported by the parallel function. To see a list of filter objects that you can add as branches to the parallel filter stack, run this command in the MATLAB® command prompt.

dsp.ParallelFilter.helpSupportedSystemObjects

example

Examples

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You can construct a parallel filter using the dsp.ParallelFilter object or the parallel function.

First, create the branches.

B1 = dsp.FIRFilter;
B2 = dsp.Delay(3);
B3 = 2;

Specify these branches while constructing the dsp.ParallelFilter object.

pf1 = dsp.ParallelFilter(B1,B2,B3)
pf1 = 
  dsp.ParallelFilter with properties:

          Branch1: [1x1 dsp.FIRFilter]
          Branch2: [1x1 dsp.Delay]
          Branch3: 2
    CloneBranches: true

You can also use the addBranch function to add branches to the default parallel filter.

pf2 = dsp.ParallelFilter(B1);
addBranch(pf2,B2,B3);
pf2
pf2 = 
  dsp.ParallelFilter with properties:

          Branch1: [1x1 dsp.FIRFilter]
          Branch2: [1x1 dsp.Delay]
    CloneBranches: true

Now, use the parallel filter function to construct a dsp.ParallelFilter object.

pf3 = parallel(B1,B2,B3)
pf3 = 
  dsp.ParallelFilter with properties:

          Branch1: [1x1 dsp.FIRFilter]
          Branch2: [1x1 dsp.Delay]
          Branch3: 2
    CloneBranches: true

Input Arguments

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Filter branch, specified as a filter System object or a scalar gain value. The parallel function does not create a dsp.ParallelFilter object when all input branches are scalar values. At least one branch in the structure must be a filter object.

To see a list of filter objects that you can add as branches to the parallel filter stack, run this command in the MATLAB command prompt.

dsp.ParallelFilter.helpSupportedSystemObjects

Output Arguments

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Parallel filter, returned as a System object of type dsp.ParallelFilter. For information on the properties of the filter in each branch, type info(PF) in the MATLAB command prompt.

Version History

Introduced before R2006a

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See Also