cost

Implementation cost of the complex bandpass decimator

Syntax

c = cost(cbd)

Description

example

c = cost(cbd) returns a structure, c, whose fields contain information about the computation cost of implementing the complex bandpass decimator object, cbd.

Examples

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Compute the implementation cost of a complex bandpass decimator using the cost function.

Create a dsp.ComplexBandpassDecimator object. Set the DecimationFactor to 12, the CenterFrequency to 5000 Hz, and the SampleRate to 44,100 Hz.

cbp = dsp.ComplexBandpassDecimator(12,5000,44100)
cbp = 
  dsp.ComplexBandpassDecimator with properties:

                CenterFrequency: 5000
                  Specification: 'Decimation factor'
               DecimationFactor: 12
            StopbandAttenuation: 80
                TransitionWidth: 100
    MinimizeComplexCoefficients: true
                     SampleRate: 44100

Compute the implementation cost of cbp using the cost function.

c = cost(cbp)
c = struct with fields:
                      NumCoefficients: 201
                            NumStates: 379
    RealMultiplicationsPerInputSample: 44.3333
          RealAdditionsPerInputSample: 43.8333

Input Arguments

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Filter System object, specified as a dsp.ComplexBandpassDecimator System object.

Output Arguments

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Cost estimate containing these fields:

Estimated Value

Description

NumCoefficients

Number of filter coefficients (excluding coefficients with values 0, 1 or –1)

NumStates

Number of filter states

RealMultiplicationsPerInputSample

Number of real multiplication operations performed for each input sample

RealAdditionsPerInputSample

Number of real addition operations performed for each input sample

The function assumes that a complex-by-complex multiplication requires 3 real multiplications and 5 real additions.

Introduced in R2018a