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order

Order of discrete-time filter System object

Description

example

n = order(sysobj) returns the order n of the filter System object™. The order depends on the filter structure and the reference double-precision floating-point coefficients.

Examples

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Design a compensation decimator for a CIC decimator using the dsp.FilterCascade object. Determine the order of the overall filter.

cicdecim = dsp.CICDecimator('DecimationFactor', 6, ...
    'NumSections', 6);

fs = 16e3;     % Sampling frequency of input of compensation decimator
fPass = 4e3;   % Passband frequency
fStop = 4.5e3; % Stopband frequency
ciccomp = dsp.CICCompensationDecimator(cicdecim, ...
    'DecimationFactor', 2, ...
    'PassbandFrequency', fPass, ...
    'StopbandFrequency', fStop, ...
    'SampleRate', fs);

filtchain = dsp.FilterCascade(cicdecim, ciccomp);

order(filtchain)
ans = 648

Output Arguments

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Filter order, returned as a scalar. The order depends on the filter structure and the reference double-precision floating-point coefficients.

Data Types: double

See Also

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Introduced in R2011a