coeffs

Coefficients of prototype lowpass filter

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Syntax

c = coeffs(obj)

Description

c = coeffs(obj) returns the coefficients of the prototype lowpass filter in dsp.Channelizer and dsp.ChannelSynthesizer System objects.

example

Examples

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Open Live Script

Determine the coefficients of the prototype lowpass filter in the dsp.Channelizer object using the coeffs function.

The coeffs function returns a structure, c. The structure field Numerator contains the coefficients as a row vector. The number of elements in the row vector, given by c.Numerator, equals the number of frequency bands times the number of coefficients per band. These values are given by the NumFrequencyBands and NumTapsPerBand properties of the dsp.Channelizer object.

channelizer = dsp.Channelizer;
c = coeffs(channelizer);

Visualize the impulse response of the filter using impz.

impz(c.Numerator)

Figure contains an axes object. The axes object with title Impulse Response, xlabel n (samples), ylabel Amplitude contains an object of type stem.

Input Arguments

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Input filter, specified as either a dsp.Channelizer or a dsp.ChannelSynthesizer System object.

Example: channelizer = dsp.Channelizer;

Example: channelizer = dsp.ChannelSynthesizer

Output Arguments

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Lowpass filter coefficients, returned as a structure. The structure field Numerator contains the coefficients as a row vector.

Version History

Introduced in R2016b

See Also

Functions

Objects