coeffs

Coefficients of prototype lowpass filter

Syntax

c = coeffs(obj)

Description

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

Examples

Coefficients Of Channelizer

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)

Input Arguments

obj — Input filter System object™

dsp.Channelizer | dsp.ChannelSynthesizer

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

Example: channelizer = dsp.Channelizer;

Example: channelizer = dsp.ChannelSynthesizer

Output Arguments

c — Lowpass filter coefficients

structure

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

Version History

Introduced in R2016b