coeffs
Coefficients of prototype lowpass filter
Syntax
Description
returns the coefficients of the prototype lowpass filter in c
= coeffs(obj
)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 fvtool
.
fvtool(c.Numerator,'impulse');
Input Arguments
obj
— Input filter System object™
dsp.Channelizer
| dsp.ChannelSynthesizer
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
See Also
Functions
polyphase
|tf
|fvtool
|freqz
|bandedgeFrequencies
|centerFrequencies
|getFilters
Objects
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