coeffs - Coefficients for filters

Syntax

s = coeffs(ha)
s = coeffs(hd)
s = coeffs(hm)

Description

The next sections describe common coeffs operation with adaptive, discrete-time, and multirate filters.

Adaptive Filters

s = coeffs(ha) returns a structure s containing the coefficients of adaptive filter ha. These are the instantaneous filter coefficients available at the time you use the function.

Discrete-Time Filters

s = coeffs(hd) returns a structure s that contains the coefficients of discrete-time filter hd.

Multirate Filters

s = coeffs(hm) returns s, a structure containing the coefficients of discrete-time filter hm. CIC-based filters do not have coefficients and this function does not work with constructors like mfilt.cicdecim.

Examples

coefficients works the same way for all filters. This example uses a multirate filter hm to demonstrate the function.

hm=mfilt.firdecim(3)
 
hm =
 
     FilterStructure: 'Direct-Form FIR Polyphase Decimator'
          Arithmetic: 'double'                             
           Numerator: [1x72 double]                        
    DecimationFactor: 3                                    
    PersistentMemory: false   

s=coeffs(hm)

s = 

    Numerator: [1x72 double]

The filter coefficients may be extracted by typing s.Numerator at the command prompt.

See Also

adaptfilt, freqz, grpdelay, impz, info, phasez, stepz, zerophase, zplane

cl2tf

coeread

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