T. P. Traitement du Signal Maîtrise E.E.A. - LASC
T. P. Traitement du Signal Maîtrise E.E.A. - LASC
T. P. Traitement du Signal Maîtrise E.E.A. - LASC
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Accessing Filter Parameters<br />
the filter specifications are contained in the fdremez field, which is itself a data<br />
structure.<br />
The specifications include the parameter values from the Specifications<br />
region of the Filter Designer, such as band edges and filter order. For example,<br />
the filter above has the following specifications stored in<br />
filt1.specs.fdremez:<br />
filt1.specs.fdremez<br />
ans =<br />
setOrderFlag: 0<br />
type: 3<br />
f: [0 0.2000 0.3000 0.5000 0.6000 1]<br />
m: [6x1 double]<br />
Rp: 0.0100<br />
Rs: 75<br />
wt: [3.2371 1 3.2371]<br />
order: 78<br />
Because certain filter parameters are unique to a particular design, this<br />
structure has a different set of fields for each filter design.<br />
The table below describes the possible fields associated with the filter design<br />
specification field (the specs field) that can appear in the exported structure.<br />
Parameter<br />
Beta<br />
f<br />
Fpass<br />
Fstop<br />
Description<br />
Kaiser window β parameter.<br />
Contains a vector of band-edge frequencies, normalized so<br />
that 1 Hz corresponds to half the sample frequency.<br />
Passband cutoff frequencies. Scalar for lowpass and<br />
highpass designs, two-element vector for bandpass and<br />
bandstop designs.<br />
Stopband cutoff frequencies. Scalar for lowpass and<br />
highpass designs, two-element vector for bandpass and<br />
bandstop designs.<br />
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