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<?xml version="1.0" encoding="UTF-8"?>
<!--
*
* This help file was generated from firpmord.sci using help_from_sci().
*
-->
<refentry version="5.0-subset Scilab" xml:id="firpmord" xml:lang="en"
xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns:ns3="http://www.w3.org/1999/xhtml"
xmlns:mml="http://www.w3.org/1998/Math/MathML"
xmlns:scilab="http://www.scilab.org"
xmlns:db="http://docbook.org/ns/docbook">
<refnamediv>
<refname>firpmord</refname>
<refpurpose>Parks-McClennan optimal FIR filter order estimation</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Calling Sequence</title>
<synopsis>
</synopsis>
</refsynopsisdiv>
<refsection>
<title>Parameters</title>
<variablelist>
<varlistentry><term>f:</term>
<listitem><para> double - positive - vector</para></listitem></varlistentry>
<varlistentry><term>a:</term>
<listitem><para> double - positive - vector</para></listitem></varlistentry>
<varlistentry><term>dev:</term>
<listitem><para> double - positive - vector</para></listitem></varlistentry>
<varlistentry><term>n:</term>
<listitem><para> int - scalar</para></listitem></varlistentry>
<varlistentry><term>fo:</term>
<listitem><para> double - positive - vector</para></listitem></varlistentry>
<varlistentry><term>ao:</term>
<listitem><para> double - positive - vector</para></listitem></varlistentry>
<varlistentry><term>w:</term>
<listitem><para> double - vector</para></listitem></varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Examples</title>
<programlisting role="example"><![CDATA[
[1] A low-pass filter
f = [1500 2000]; // frequency edges for bands
a = [1 0]; // desired amplitude for each band
dev = [0.01 0.1]; // Acceptable deviation for each band
fs = 8000; // Sampling frequency
[n,fo,ao,w] = firpmord(f,a,dev,fs);
[2] A bandstop filter
f = [1000 1800 2400 3000];
a = [1 0 0.5];
dev = [0.01 0.1 0.03];
fs = 8000;
[n,fo,ao,w] = firpmord(f,a,dev,fs);
References
[1] Rabiner, Lawrence R., and Bernard Gold. "Theory and application of
digital signal processing." Englewood Cliffs, NJ, Prentice-Hall, Inc.,
1975. 777 p. 156-7 (1975).
[2] Rabiner, Lawrence R., and Otto Herrmann. "The predictability of certain
optimum finite-impulse-response digital filters." Circuit Theory,
IEEE Transactions on 20.4 (1973): 401-408.
]]></programlisting>
</refsection>
<refsection>
<title>Authors</title>
<simplelist type="vert">
<member>Ayush Baid</member>
</simplelist>
</refsection>
<refsection>
<title>See also</title>
<simplelist type="inline">
</simplelist>
</refsection>
</refentry>
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