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<?xml version="1.0" encoding="UTF-8"?>
<!--
*
* This help file was generated from prony.sci using help_from_sci().
*
-->
<refentry version="5.0-subset Scilab" xml:id="prony" 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>prony</refname>
<refpurpose>Prony's method for time-domain design of IIR Filters</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Calling Sequence</title>
<synopsis>
[b,a] = prony(h,nb,na)
</synopsis>
</refsynopsisdiv>
<refsection>
<title>Description</title>
<para>
The system function has numerator order,nb and denominator order,na. The lengths of Num and Den are num_ord+1 and denom_ord+1. If the length of impulse_resp is less than the largest order (num_ord or denom_ord), impulse_resp is padded with zeros.
</para>
</refsection>
<refsection>
<title>Parameters</title>
<variablelist>
<varlistentry><term>b:</term>
<listitem><para> coefficients of the numerator of the TF</para></listitem></varlistentry>
</variablelist>
<variablelist>
<varlistentry><term>a:</term>
<listitem><para> coefficients of the denominator of the TF</para></listitem></varlistentry>
</variablelist>
<variablelist>
<varlistentry><term>h:</term>
<listitem><para>impulse response of the digital filter </para></listitem></varlistentry>
</variablelist>
<variablelist>
<varlistentry><term>nb:</term>
<listitem><para>number of zeros(order of numerator) </para></listitem></varlistentry>
</variablelist>
<variablelist>
<varlistentry><term>na:</term>
<listitem><para>number of poles(order of denominator) </para></listitem></varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Examples</title>
<programlisting role="example"><![CDATA[
V=filter([1,1],[1,1,2],[1 zeros(1,31)]);
[b,a]=prony(V,1,2)
//OUTPUT:a = 1. 1. 2.//denominator coefficients
//b = 1. 1. //numerator coefficients
]]></programlisting>
</refsection>
</refentry>
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