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<?xml version="1.0" encoding="UTF-8"?>
<!--
*
* This help file was generated from cl2bp.sci using help_from_sci().
*
-->
<refentry version="5.0-subset Scilab" xml:id="cl2bp" 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>cl2bp</refname>
<refpurpose>Constrained L2 bandpass FIR filter design.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Calling Sequence</title>
<synopsis>
h = cl2bp (m, w1, w2, up, lo, gridsize)
h = cl2bp (m, w1, w2, up, lo)
</synopsis>
</refsynopsisdiv>
<refsection>
<title>Parameters</title>
<variablelist>
<varlistentry><term>m:</term>
<listitem><para> degree of cosine polynomial, i.e. the number of output coefficients will be m*2+1</para></listitem></varlistentry>
<varlistentry><term>w1 and w2:</term>
<listitem><para> bandpass filter cutoffs in the range 0 <= w1 < w2 <= pi, where pi is the Nyquist frequency</para></listitem></varlistentry>
<varlistentry><term>up:</term>
<listitem><para> vector of 3 upper bounds for [stopband1, passband, stopband2]</para></listitem></varlistentry>
<varlistentry><term>lo:</term>
<listitem><para> vector of 3 lower bounds for [stopband1, passband, stopband2]</para></listitem></varlistentry>
<varlistentry><term>gridsize:</term>
<listitem><para> search grid size; larger values may improve accuracy, but greatly increase calculation time.</para></listitem></varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Description</title>
<para>
This is an Octave function.
Constrained L2 bandpass FIR filter design. Compared to remez, it offers implicit specification of transition bands, a higher likelihood of convergence, and an error criterion combining features of both L2 and Chebyshev approaches.
</para>
</refsection>
<refsection>
<title>Examples</title>
<programlisting role="example"><![CDATA[
h = cl2bp(5, 0.3*pi, 0.6*pi, [0.02, 1.02, 0.02], [-0.02, 0.98, -0.02], 2^11)
h =
0.038311
0.082289
-0.086163
-0.226006
0.047851
0.307434
0.047851
-0.226006
-0.086163
0.082289
0.038311
]]></programlisting>
</refsection>
</refentry>
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