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  <compounddef id="classgr_1_1analog_1_1cpm" kind="class" language="C++" prot="public">
    <compoundname>gr::analog::cpm</compoundname>
    <includes refid="cpm_8h" local="no">gnuradio/analog/cpm.h</includes>
    <sectiondef kind="public-type">
      <memberdef kind="enum" id="classgr_1_1analog_1_1cpm_1af223e9af9b0ec5566152a6ae85024a38" prot="public" static="no" strong="no">
        <type></type>
        <name>cpm_type</name>
        <qualifiedname>gr::analog::cpm::cpm_type</qualifiedname>
        <enumvalue id="classgr_1_1analog_1_1cpm_1af223e9af9b0ec5566152a6ae85024a38ac5ca61746b33c3e27f7e04e5e7b24df9" prot="public">
          <name>LRC</name>
          <briefdescription>
          </briefdescription>
          <detaileddescription>
          </detaileddescription>
        </enumvalue>
        <enumvalue id="classgr_1_1analog_1_1cpm_1af223e9af9b0ec5566152a6ae85024a38ad0e09af8123958da4797f0488612a6b2" prot="public">
          <name>LSRC</name>
          <briefdescription>
          </briefdescription>
          <detaileddescription>
          </detaileddescription>
        </enumvalue>
        <enumvalue id="classgr_1_1analog_1_1cpm_1af223e9af9b0ec5566152a6ae85024a38a1e24cfa68934ab47d120961480539410" prot="public">
          <name>LREC</name>
          <briefdescription>
          </briefdescription>
          <detaileddescription>
          </detaileddescription>
        </enumvalue>
        <enumvalue id="classgr_1_1analog_1_1cpm_1af223e9af9b0ec5566152a6ae85024a38a02321658c7bc8bdba2a818c7818b49ef" prot="public">
          <name>TFM</name>
          <briefdescription>
          </briefdescription>
          <detaileddescription>
          </detaileddescription>
        </enumvalue>
        <enumvalue id="classgr_1_1analog_1_1cpm_1af223e9af9b0ec5566152a6ae85024a38afc44a3e25514e98db75f72cec5dc3aee" prot="public">
          <name>GAUSSIAN</name>
          <briefdescription>
          </briefdescription>
          <detaileddescription>
          </detaileddescription>
        </enumvalue>
        <enumvalue id="classgr_1_1analog_1_1cpm_1af223e9af9b0ec5566152a6ae85024a38a9559efccf59d1ba077034bddc4f362e8" prot="public">
          <name>GENERIC</name>
          <initializer>= 999</initializer>
          <briefdescription>
          </briefdescription>
          <detaileddescription>
          </detaileddescription>
        </enumvalue>
        <briefdescription>
        </briefdescription>
        <detaileddescription>
        </detaileddescription>
        <inbodydescription>
        </inbodydescription>
        <location file="gr-analog/include/gnuradio/analog/cpm.h" line="25" column="5" bodyfile="gr-analog/include/gnuradio/analog/cpm.h" bodystart="25" bodyend="25"/>
      </memberdef>
    </sectiondef>
    <sectiondef kind="public-static-func">
      <memberdef kind="function" id="classgr_1_1analog_1_1cpm_1ac2b8d7ea0b09dd99ba988f98e5f0504c" prot="public" static="yes" const="no" explicit="no" inline="no" virt="non-virtual">
        <type>std::vector&lt; float &gt;</type>
        <definition>static std::vector&lt; float &gt; gr::analog::cpm::phase_response</definition>
        <argsstring>(cpm_type type, unsigned samples_per_sym, unsigned L, double beta=0.3)</argsstring>
        <name>phase_response</name>
        <qualifiedname>gr::analog::cpm::phase_response</qualifiedname>
        <param>
          <type><ref refid="classgr_1_1analog_1_1cpm_1af223e9af9b0ec5566152a6ae85024a38" kindref="member">cpm_type</ref></type>
          <declname>type</declname>
        </param>
        <param>
          <type>unsigned</type>
          <declname>samples_per_sym</declname>
        </param>
        <param>
          <type>unsigned</type>
          <declname>L</declname>
        </param>
        <param>
          <type>double</type>
          <declname>beta</declname>
          <defval>0.3</defval>
        </param>
        <briefdescription>
<para>Return the taps for an interpolating FIR filter (<ref refid="namespacegr_1_1filter_1a54f6e7ea6b305afb31c55622fe1389c9" kindref="member">gr::filter::interp_fir_filter_fff</ref>). </para>
        </briefdescription>
        <detaileddescription>
<para>These taps represent the phase response <formula id="0">$g(k)$</formula> for use in a CPM modulator, see also gr_cpmmod_bc.</para>
<para><parameterlist kind="param"><parameteritem>
<parameternamelist>
<parametername>type</parametername>
</parameternamelist>
<parameterdescription>
<para>The CPM type (Rectangular, Raised Cosine, Spectral Raised Cosine, Tamed FM or Gaussian). </para>
</parameterdescription>
</parameteritem>
<parameteritem>
<parameternamelist>
<parametername>samples_per_sym</parametername>
</parameternamelist>
<parameterdescription>
<para>Samples per symbol. </para>
</parameterdescription>
</parameteritem>
<parameteritem>
<parameternamelist>
<parametername>L</parametername>
</parameternamelist>
<parameterdescription>
<para>The length of the phase response in symbols. </para>
</parameterdescription>
</parameteritem>
<parameteritem>
<parameternamelist>
<parametername>beta</parametername>
</parameternamelist>
<parameterdescription>
<para>For Spectral Raised Cosine, this is the rolloff factor. For Gaussian phase responses, this the 3dB-time-bandwidth product. For all other cases, it is ignored.</para>
</parameterdescription>
</parameteritem>
</parameterlist>
Output: returns a vector of length <emphasis>K</emphasis> = <computeroutput>samples_per_sym</computeroutput> x <computeroutput>L</computeroutput>. This can be used directly in an interpolating FIR filter such as gr_interp_fir_filter_fff with interpolation factor <computeroutput>samples_per_sym</computeroutput>.</para>
<para>All phase responses are normalised s.t.  <formula id="1">$ \sum_{k=0}^{K-1}
g(k) = 1$</formula>; this will cause a maximum phase change of  <formula id="2">$ h
\cdot \pi$</formula> between two symbols, where <emphasis>h</emphasis> is the modulation index.</para>
<para>The following phase responses can be generated:<itemizedlist>
<listitem><para>LREC: Rectangular phase response.</para>
</listitem><listitem><para>LRC: Raised cosine phase response, looks like 1 - cos(x).</para>
</listitem><listitem><para>LSRC: Spectral raised cosine. This requires a rolloff factor beta. The phase response is the Fourier transform of raised cosine function.</para>
</listitem><listitem><para>TFM: Tamed frequency modulation. This scheme minimizes phase change for rapidly varying input symbols.</para>
</listitem><listitem><para>GAUSSIAN: A Gaussian phase response. For a modulation index h = 1/2, this results in GMSK.</para>
</listitem></itemizedlist>
</para>
<para>A short description of all these phase responses can be found in [1].</para>
<para>[1]: Anderson, Aulin and Sundberg; Digital Phase Modulation </para>
        </detaileddescription>
        <inbodydescription>
        </inbodydescription>
        <location file="gr-analog/include/gnuradio/analog/cpm.h" line="69" column="24"/>
      </memberdef>
    </sectiondef>
    <briefdescription>
<para>Return the taps for an interpolating FIR filter (<ref refid="namespacegr_1_1filter_1a54f6e7ea6b305afb31c55622fe1389c9" kindref="member">gr::filter::interp_fir_filter_fff</ref>). </para>
    </briefdescription>
    <detaileddescription>
    </detaileddescription>
    <location file="gr-analog/include/gnuradio/analog/cpm.h" line="22" column="1" bodyfile="gr-analog/include/gnuradio/analog/cpm.h" bodystart="23" bodyend="73"/>
    <listofallmembers>
      <member refid="classgr_1_1analog_1_1cpm_1af223e9af9b0ec5566152a6ae85024a38" prot="public" virt="non-virtual"><scope>gr::analog::cpm</scope><name>cpm_type</name></member>
      <member refid="classgr_1_1analog_1_1cpm_1af223e9af9b0ec5566152a6ae85024a38afc44a3e25514e98db75f72cec5dc3aee" prot="public" virt="non-virtual"><scope>gr::analog::cpm</scope><name>GAUSSIAN</name></member>
      <member refid="classgr_1_1analog_1_1cpm_1af223e9af9b0ec5566152a6ae85024a38a9559efccf59d1ba077034bddc4f362e8" prot="public" virt="non-virtual"><scope>gr::analog::cpm</scope><name>GENERIC</name></member>
      <member refid="classgr_1_1analog_1_1cpm_1af223e9af9b0ec5566152a6ae85024a38ac5ca61746b33c3e27f7e04e5e7b24df9" prot="public" virt="non-virtual"><scope>gr::analog::cpm</scope><name>LRC</name></member>
      <member refid="classgr_1_1analog_1_1cpm_1af223e9af9b0ec5566152a6ae85024a38a1e24cfa68934ab47d120961480539410" prot="public" virt="non-virtual"><scope>gr::analog::cpm</scope><name>LREC</name></member>
      <member refid="classgr_1_1analog_1_1cpm_1af223e9af9b0ec5566152a6ae85024a38ad0e09af8123958da4797f0488612a6b2" prot="public" virt="non-virtual"><scope>gr::analog::cpm</scope><name>LSRC</name></member>
      <member refid="classgr_1_1analog_1_1cpm_1ac2b8d7ea0b09dd99ba988f98e5f0504c" prot="public" virt="non-virtual"><scope>gr::analog::cpm</scope><name>phase_response</name></member>
      <member refid="classgr_1_1analog_1_1cpm_1af223e9af9b0ec5566152a6ae85024a38a02321658c7bc8bdba2a818c7818b49ef" prot="public" virt="non-virtual"><scope>gr::analog::cpm</scope><name>TFM</name></member>
    </listofallmembers>
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