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<title>GNU Radio 3.3.0 C++ API: gr_pll_freqdet_cf Class Reference</title>
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<h1>gr_pll_freqdet_cf Class Reference<br/>
<small>
[<a class="el" href="group__sync__blk.html">Synchronization</a>]</small>
</h1><!-- doxytag: class="gr_pll_freqdet_cf" --><!-- doxytag: inherits="gr_sync_block" -->
<p>Implements a PLL which locks to the input frequency and outputs an estimate of that frequency. Useful for FM Demod.input: stream of complex; output: stream of floats.
<a href="#_details">More...</a></p>
<p><code>#include <<a class="el" href="gr__pll__freqdet__cf_8h_source.html">gr_pll_freqdet_cf.h</a>></code></p>
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Inheritance diagram for gr_pll_freqdet_cf:</div>
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<div class="center"><img src="classgr__pll__freqdet__cf__inherit__graph.png" border="0" usemap="#gr__pll__freqdet__cf_inherit__map" alt="Inheritance graph"/></div>
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<p><a href="classgr__pll__freqdet__cf-members.html">List of all members.</a></p>
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<tr><td colspan="2"><h2>Friends</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classboost_1_1shared__ptr.html">gr_pll_freqdet_cf_sptr</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__pll__freqdet__cf.html#a870a1a125da1ce2e016eb72458ac67c9">gr_make_pll_freqdet_cf</a> (float alpha, float beta, float max_freq, float min_freq)</td></tr>
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<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>Implements a PLL which locks to the input frequency and outputs an estimate of that frequency. Useful for FM Demod.</p>
<p>input: stream of complex; output: stream of floats. </p>
<p>This PLL locks onto a [possibly noisy] reference carrier on the input and outputs an estimate of that frequency in radians per sample. All settings max_freq and min_freq are in terms of radians per sample, NOT HERTZ. Alpha is the phase gain (first order, units of radians per radian) and beta is the frequency gain (second order, units of radians per sample per radian) </p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classgr__pll__refout__cc.html" title="Implements a PLL which locks to the input frequency and outputs a carrierinput: stream...">gr_pll_refout_cc</a>, <a class="el" href="classgr__pll__carriertracking__cc.html" title="Implements a PLL which locks to the input frequency and outputs the input signal...">gr_pll_carriertracking_cc</a> </dd></dl>
<hr/><h2>Friends And Related Function Documentation</h2>
<a class="anchor" id="a870a1a125da1ce2e016eb72458ac67c9"></a><!-- doxytag: member="gr_pll_freqdet_cf::gr_make_pll_freqdet_cf" ref="a870a1a125da1ce2e016eb72458ac67c9" args="(float alpha, float beta, float max_freq, float min_freq)" -->
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<td class="memname"><a class="el" href="classboost_1_1shared__ptr.html">gr_pll_freqdet_cf_sptr</a> gr_make_pll_freqdet_cf </td>
<td>(</td>
<td class="paramtype">float </td>
<td class="paramname"> <em>alpha</em>, </td>
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<td class="paramtype">float </td>
<td class="paramname"> <em>beta</em>, </td>
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<td class="paramtype">float </td>
<td class="paramname"> <em>max_freq</em>, </td>
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<td class="paramtype">float </td>
<td class="paramname"> <em>min_freq</em></td><td> </td>
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<td>)</td>
<td></td><td></td><td><code> [friend]</code></td>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="gr__pll__freqdet__cf_8h_source.html">gr_pll_freqdet_cf.h</a></li>
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