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<a href="#pub-methods">Public Member Functions</a> |
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<h1>gr_peak_detector_sb Class Reference<div class="ingroups"><a class="el" href="group__level__blk.html">Signal Level Control (AGC)</a></div></h1> </div>
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<!-- doxytag: class="gr_peak_detector_sb" --><!-- doxytag: inherits="gr_sync_block" -->
<p>Detect the peak of a signalIf a peak is detected, this block outputs a 1, or it outputs 0's.
<a href="#_details">More...</a></p>
<p><code>#include <<a class="el" href="gr__peak__detector__sb_8h_source.html">gr_peak_detector_sb.h</a>></code></p>
<div class="dynheader">
Inheritance diagram for gr_peak_detector_sb:</div>
<div class="dyncontent">
<div class="center"><img src="classgr__peak__detector__sb__inherit__graph.png" border="0" usemap="#gr__peak__detector__sb_inherit__map" alt="Inheritance graph"/></div>
<map name="gr__peak__detector__sb_inherit__map" id="gr__peak__detector__sb_inherit__map">
<area shape="rect" id="node2" href="classgr__sync__block.html" title="synchronous 1:1 input to output with historyOverride work to provide the signal processing implementa..." alt="" coords="23,160,129,189"/><area shape="rect" id="node4" href="classgr__block.html" title="The abstract base class for all 'terminal' processing blocks.A signal processing flow is cons..." alt="" coords="41,83,111,112"/><area shape="rect" id="node6" href="classgr__basic__block.html" title="The abstract base class for all signal processing blocks.Basic blocks are the bare abstraction of an ..." alt="" coords="21,5,131,35"/></map>
<center><span class="legend">[<a target="top" href="graph_legend.html">legend</a>]</span></center></div>
<p><a href="classgr__peak__detector__sb-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__peak__detector__sb.html#af87da42301b3a32ad23d924c0953a3e9">set_threshold_factor_rise</a> (float thr)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the threshold factor value for the rise time. <a href="#af87da42301b3a32ad23d924c0953a3e9"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__peak__detector__sb.html#abc65412a7a48fb8aeba4e0965cb36d1a">set_threshold_factor_fall</a> (float thr)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the threshold factor value for the fall time. <a href="#abc65412a7a48fb8aeba4e0965cb36d1a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__peak__detector__sb.html#ae0b4ede9e51baa48c44d634abda2c490">set_look_ahead</a> (int look)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the look-ahead factor. <a href="#ae0b4ede9e51baa48c44d634abda2c490"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__peak__detector__sb.html#a4a53ed060f60639079af13a2756db1a2">set_alpha</a> (int alpha)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the running average alpha. <a href="#a4a53ed060f60639079af13a2756db1a2"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">float </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__peak__detector__sb.html#a26b0eb094a52ea634645ba5289a9540a">threshold_factor_rise</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the threshold factor value for the rise time. <a href="#a26b0eb094a52ea634645ba5289a9540a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">float </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__peak__detector__sb.html#a913a9d80832eb0a7b0aa12abb82fad13">threshold_factor_fall</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the threshold factor value for the fall time. <a href="#a913a9d80832eb0a7b0aa12abb82fad13"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__peak__detector__sb.html#accd7ca68b60aad589da16a41aa42a4a4">look_ahead</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the look-ahead factor value. <a href="#accd7ca68b60aad589da16a41aa42a4a4"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">float </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__peak__detector__sb.html#a294c75f4c9b97da544cd33c18c8176e3">alpha</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the alpha value of the running average. <a href="#a294c75f4c9b97da544cd33c18c8176e3"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__peak__detector__sb.html#af2a6140a699f936576fe2c80ccf60e57">work</a> (int noutput_items, <a class="el" href="classstd_1_1vector.html">gr_vector_const_void_star</a> &input_items, <a class="el" href="classstd_1_1vector.html">gr_vector_void_star</a> &output_items)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">just like <a class="el" href="classgr__block.html#a137b93d87dc83bbdb6369d33f4ea8197" title="compute output items from input items">gr_block::general_work</a>, only this arranges to call consume_each for you <a href="#af2a6140a699f936576fe2c80ccf60e57"></a><br/></td></tr>
<tr><td colspan="2"><h2><a name="friends"></a>
Friends</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classboost_1_1shared__ptr.html">gr_peak_detector_sb_sptr</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__peak__detector__sb.html#ad88b0368ac6782b75ea86ac0240cbb5e">gr_make_peak_detector_sb</a> (float threshold_factor_rise, float threshold_factor_fall, int look_ahead, float alpha)</td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>Detect the peak of a signal</p>
<p>If a peak is detected, this block outputs a 1, or it outputs 0's. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">threshold_factor_rise</td><td>The threshold factor determins when a peak has started. An average of the signal is calculated and when the value of the signal goes over threshold_factor_rise*average, we start looking for a peak. </td></tr>
<tr><td class="paramname">threshold_factor_fall</td><td>The threshold factor determins when a peak has ended. An average of the signal is calculated and when the value of the signal goes bellow threshold_factor_fall*average, we stop looking for a peak. </td></tr>
<tr><td class="paramname">look_ahead</td><td>The look-ahead value is used when the threshold is found to look if there another peak within this step range. If there is a larger value, we set that as the peak and look ahead again. This is continued until the highest point is found with This look-ahead range. </td></tr>
<tr><td class="paramname">alpha</td><td>The gain value of a moving average filter </td></tr>
</table>
</dd>
</dl>
</div><hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a294c75f4c9b97da544cd33c18c8176e3"></a><!-- doxytag: member="gr_peak_detector_sb::alpha" ref="a294c75f4c9b97da544cd33c18c8176e3" args="()" -->
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<td class="memname">float gr_peak_detector_sb::alpha </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [inline]</code></td>
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<div class="memdoc">
<p>Get the alpha value of the running average. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd>alpha </dd></dl>
<p>Referenced by <a class="el" href="classgr__peak__detector__sb.html#a4a53ed060f60639079af13a2756db1a2">set_alpha()</a>.</p>
</div>
</div>
<a class="anchor" id="accd7ca68b60aad589da16a41aa42a4a4"></a><!-- doxytag: member="gr_peak_detector_sb::look_ahead" ref="accd7ca68b60aad589da16a41aa42a4a4" args="()" -->
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<td class="memname">int gr_peak_detector_sb::look_ahead </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [inline]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Get the look-ahead factor value. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd>look-ahead factor </dd></dl>
</div>
</div>
<a class="anchor" id="a4a53ed060f60639079af13a2756db1a2"></a><!-- doxytag: member="gr_peak_detector_sb::set_alpha" ref="a4a53ed060f60639079af13a2756db1a2" args="(int alpha)" -->
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<td class="memname">void gr_peak_detector_sb::set_alpha </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>alpha</em></td><td>)</td>
<td><code> [inline]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Set the running average alpha. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">alpha</td><td>new alpha for running average </td></tr>
</table>
</dd>
</dl>
<p>References <a class="el" href="classgr__peak__detector__sb.html#a294c75f4c9b97da544cd33c18c8176e3">alpha()</a>.</p>
</div>
</div>
<a class="anchor" id="ae0b4ede9e51baa48c44d634abda2c490"></a><!-- doxytag: member="gr_peak_detector_sb::set_look_ahead" ref="ae0b4ede9e51baa48c44d634abda2c490" args="(int look)" -->
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<td class="memname">void gr_peak_detector_sb::set_look_ahead </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>look</em></td><td>)</td>
<td><code> [inline]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Set the look-ahead factor. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">look</td><td>new look-ahead factor </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="abc65412a7a48fb8aeba4e0965cb36d1a"></a><!-- doxytag: member="gr_peak_detector_sb::set_threshold_factor_fall" ref="abc65412a7a48fb8aeba4e0965cb36d1a" args="(float thr)" -->
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<td class="memname">void gr_peak_detector_sb::set_threshold_factor_fall </td>
<td>(</td>
<td class="paramtype">float </td>
<td class="paramname"><em>thr</em></td><td>)</td>
<td><code> [inline]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Set the threshold factor value for the fall time. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">thr</td><td>new threshold factor </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="af87da42301b3a32ad23d924c0953a3e9"></a><!-- doxytag: member="gr_peak_detector_sb::set_threshold_factor_rise" ref="af87da42301b3a32ad23d924c0953a3e9" args="(float thr)" -->
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<td class="memname">void gr_peak_detector_sb::set_threshold_factor_rise </td>
<td>(</td>
<td class="paramtype">float </td>
<td class="paramname"><em>thr</em></td><td>)</td>
<td><code> [inline]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Set the threshold factor value for the rise time. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">thr</td><td>new threshold factor </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="a913a9d80832eb0a7b0aa12abb82fad13"></a><!-- doxytag: member="gr_peak_detector_sb::threshold_factor_fall" ref="a913a9d80832eb0a7b0aa12abb82fad13" args="()" -->
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<td class="memname">float gr_peak_detector_sb::threshold_factor_fall </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [inline]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Get the threshold factor value for the fall time. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd>threshold factor </dd></dl>
</div>
</div>
<a class="anchor" id="a26b0eb094a52ea634645ba5289a9540a"></a><!-- doxytag: member="gr_peak_detector_sb::threshold_factor_rise" ref="a26b0eb094a52ea634645ba5289a9540a" args="()" -->
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<td class="memname">float gr_peak_detector_sb::threshold_factor_rise </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [inline]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Get the threshold factor value for the rise time. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd>threshold factor </dd></dl>
</div>
</div>
<a class="anchor" id="af2a6140a699f936576fe2c80ccf60e57"></a><!-- doxytag: member="gr_peak_detector_sb::work" ref="af2a6140a699f936576fe2c80ccf60e57" args="(int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)" -->
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<td class="memname">int gr_peak_detector_sb::work </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>noutput_items</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classstd_1_1vector.html">gr_vector_const_void_star</a> & </td>
<td class="paramname"><em>input_items</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classstd_1_1vector.html">gr_vector_void_star</a> & </td>
<td class="paramname"><em>output_items</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td><code> [virtual]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>just like <a class="el" href="classgr__block.html#a137b93d87dc83bbdb6369d33f4ea8197" title="compute output items from input items">gr_block::general_work</a>, only this arranges to call consume_each for you </p>
<p>The user must override work to define the signal processing code </p>
<p>Implements <a class="el" href="classgr__sync__block.html#a0c523f4285a6eb690f677ee6295ab117">gr_sync_block</a>.</p>
</div>
</div>
<hr/><h2>Friends And Related Function Documentation</h2>
<a class="anchor" id="ad88b0368ac6782b75ea86ac0240cbb5e"></a><!-- doxytag: member="gr_peak_detector_sb::gr_make_peak_detector_sb" ref="ad88b0368ac6782b75ea86ac0240cbb5e" args="(float threshold_factor_rise, float threshold_factor_fall, int look_ahead, float alpha)" -->
<div class="memitem">
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<td class="memname"><a class="el" href="classboost_1_1shared__ptr.html">gr_peak_detector_sb_sptr</a> gr_make_peak_detector_sb </td>
<td>(</td>
<td class="paramtype">float </td>
<td class="paramname"><em>threshold_factor_rise</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float </td>
<td class="paramname"><em>threshold_factor_fall</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>look_ahead</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float </td>
<td class="paramname"><em>alpha</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td><code> [friend]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="gr__peak__detector__sb_8h_source.html">gr_peak_detector_sb.h</a></li>
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