<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <title>GNU Radio 3.2.2 C++ API: gr_decode_ccsds_27_fb Class Reference</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <link href="doxygen.css" rel="stylesheet" type="text/css"/> </head> <body> <!-- Generated by Doxygen 1.6.2 --> <div class="contents"> <h1>gr_decode_ccsds_27_fb Class Reference</h1><!-- doxytag: class="gr_decode_ccsds_27_fb" --><!-- doxytag: inherits="gr_sync_decimator" --> <p>A rate 1/2, k=7 convolutional decoder for the CCSDS standardThis block performs soft-decision convolutional decoding using the Viterbi algorithm. <a href="#_details">More...</a></p> <p><code>#include <<a class="el" href="gr__decode__ccsds__27__fb_8h_source.html">gr_decode_ccsds_27_fb.h</a>></code></p> <div class="dynheader"> Inheritance diagram for gr_decode_ccsds_27_fb:</div> <div class="dynsection"> <div class="center"><img src="classgr__decode__ccsds__27__fb__inherit__graph.png" border="0" usemap="#gr__decode__ccsds__27__fb_inherit__map" alt="Inheritance graph"/></div> <map name="gr__decode__ccsds__27__fb_inherit__map" id="gr__decode__ccsds__27__fb_inherit__map"> <area shape="rect" id="node2" href="classgr__sync__decimator.html" title="synchronous N:1 input to output with historyOverride work to provide the signal processing..." alt="" coords="21,237,152,267"/><area shape="rect" id="node4" href="classgr__sync__block.html" title="synchronous 1:1 input to output with historyOverride work to provide the signal processing..." alt="" coords="33,160,140,189"/><area shape="rect" id="node6" href="classgr__block.html" title="The abstract base class for all 'terminal' processing blocks.A signal processing..." alt="" coords="52,83,121,112"/><area shape="rect" id="node8" href="classgr__basic__block.html" title="The abstract base class for all signal processing blocks.Basic blocks are the bare..." alt="" coords="32,5,141,35"/></map> <center><span class="legend">[<a target="top" href="graph_legend.html">legend</a>]</span></center></div> <p><a href="classgr__decode__ccsds__27__fb-members.html">List of all members.</a></p> <table border="0" cellpadding="0" cellspacing="0"> <tr><td colspan="2"><h2>Public Member Functions</h2></td></tr> <tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__decode__ccsds__27__fb.html#ae325913365d75520e8b9ccddb1832522">~gr_decode_ccsds_27_fb</a> ()</td></tr> <tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__decode__ccsds__27__fb.html#a913481b6b9bfbf8a97ba5f02deddd31d">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="#a913481b6b9bfbf8a97ba5f02deddd31d"></a><br/></td></tr> <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_decode_ccsds_27_fb_sptr</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__decode__ccsds__27__fb.html#a9aa133569967608121cc77aa5f0bbcbd">gr_make_decode_ccsds_27_fb</a> ()</td></tr> </table> <hr/><a name="_details"></a><h2>Detailed Description</h2> <p>A rate 1/2, k=7 convolutional decoder for the CCSDS standard</p> <p>This block performs soft-decision convolutional decoding using the Viterbi algorithm. </p> <p>The input is a stream of (possibly noise corrupted) floating point values nominally spanning [-1.0, 1.0], representing the encoded channel symbols 0 (-1.0) and 1 (1.0), with erased symbols at 0.0.</p> <p>The output is MSB first packed bytes of decoded values.</p> <p>As a rate 1/2 code, there will be one output byte for every 16 input symbols.</p> <p>This block is designed for continuous data streaming, not packetized data. The first 32 bits out will be zeroes, with the output delayed four bytes from the corresponding inputs. </p> <hr/><h2>Constructor & Destructor Documentation</h2> <a class="anchor" id="ae325913365d75520e8b9ccddb1832522"></a><!-- doxytag: member="gr_decode_ccsds_27_fb::~gr_decode_ccsds_27_fb" ref="ae325913365d75520e8b9ccddb1832522" args="()" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">gr_decode_ccsds_27_fb::~gr_decode_ccsds_27_fb </td> <td>(</td> <td class="paramname"></td> <td> ) </td> <td></td> </tr> </table> </div> <div class="memdoc"> </div> </div> <hr/><h2>Member Function Documentation</h2> <a class="anchor" id="a913481b6b9bfbf8a97ba5f02deddd31d"></a><!-- doxytag: member="gr_decode_ccsds_27_fb::work" ref="a913481b6b9bfbf8a97ba5f02deddd31d" args="(int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">int gr_decode_ccsds_27_fb::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><td> </td> </tr> <tr> <td></td> <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="a9aa133569967608121cc77aa5f0bbcbd"></a><!-- doxytag: member="gr_decode_ccsds_27_fb::gr_make_decode_ccsds_27_fb" ref="a9aa133569967608121cc77aa5f0bbcbd" args="()" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="classboost_1_1shared__ptr.html">gr_decode_ccsds_27_fb_sptr</a> gr_make_decode_ccsds_27_fb </td> <td>(</td> <td class="paramname"></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__decode__ccsds__27__fb_8h_source.html">gr_decode_ccsds_27_fb.h</a></li> </ul> </div> <hr size="1"/><address style="text-align: right;"><small>Generated by <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address> </body> </html>