<!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: gri_mmse_fir_interpolator_cc Class Reference</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="navtree.js"></script> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript"> $(document).ready(initResizable); </script> <link href="doxygen.css" rel="stylesheet" type="text/css"/> </head> <body> <!-- Generated by Doxygen 1.7.3 --> <div id="top"> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td style="padding-left: 0.5em;"> <div id="projectname">GNU Radio 3.2.2 C++ API</div> </td> </tr> </tbody> </table> </div> </div> <div id="side-nav" class="ui-resizable side-nav-resizable"> <div id="nav-tree"> <div id="nav-tree-contents"> </div> </div> <div id="splitbar" style="-moz-user-select:none;" class="ui-resizable-handle"> </div> </div> <script type="text/javascript"> initNavTree('classgri__mmse__fir__interpolator__cc.html',''); </script> <div id="doc-content"> <div class="header"> <div class="summary"> <a href="#pub-methods">Public Member Functions</a> | <a href="#pro-attribs">Protected Attributes</a> </div> <div class="headertitle"> <h1>gri_mmse_fir_interpolator_cc Class Reference</h1> </div> </div> <div class="contents"> <!-- doxytag: class="gri_mmse_fir_interpolator_cc" --> <p>Compute intermediate samples between signal samples x(k*Ts)This implements a Mininum Mean Squared Error interpolator with 8 taps. It is suitable for signals where the bandwidth of interest B = 1/(4*Ts) Where Ts is the time between samples. <a href="#_details">More...</a></p> <p><code>#include <<a class="el" href="gri__mmse__fir__interpolator__cc_8h_source.html">gri_mmse_fir_interpolator_cc.h</a>></code></p> <p><a href="classgri__mmse__fir__interpolator__cc-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"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgri__mmse__fir__interpolator__cc.html#ab40613fad362ff3891d8be5ed344a978">gri_mmse_fir_interpolator_cc</a> ()</td></tr> <tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgri__mmse__fir__interpolator__cc.html#a3ec67acb5153b1ab71306855bcb0ab55">~gri_mmse_fir_interpolator_cc</a> ()</td></tr> <tr><td class="memItemLeft" align="right" valign="top">unsigned </td><td class="memItemRight" valign="bottom"><a class="el" href="classgri__mmse__fir__interpolator__cc.html#aa297b945c52bc8176c731e58f7ee9aa6">ntaps</a> () const </td></tr> <tr><td class="memItemLeft" align="right" valign="top">unsigned </td><td class="memItemRight" valign="bottom"><a class="el" href="classgri__mmse__fir__interpolator__cc.html#a2d7ae1765a3919468ee4445328d33844">nsteps</a> () const </td></tr> <tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgri__mmse__fir__interpolator__cc.html#a1da35404c1cd133a4bbd7347c1e49441">interpolate</a> (const <a class="el" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> input[], float mu)</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">compute a single interpolated output value. <a href="#a1da35404c1cd133a4bbd7347c1e49441"></a><br/></td></tr> <tr><td colspan="2"><h2><a name="pro-attribs"></a> Protected Attributes</h2></td></tr> <tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classstd_1_1vector.html">std::vector</a>< <a class="el" href="classgr__fir__ccf.html">gr_fir_ccf</a> * > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgri__mmse__fir__interpolator__cc.html#a339ff39a576abda306191912ebe7a249">filters</a></td></tr> </table> <hr/><a name="_details"></a><h2>Detailed Description</h2> <div class="textblock"><p>Compute intermediate samples between signal samples x(k*Ts)</p> <p>This implements a Mininum Mean Squared Error interpolator with 8 taps. It is suitable for signals where the bandwidth of interest B = 1/(4*Ts) Where Ts is the time between samples. </p> <p>Although mu, the fractional delay, is specified as a float, it is actually quantized. 0.0 <= mu <= 1.0. That is, mu is quantized in the interpolate method to 32nd's of a sample. </p> </div><hr/><h2>Constructor & Destructor Documentation</h2> <a class="anchor" id="ab40613fad362ff3891d8be5ed344a978"></a><!-- doxytag: member="gri_mmse_fir_interpolator_cc::gri_mmse_fir_interpolator_cc" ref="ab40613fad362ff3891d8be5ed344a978" args="()" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">gri_mmse_fir_interpolator_cc::gri_mmse_fir_interpolator_cc </td> <td>(</td> <td class="paramname"></td><td>)</td> <td></td> </tr> </table> </div> <div class="memdoc"> </div> </div> <a class="anchor" id="a3ec67acb5153b1ab71306855bcb0ab55"></a><!-- doxytag: member="gri_mmse_fir_interpolator_cc::~gri_mmse_fir_interpolator_cc" ref="a3ec67acb5153b1ab71306855bcb0ab55" args="()" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">gri_mmse_fir_interpolator_cc::~gri_mmse_fir_interpolator_cc </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="a1da35404c1cd133a4bbd7347c1e49441"></a><!-- doxytag: member="gri_mmse_fir_interpolator_cc::interpolate" ref="a1da35404c1cd133a4bbd7347c1e49441" args="(const gr_complex input[], float mu)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> gri_mmse_fir_interpolator_cc::interpolate </td> <td>(</td> <td class="paramtype">const <a class="el" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> </td> <td class="paramname"><em>input</em>[], </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">float </td> <td class="paramname"><em>mu</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div> <div class="memdoc"> <p>compute a single interpolated output value. </p> <p><code>input</code> must have <a class="el" href="classgri__mmse__fir__interpolator__cc.html#aa297b945c52bc8176c731e58f7ee9aa6">ntaps()</a> valid entries and be 8-byte aligned. input[0] .. input[<a class="el" href="classgri__mmse__fir__interpolator__cc.html#aa297b945c52bc8176c731e58f7ee9aa6">ntaps()</a> - 1] are referenced to compute the output value. </p> <dl><dt><b>Exceptions:</b></dt><dd> <table class="exception"> <tr><td class="paramname">std::invalid_argument</td><td>if input is not 8-byte aligned.</td></tr> </table> </dd> </dl> <p><code>mu</code> must be in the range [0, 1] and specifies the fractional delay.</p> <dl class="return"><dt><b>Returns:</b></dt><dd>the interpolated input value. </dd></dl> </div> </div> <a class="anchor" id="a2d7ae1765a3919468ee4445328d33844"></a><!-- doxytag: member="gri_mmse_fir_interpolator_cc::nsteps" ref="a2d7ae1765a3919468ee4445328d33844" args="() const " --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">unsigned gri_mmse_fir_interpolator_cc::nsteps </td> <td>(</td> <td class="paramname"></td><td>)</td> <td> const</td> </tr> </table> </div> <div class="memdoc"> </div> </div> <a class="anchor" id="aa297b945c52bc8176c731e58f7ee9aa6"></a><!-- doxytag: member="gri_mmse_fir_interpolator_cc::ntaps" ref="aa297b945c52bc8176c731e58f7ee9aa6" args="() const " --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">unsigned gri_mmse_fir_interpolator_cc::ntaps </td> <td>(</td> <td class="paramname"></td><td>)</td> <td> const</td> </tr> </table> </div> <div class="memdoc"> </div> </div> <hr/><h2>Member Data Documentation</h2> <a class="anchor" id="a339ff39a576abda306191912ebe7a249"></a><!-- doxytag: member="gri_mmse_fir_interpolator_cc::filters" ref="a339ff39a576abda306191912ebe7a249" args="" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="classstd_1_1vector.html">std::vector</a><<a class="el" href="classgr__fir__ccf.html">gr_fir_ccf</a> *> <a class="el" href="classgri__mmse__fir__interpolator__cc.html#a339ff39a576abda306191912ebe7a249">gri_mmse_fir_interpolator_cc::filters</a><code> [protected]</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="gri__mmse__fir__interpolator__cc_8h_source.html">gri_mmse_fir_interpolator_cc.h</a></li> </ul> </div> </div> <div id="nav-path" class="navpath"> <ul> <li class="navelem"><a class="el" href="classgri__mmse__fir__interpolator__cc.html">gri_mmse_fir_interpolator_cc</a> </li> <li class="footer">Generated on Thu Feb 17 2011 for GNU Radio 3.2.2 C++ API by  <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.3 </li> </ul> </div> </body> </html>