<!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"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <title>Real FFT Tables</title> <title>CMSIS-DSP: Real FFT Tables</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <link href="cmsis.css" rel="stylesheet" type="text/css" /> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <script type="text/javascript" src="printComponentTabs.js"></script> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript" src="navtree.js"></script> <script type="text/javascript"> $(document).ready(initResizable); $(window).load(resizeHeight); </script> <link href="search/search.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="search/search.js"></script> <script type="text/javascript"> $(document).ready(function() { searchBox.OnSelectItem(0); }); </script> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 46px;"> <td id="projectlogo"><img alt="Logo" src="CMSIS_Logo_Final.png"/></td> <td style="padding-left: 0.5em;"> <div id="projectname">CMSIS-DSP  <span id="projectnumber">Version 1.5.1</span> </div> <div id="projectbrief">CMSIS DSP Software Library</div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <div id="CMSISnav" class="tabs1"> <ul class="tablist"> <script type="text/javascript"> <!-- writeComponentTabs.call(this); //--> </script> </ul> </div> <!-- Generated by Doxygen 1.8.6 --> <script type="text/javascript"> var searchBox = new SearchBox("searchBox", "search",false,'Search'); </script> <div id="navrow1" class="tabs"> <ul class="tablist"> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="pages.html"><span>Usage and Description</span></a></li> <li><a href="modules.html"><span>Reference</span></a></li> <li> <div id="MSearchBox" class="MSearchBoxInactive"> <span class="left"> <img id="MSearchSelect" src="search/mag_sel.png" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()" alt=""/> <input type="text" id="MSearchField" value="Search" accesskey="S" onfocus="searchBox.OnSearchFieldFocus(true)" onblur="searchBox.OnSearchFieldFocus(false)" onkeyup="searchBox.OnSearchFieldChange(event)"/> </span><span class="right"> <a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a> </span> </div> </li> </ul> </div> </div><!-- top --> <div id="side-nav" class="ui-resizable side-nav-resizable"> <div id="nav-tree"> <div id="nav-tree-contents"> <div id="nav-sync" class="sync"></div> </div> </div> <div id="splitbar" style="-moz-user-select:none;" class="ui-resizable-handle"> </div> </div> <script type="text/javascript"> $(document).ready(function(){initNavTree('group__RealFFT__Table.html','');}); </script> <div id="doc-content"> <!-- window showing the filter options --> <div id="MSearchSelectWindow" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()" onkeydown="return searchBox.OnSearchSelectKey(event)"> <a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Data Structures</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark"> </span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark"> </span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark"> </span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark"> </span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark"> </span>Macros</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(9)"><span class="SelectionMark"> </span>Groups</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(10)"><span class="SelectionMark"> </span>Pages</a></div> <!-- iframe showing the search results (closed by default) --> <div id="MSearchResultsWindow"> <iframe src="javascript:void(0)" frameborder="0" name="MSearchResults" id="MSearchResults"> </iframe> </div> <div class="header"> <div class="summary"> <a href="#var-members">Variables</a> </div> <div class="headertitle"> <div class="title">Real FFT Tables<div class="ingroups"><a class="el" href="group__RealFFT.html">Real FFT Functions</a></div></div> </div> </div><!--header--> <div class="contents"> <table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="var-members"></a> Variables</h2></td></tr> <tr class="memitem:ga8b1ad947c470596674fa3364e16045c6"><td class="memItemLeft" align="right" valign="top">static const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__RealFFT__Table.html#ga8b1ad947c470596674fa3364e16045c6">realCoefA</a> [8192]</td></tr> <tr class="separator:ga8b1ad947c470596674fa3364e16045c6"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:gac52f98b52a1f03bfac8b57a67ba07397"><td class="memItemLeft" align="right" valign="top">static const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__RealFFT__Table.html#gac52f98b52a1f03bfac8b57a67ba07397">realCoefB</a> [8192]</td></tr> <tr class="separator:gac52f98b52a1f03bfac8b57a67ba07397"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga11e84d0ee257a547f749b37dd0078d36"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> <a class="el" href="arm__math_8h.html#a280a402ab28c399fcc4168f2ed631acb">ALIGN4</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__RealFFT__Table.html#ga11e84d0ee257a547f749b37dd0078d36">realCoefAQ15</a> [8192]</td></tr> <tr class="separator:ga11e84d0ee257a547f749b37dd0078d36"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:gac871666f018b70938b2b98017628cb97"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> <a class="el" href="arm__math_8h.html#a280a402ab28c399fcc4168f2ed631acb">ALIGN4</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__RealFFT__Table.html#gac871666f018b70938b2b98017628cb97">realCoefBQ15</a> [8192]</td></tr> <tr class="separator:gac871666f018b70938b2b98017628cb97"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:gaf1592a6cf0504675205074a43c3728a2"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__RealFFT__Table.html#gaf1592a6cf0504675205074a43c3728a2">realCoefAQ31</a> [8192]</td></tr> <tr class="separator:gaf1592a6cf0504675205074a43c3728a2"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga1eb5745728a61c3715755f5d69a4a960"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__RealFFT__Table.html#ga1eb5745728a61c3715755f5d69a4a960">realCoefBQ31</a> [8192]</td></tr> <tr class="separator:ga1eb5745728a61c3715755f5d69a4a960"><td class="memSeparator" colspan="2"> </td></tr> </table> <a name="details" id="details"></a><h2 class="groupheader">Description</h2> <h2 class="groupheader">Variable Documentation</h2> <a class="anchor" id="ga8b1ad947c470596674fa3364e16045c6"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> realCoefA[8192]</td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">static</span></span> </td> </tr> </table> </div><div class="memdoc"> <dl class="section user"><dt></dt><dd>Generation of realCoefA array: </dd></dl> <dl class="section user"><dt></dt><dd>n = 4096 <pre>for (i = 0; i < n; i++) { pATable[2 * i] = 0.5 * (1.0 - sin (2 * PI / (double) (2 * n) * (double) i)); pATable[2 * i + 1] = 0.5 * (-1.0 * cos (2 * PI / (double) (2 * n) * (double) i)); } </pre> </dd></dl> <p>Referenced by <a class="el" href="group__RealFFT.html#ga10717ee326bf50832ef1c25b85a23068">arm_rfft_init_f32()</a>.</p> </div> </div> <a class="anchor" id="ga11e84d0ee257a547f749b37dd0078d36"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> <a class="el" href="arm__math_8h.html#a280a402ab28c399fcc4168f2ed631acb">ALIGN4</a> realCoefAQ15[8192]</td> </tr> </table> </div><div class="memdoc"> <dl class="section user"><dt></dt><dd>Generation fixed-point realCoefAQ15 array in Q15 format: </dd></dl> <dl class="section user"><dt></dt><dd>n = 4096 <pre>for (i = 0; i < n; i++) { pATable[2 * i] = 0.5 * (1.0 - sin (2 * PI / (double) (2 * n) * (double) i)); pATable[2 * i + 1] = 0.5 * (-1.0 * cos (2 * PI / (double) (2 * n) * (double) i)); } </pre> </dd></dl> <dl class="section user"><dt></dt><dd>Convert to fixed point Q15 format round(pATable[i] * pow(2, 15)) </dd></dl> <p>Referenced by <a class="el" href="group__RealFFT.html#ga053450cc600a55410ba5b5605e96245d">arm_rfft_init_q15()</a>.</p> </div> </div> <a class="anchor" id="gaf1592a6cf0504675205074a43c3728a2"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> realCoefAQ31[8192]</td> </tr> </table> </div><div class="memdoc"> <dl class="section user"><dt></dt><dd>Generation fixed-point realCoefAQ31 array in Q31 format: </dd></dl> <dl class="section user"><dt></dt><dd>n = 4096 <pre>for (i = 0; i < n; i++) { pATable[2 * i] = 0.5 * (1.0 - sin (2 * PI / (double) (2 * n) * (double) i)); pATable[2 * i + 1] = 0.5 * (-1.0 * cos (2 * PI / (double) (2 * n) * (double) i)); }</pre> </dd></dl> <dl class="section user"><dt></dt><dd>Convert to fixed point Q31 format round(pATable[i] * pow(2, 31)) </dd></dl> <p>Referenced by <a class="el" href="group__RealFFT.html#ga5abde938abbe72e95c5bab080eb33c45">arm_rfft_init_q31()</a>.</p> </div> </div> <a class="anchor" id="gac52f98b52a1f03bfac8b57a67ba07397"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> realCoefB[8192]</td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">static</span></span> </td> </tr> </table> </div><div class="memdoc"> <dl class="section user"><dt></dt><dd>Generation of realCoefB array: </dd></dl> <dl class="section user"><dt></dt><dd>n = 4096 <pre>for (i = 0; i < n; i++) { pBTable[2 * i] = 0.5 * (1.0 + sin (2 * PI / (double) (2 * n) * (double) i)); pBTable[2 * i + 1] = 0.5 * (1.0 * cos (2 * PI / (double) (2 * n) * (double) i)); } </pre> </dd></dl> <p>Referenced by <a class="el" href="group__RealFFT.html#ga10717ee326bf50832ef1c25b85a23068">arm_rfft_init_f32()</a>.</p> </div> </div> <a class="anchor" id="gac871666f018b70938b2b98017628cb97"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> <a class="el" href="arm__math_8h.html#a280a402ab28c399fcc4168f2ed631acb">ALIGN4</a> realCoefBQ15[8192]</td> </tr> </table> </div><div class="memdoc"> <dl class="section user"><dt></dt><dd>Generation of real_CoefB array: </dd></dl> <dl class="section user"><dt></dt><dd>n = 4096 <pre>for (i = 0; i < n; i++) { pBTable[2 * i] = 0.5 * (1.0 + sin (2 * PI / (double) (2 * n) * (double) i)); pBTable[2 * i + 1] = 0.5 * (1.0 * cos (2 * PI / (double) (2 * n) * (double) i)); } </pre> </dd></dl> <dl class="section user"><dt></dt><dd>Convert to fixed point Q15 format round(pBTable[i] * pow(2, 15)) </dd></dl> <p>Referenced by <a class="el" href="group__RealFFT.html#ga053450cc600a55410ba5b5605e96245d">arm_rfft_init_q15()</a>.</p> </div> </div> <a class="anchor" id="ga1eb5745728a61c3715755f5d69a4a960"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> realCoefBQ31[8192]</td> </tr> </table> </div><div class="memdoc"> <dl class="section user"><dt></dt><dd>Generation of realCoefBQ31 array: </dd></dl> <dl class="section user"><dt></dt><dd>n = 4096 <pre>for (i = 0; i < n; i++) { pBTable[2 * i] = 0.5 * (1.0 + sin (2 * PI / (double) (2 * n) * (double) i)); pBTable[2 * i + 1] = 0.5 * (1.0 * cos (2 * PI / (double) (2 * n) * (double) i)); } </pre> </dd></dl> <dl class="section user"><dt></dt><dd>Convert to fixed point Q31 format round(pBTable[i] * pow(2, 31)) </dd></dl> <p>Referenced by <a class="el" href="group__RealFFT.html#ga5abde938abbe72e95c5bab080eb33c45">arm_rfft_init_q31()</a>.</p> </div> </div> </div><!-- contents --> </div><!-- doc-content --> <!-- start footer part --> <div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> <ul> <li class="footer">Generated on Wed Feb 8 2017 10:20:51 for CMSIS-DSP by ARM Ltd. All rights reserved. <!-- <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.6 --> </li> </ul> </div> </body> </html>