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href="group__group_cmplx_math.html">Complex Math Functions</a></div></div><!--header--> +<div class="contents"> +<table class="memberdecls"> +<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a> +Functions</h2></td></tr> +<tr class="memitem:gaa7faccc0d96b061d8b7d0d7d82045074"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__cmplx__mag__squared.html#gaa7faccc0d96b061d8b7d0d7d82045074">arm_cmplx_mag_squared_f32</a> (<a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *pSrc, <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *pDst, uint32_t numSamples)</td></tr> +<tr class="memdesc:gaa7faccc0d96b061d8b7d0d7d82045074"><td class="mdescLeft"> </td><td class="mdescRight">Floating-point complex magnitude squared. <a href="#gaa7faccc0d96b061d8b7d0d7d82045074"></a><br/></td></tr> +<tr class="separator:gaa7faccc0d96b061d8b7d0d7d82045074"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:ga45537f576102d960d467eb722b8431f2"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__cmplx__mag__squared.html#ga45537f576102d960d467eb722b8431f2">arm_cmplx_mag_squared_q15</a> (<a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pSrc, <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pDst, uint32_t numSamples)</td></tr> +<tr class="memdesc:ga45537f576102d960d467eb722b8431f2"><td class="mdescLeft"> </td><td class="mdescRight">Q15 complex magnitude squared. <a href="#ga45537f576102d960d467eb722b8431f2"></a><br/></td></tr> +<tr class="separator:ga45537f576102d960d467eb722b8431f2"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:ga384b0538101e8c03fa4fa14271e63b04"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__cmplx__mag__squared.html#ga384b0538101e8c03fa4fa14271e63b04">arm_cmplx_mag_squared_q31</a> (<a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrc, <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pDst, uint32_t numSamples)</td></tr> +<tr class="memdesc:ga384b0538101e8c03fa4fa14271e63b04"><td class="mdescLeft"> </td><td class="mdescRight">Q31 complex magnitude squared. <a href="#ga384b0538101e8c03fa4fa14271e63b04"></a><br/></td></tr> +<tr class="separator:ga384b0538101e8c03fa4fa14271e63b04"><td class="memSeparator" colspan="2"> </td></tr> +</table> +<a name="details" id="details"></a><h2 class="groupheader">Description</h2> +<p>Computes the magnitude squared of the elements of a complex data vector.</p> +<p>The <code>pSrc</code> points to the source data and <code>pDst</code> points to the where the result should be written. <code>numSamples</code> specifies the number of complex samples in the input array and the data is stored in an interleaved fashion (real, imag, real, imag, ...). The input array has a total of <code>2*numSamples</code> values; the output array has a total of <code>numSamples</code> values.</p> +<p>The underlying algorithm is used:</p> +<pre> +for(n=0; n<numSamples; n++) { + pDst[n] = pSrc[(2*n)+0]^2 + pSrc[(2*n)+1]^2; +} +</pre><p>There are separate functions for floating-point, Q15, and Q31 data types. </p> +<h2 class="groupheader">Function Documentation</h2> +<a class="anchor" id="gaa7faccc0d96b061d8b7d0d7d82045074"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">void arm_cmplx_mag_squared_f32 </td> + <td>(</td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> * </td> + <td class="paramname"><em>pSrc</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> * </td> + <td class="paramname"><em>pDst</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype">uint32_t </td> + <td class="paramname"><em>numSamples</em> </td> + </tr> + <tr> + <td></td> + <td>)</td> + <td></td><td></td> + </tr> + </table> +</div><div class="memdoc"> +<dl class="params"><dt>Parameters</dt><dd> + <table class="params"> + <tr><td class="paramdir">[in]</td><td class="paramname">*pSrc</td><td>points to the complex input vector </td></tr> + <tr><td class="paramdir">[out]</td><td class="paramname">*pDst</td><td>points to the real output vector </td></tr> + <tr><td class="paramdir">[in]</td><td class="paramname">numSamples</td><td>number of complex samples in the input vector </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>none. </dd></dl> + +</div> +</div> +<a class="anchor" id="ga45537f576102d960d467eb722b8431f2"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">void arm_cmplx_mag_squared_q15 </td> + <td>(</td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> * </td> + <td class="paramname"><em>pSrc</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> * </td> + <td class="paramname"><em>pDst</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype">uint32_t </td> + <td class="paramname"><em>numSamples</em> </td> + </tr> + <tr> + <td></td> + <td>)</td> + <td></td><td></td> + </tr> + </table> +</div><div class="memdoc"> +<dl class="params"><dt>Parameters</dt><dd> + <table class="params"> + <tr><td class="paramname">*pSrc</td><td>points to the complex input vector </td></tr> + <tr><td class="paramname">*pDst</td><td>points to the real output vector </td></tr> + <tr><td class="paramname">numSamples</td><td>number of complex samples in the input vector </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>none.</dd></dl> +<p><b>Scaling and Overflow Behavior:</b> </p> +<dl class="section user"><dt></dt><dd>The function implements 1.15 by 1.15 multiplications and finally output is converted into 3.13 format. </dd></dl> + +<p>References <a class="el" href="arm__math_8h.html#a9de2e0a5785be82866bcb96012282248">__SIMD32</a>.</p> + +</div> +</div> +<a class="anchor" id="ga384b0538101e8c03fa4fa14271e63b04"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">void arm_cmplx_mag_squared_q31 </td> + <td>(</td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> * </td> + <td class="paramname"><em>pSrc</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> * </td> + <td class="paramname"><em>pDst</em>, </td> + </tr> + <tr> + <td class="paramkey"></td> + <td></td> + <td class="paramtype">uint32_t </td> + <td class="paramname"><em>numSamples</em> </td> + </tr> + <tr> + <td></td> + <td>)</td> + <td></td><td></td> + </tr> + </table> +</div><div class="memdoc"> +<dl class="params"><dt>Parameters</dt><dd> + <table class="params"> + <tr><td class="paramname">*pSrc</td><td>points to the complex input vector </td></tr> + <tr><td class="paramname">*pDst</td><td>points to the real output vector </td></tr> + <tr><td class="paramname">numSamples</td><td>number of complex samples in the input vector </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>none.</dd></dl> +<p><b>Scaling and Overflow Behavior:</b> </p> +<dl class="section user"><dt></dt><dd>The function implements 1.31 by 1.31 multiplications and finally output is converted into 3.29 format. Input down scaling is not required. </dd></dl> + +</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 Tue Oct 27 2015 14:35:33 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> 1.8.2 + --> + </li> + </ul> +</div> +</body> +</html> |