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67<h1>commfunc.h File Reference</h1>Definitions of some specific functions useful in communications. 
68<a href="#_details">More...</a>
69<p>
70<code>#include &lt;<a class="el" href="mat_8h-source.html">itpp/base/mat.h</a>&gt;</code><br>
71<code>#include &lt;<a class="el" href="vec_8h-source.html">itpp/base/vec.h</a>&gt;</code><br>
72
73<p>
74<a href="commfunc_8h-source.html">Go to the source code of this file.</a><table border="0" cellpadding="0" cellspacing="0">
75<tr><td></td></tr>
76<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
77<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="g568738607726089989baf278058899fd"></a><!-- doxytag: member="commfunc.h::graycode" ref="g568738607726089989baf278058899fd" args="(int m)" -->
78<a class="el" href="mat_8h.html#f90acd1af41bf2d1d8a4bb23662fff69">bmat</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__misccommfunc.html#g568738607726089989baf278058899fd">itpp::graycode</a> (int m)</td></tr>
79
80<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Generate Gray code of blocklength m.<p>
81The codes are contained as binary codewords {0,1} in the rows of the returned matrix. See also the <code>gray()</code> function in <code>math/scalfunc.h</code>. <br></td></tr>
82<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="g3815994ee069b1911dec1fc6afc350c8"></a><!-- doxytag: member="commfunc.h::hamming_distance" ref="g3815994ee069b1911dec1fc6afc350c8" args="(const bvec &amp;a, const bvec &amp;b)" -->
83int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__misccommfunc.html#g3815994ee069b1911dec1fc6afc350c8">itpp::hamming_distance</a> (const <a class="el" href="classitpp_1_1Vec.html#e10151f44bbabf17b670a9493d8088cf">bvec</a> &amp;a, const <a class="el" href="classitpp_1_1Vec.html#e10151f44bbabf17b670a9493d8088cf">bvec</a> &amp;b)</td></tr>
84
85<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Calculate the Hamming distance between <em>a</em> and <em>b</em>. <br></td></tr>
86<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="g1661dfd39dc7327de562d3eca3d113aa"></a><!-- doxytag: member="commfunc.h::weight" ref="g1661dfd39dc7327de562d3eca3d113aa" args="(const bvec &amp;a)" -->
87int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__misccommfunc.html#g1661dfd39dc7327de562d3eca3d113aa">itpp::weight</a> (const <a class="el" href="classitpp_1_1Vec.html#e10151f44bbabf17b670a9493d8088cf">bvec</a> &amp;a)</td></tr>
88
89<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Calculate the Hamming weight of <em>a</em>. <br></td></tr>
90<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classitpp_1_1Vec.html#02e1bb55f60f3c2eb7a020eb1c2cfcf4">vec</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__misccommfunc.html#gc2ed3971292517906bb3fa47e9bfb061">itpp::waterfilling</a> (const <a class="el" href="classitpp_1_1Vec.html#02e1bb55f60f3c2eb7a020eb1c2cfcf4">vec</a> &amp;alpha, double P)</td></tr>
91
92<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Compute the water-filling solution<p>
93This function computes the solution of the water-filling problem <p class="formulaDsp">
94<img class="formulaDsp" alt="\[ \max_{p_0,...,p_{n-1}} \sum_{i=0}^{n-1} \log\left(1+p_i\alpha_i\right) \]" src="form_237.png">
95<p>
96 subject to <p class="formulaDsp">
97<img class="formulaDsp" alt="\[ \sum_{i=0}^{n-1} p_i \le P \]" src="form_238.png">
98<p>
99.  <a href="group__misccommfunc.html#gc2ed3971292517906bb3fa47e9bfb061"></a><br></td></tr>
100</table>
101<hr><a name="_details"></a><h2>Detailed Description</h2>
102Definitions of some specific functions useful in communications.
103<p>
104<dl class="author" compact><dt><b>Author:</b></dt><dd>Tony Ottosson and Erik G. Larsson</dd></dl>
105-------------------------------------------------------------------------<p>
106Copyright (C) 1995-2008 (see AUTHORS file for a list of contributors)<p>
107This file is part of IT++ - a C++ library of mathematical, signal processing, speech processing, and communications classes and functions.<p>
108IT++ is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.<p>
109IT++ is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.<p>
110You should have received a copy of the GNU General Public License along with IT++. If not, see &lt;<a href="http://www.gnu.org/licenses/">http://www.gnu.org/licenses/</a>&gt;.<p>
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