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<div class="title">Interleaving and de-interleaving of data </div>  </div>
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<div class="textblock"><p>This example shows how to use one of the interleaving classes.</p>
<div class="fragment"><div class="line"><span class="preprocessor">#include &lt;<a class="code" href="itcomm_8h.html">itpp/itcomm.h</a>&gt;</span></div><div class="line"></div><div class="line"><span class="keyword">using namespace </span><a class="code" href="namespaceitpp.html">itpp</a>;</div><div class="line"></div><div class="line"><span class="comment">//These lines are needed for use of cout and endl</span></div><div class="line"><span class="keyword">using</span> std::cout;</div><div class="line"><span class="keyword">using</span> std::endl;</div><div class="line"></div><div class="line"><span class="keywordtype">int</span> main()</div><div class="line">{</div><div class="line">  <span class="comment">//Declare scalars and vectors:</span></div><div class="line">  <span class="keywordtype">int</span> rows, cols;</div><div class="line">  ivec input, output, deinterleaved;</div><div class="line"></div><div class="line">  <span class="comment">//Declare the interleaver. The interleaver classes are templated, and therefore we must specify</span></div><div class="line">  <span class="comment">//the type of the data elements. In this example we are using integers:</span></div><div class="line">  <a class="code" href="classitpp_1_1Block__Interleaver.html">Block_Interleaver&lt;int&gt;</a> my_interleaver;</div><div class="line"></div><div class="line">  <span class="comment">//Initialize the interleaver class. Note that this can be done already in the declaration by writing</span></div><div class="line">  <span class="comment">//Block_Interleaver&lt;int&gt; my_interleaver(rows,cols);</span></div><div class="line">  rows = 4;</div><div class="line">  cols = 5;</div><div class="line">  my_interleaver.<a class="code" href="classitpp_1_1Block__Interleaver.html#ac52dd1b18110528bba6ce67937d14024">set_rows</a>(rows);</div><div class="line">  my_interleaver.<a class="code" href="classitpp_1_1Block__Interleaver.html#a7c933fa3a6bec600b3eb0fbfd62ad786">set_cols</a>(cols);</div><div class="line"></div><div class="line">  <span class="comment">//Define the input to the interleaver:</span></div><div class="line">  input = <span class="stringliteral">&quot;1:20&quot;</span>;</div><div class="line"></div><div class="line">  <span class="comment">//Do the interleaving:</span></div><div class="line">  output = my_interleaver.<a class="code" href="classitpp_1_1Block__Interleaver.html#a250fc156ccb4545850f0d9e72495bec3">interleave</a>(input);</div><div class="line"></div><div class="line">  <span class="comment">//Do the de-interleaving:</span></div><div class="line">  deinterleaved = my_interleaver.<a class="code" href="classitpp_1_1Block__Interleaver.html#a0c82b6bed55a14a3f7b8580668ab4bc5">deinterleave</a>(output);</div><div class="line"></div><div class="line">  <span class="comment">//Print the results:</span></div><div class="line">  cout &lt;&lt; <span class="stringliteral">&quot;input = &quot;</span> &lt;&lt; input &lt;&lt; endl;</div><div class="line">  cout &lt;&lt; <span class="stringliteral">&quot;output = &quot;</span> &lt;&lt; output &lt;&lt; endl;</div><div class="line">  cout &lt;&lt; <span class="stringliteral">&quot;deinterleaved = &quot;</span> &lt;&lt; deinterleaved &lt;&lt; endl;</div><div class="line"></div><div class="line">  <span class="comment">//Exit program:</span></div><div class="line">  <span class="keywordflow">return</span> 0;</div><div class="line"></div><div class="line">}</div></div><!-- fragment --><p>When you run this program, the output will look like this:</p>
<div class="fragment"><div class="line">input = [1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20]</div><div class="line">output = [1 5 9 13 17 2 6 10 14 18 3 7 11 15 19 4 8 12 16 20]</div><div class="line">deinterleaved = [1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20]</div></div><!-- fragment --> </div></div><!-- contents -->
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