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<h1>gr_ofdm_frame_acquisition.h File Reference</h1> </div>
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<div class="textblock"><code>#include <gr_block.h></code><br/>
<code>#include <vector></code><br/>
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Include dependency graph for gr_ofdm_frame_acquisition.h:</div>
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<p><a href="gr__ofdm__frame__acquisition_8h_source.html">Go to the source code of this file.</a></p>
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<tr><td class="memItemLeft" align="right" valign="top">class  </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__ofdm__frame__acquisition.html">gr_ofdm_frame_acquisition</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">take a vector of complex constellation points in from an FFT and performs a correlation and equalization.This block takes the output of an FFT of a received OFDM symbol and finds the start of a frame based on two known symbols. It also looks at the surrounding bins in the FFT output for the correlation in case there is a large frequency shift in the data. This block assumes that the fine frequency shift has already been corrected and that the samples fall in the middle of one FFT bin. <a href="classgr__ofdm__frame__acquisition.html#_details">More...</a><br/></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classboost_1_1shared__ptr.html">gr_ofdm_frame_acquisition_sptr</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="gr__ofdm__frame__acquisition_8h.html#a49a9bd0c41145f54df26ceadef2b0431">gr_make_ofdm_frame_acquisition</a> (unsigned int occupied_carriers, unsigned int fft_length, unsigned int cplen, const <a class="el" href="classstd_1_1vector.html">std::vector</a>< <a class="el" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> > &known_symbol, unsigned int max_fft_shift_len=10)</td></tr>
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<hr/><h2>Function Documentation</h2>
<a class="anchor" id="a49a9bd0c41145f54df26ceadef2b0431"></a><!-- doxytag: member="gr_ofdm_frame_acquisition.h::gr_make_ofdm_frame_acquisition" ref="a49a9bd0c41145f54df26ceadef2b0431" args="(unsigned int occupied_carriers, unsigned int fft_length, unsigned int cplen, const std::vector< gr_complex > &known_symbol, unsigned int max_fft_shift_len=10)" -->
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<td class="memname"><a class="el" href="classboost_1_1shared__ptr.html">gr_ofdm_frame_acquisition_sptr</a> gr_make_ofdm_frame_acquisition </td>
<td>(</td>
<td class="paramtype">unsigned int </td>
<td class="paramname"><em>occupied_carriers</em>, </td>
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<td class="paramtype">unsigned int </td>
<td class="paramname"><em>fft_length</em>, </td>
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<td class="paramtype">unsigned int </td>
<td class="paramname"><em>cplen</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="classstd_1_1vector.html">std::vector</a>< <a class="el" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> > & </td>
<td class="paramname"><em>known_symbol</em>, </td>
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<td class="paramtype">unsigned int </td>
<td class="paramname"><em>max_fft_shift_len</em> = <code>10</code> </td>
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<td>)</td>
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<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">occupied_carriers</td><td>The number of subcarriers with data in the received symbol </td></tr>
<tr><td class="paramname">fft_length</td><td>The size of the FFT vector (occupied_carriers + unused carriers) </td></tr>
<tr><td class="paramname">cplen</td><td>The length of the cycle prefix </td></tr>
<tr><td class="paramname">known_symbol</td><td>A vector of complex numbers representing a known symbol at the start of a frame (usually a BPSK PN sequence) </td></tr>
<tr><td class="paramname">max_fft_shift_len</td><td>Set's the maximum distance you can look between bins for correlation </td></tr>
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