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<h1>gr_ofdm_frame_sink.h</h1> </div>
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<a href="gr__ofdm__frame__sink_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- c++ -*- */</span>
<a name="l00002"></a>00002 <span class="comment">/*</span>
<a name="l00003"></a>00003 <span class="comment"> * Copyright 2007 Free Software Foundation, Inc.</span>
<a name="l00004"></a>00004 <span class="comment"> * </span>
<a name="l00005"></a>00005 <span class="comment"> * This file is part of GNU Radio</span>
<a name="l00006"></a>00006 <span class="comment"> * </span>
<a name="l00007"></a>00007 <span class="comment"> * GNU Radio is free software; you can redistribute it and/or modify</span>
<a name="l00008"></a>00008 <span class="comment"> * it under the terms of the GNU General Public License as published by</span>
<a name="l00009"></a>00009 <span class="comment"> * the Free Software Foundation; either version 3, or (at your option)</span>
<a name="l00010"></a>00010 <span class="comment"> * any later version.</span>
<a name="l00011"></a>00011 <span class="comment"> * </span>
<a name="l00012"></a>00012 <span class="comment"> * GNU Radio is distributed in the hope that it will be useful,</span>
<a name="l00013"></a>00013 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00014"></a>00014 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<a name="l00015"></a>00015 <span class="comment"> * GNU General Public License for more details.</span>
<a name="l00016"></a>00016 <span class="comment"> * </span>
<a name="l00017"></a>00017 <span class="comment"> * You should have received a copy of the GNU General Public License</span>
<a name="l00018"></a>00018 <span class="comment"> * along with GNU Radio; see the file COPYING. If not, write to</span>
<a name="l00019"></a>00019 <span class="comment"> * the Free Software Foundation, Inc., 51 Franklin Street,</span>
<a name="l00020"></a>00020 <span class="comment"> * Boston, MA 02110-1301, USA.</span>
<a name="l00021"></a>00021 <span class="comment"> */</span>
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="preprocessor">#ifndef INCLUDED_GR_OFDM_FRAME_SINK_H</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span><span class="preprocessor">#define INCLUDED_GR_OFDM_FRAME_SINK_H</span>
<a name="l00025"></a>00025 <span class="preprocessor"></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <gr_sync_block.h></span>
<a name="l00027"></a>00027 <span class="preprocessor">#include <gr_msg_queue.h></span>
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="keyword">class </span><a class="code" href="classgr__ofdm__frame__sink.html" title="Takes an OFDM symbol in, demaps it into bits of 0&#39;s and 1&#39;s, packs them into packets...">gr_ofdm_frame_sink</a>;
<a name="l00030"></a>00030 <span class="keyword">typedef</span> <a class="code" href="classboost_1_1shared__ptr.html" title="shared_ptr documentation stub">boost::shared_ptr<gr_ofdm_frame_sink></a> <a class="code" href="classboost_1_1shared__ptr.html" title="shared_ptr documentation stub">gr_ofdm_frame_sink_sptr</a>;
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <a class="code" href="classboost_1_1shared__ptr.html" title="shared_ptr documentation stub">gr_ofdm_frame_sink_sptr</a>
<a name="l00033"></a>00033 <a class="code" href="gr__ofdm__frame__sink_8h.html#a24144f4a7e5ff890de27f5c6258cd658">gr_make_ofdm_frame_sink</a> (<span class="keyword">const</span> <a class="code" href="classstd_1_1vector.html">std::vector<gr_complex></a> &sym_position,
<a name="l00034"></a>00034 <span class="keyword">const</span> <a class="code" href="classstd_1_1vector.html">std::vector<unsigned char></a> &sym_value_out,
<a name="l00035"></a>00035 <a class="code" href="classboost_1_1shared__ptr.html" title="shared_ptr documentation stub">gr_msg_queue_sptr</a> target_queue, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> occupied_tones,
<a name="l00036"></a>00036 <span class="keywordtype">float</span> phase_gain=0.25, <span class="keywordtype">float</span> freq_gain=0.25*0.25/4.0);
<a name="l00037"></a>00037 <span class="comment"></span>
<a name="l00038"></a>00038 <span class="comment">/*!</span>
<a name="l00039"></a>00039 <span class="comment"> * \brief Takes an OFDM symbol in, demaps it into bits of 0's and 1's, packs</span>
<a name="l00040"></a>00040 <span class="comment"> * them into packets, and sends to to a message queue sink.</span>
<a name="l00041"></a>00041 <span class="comment"> * \ingroup sink_blk</span>
<a name="l00042"></a>00042 <span class="comment"> * \ingroup ofdm_blk</span>
<a name="l00043"></a>00043 <span class="comment"> *</span>
<a name="l00044"></a>00044 <span class="comment"> * NOTE: The mod input parameter simply chooses a pre-defined demapper/slicer. Eventually,</span>
<a name="l00045"></a>00045 <span class="comment"> * we want to be able to pass in a reference to an object to do the demapping and slicing</span>
<a name="l00046"></a>00046 <span class="comment"> * for a given modulation type.</span>
<a name="l00047"></a>00047 <span class="comment"> */</span>
<a name="l00048"></a><a class="code" href="classgr__ofdm__frame__sink.html">00048</a> <span class="keyword">class </span><a class="code" href="classgr__ofdm__frame__sink.html" title="Takes an OFDM symbol in, demaps it into bits of 0&#39;s and 1&#39;s, packs them into packets...">gr_ofdm_frame_sink</a> : <span class="keyword">public</span> <a class="code" href="classgr__sync__block.html" title="synchronous 1:1 input to output with historyOverride work to provide the signal processing implementa...">gr_sync_block</a>
<a name="l00049"></a>00049 {
<a name="l00050"></a>00050 <span class="keyword">friend</span> <a class="code" href="classboost_1_1shared__ptr.html" title="shared_ptr documentation stub">gr_ofdm_frame_sink_sptr</a>
<a name="l00051"></a>00051 <a class="code" href="classgr__ofdm__frame__sink.html#ae6326404ed8917c076d888f1e3c3e50f">gr_make_ofdm_frame_sink</a> (<span class="keyword">const</span> <a class="code" href="classstd_1_1vector.html">std::vector<gr_complex></a> &sym_position,
<a name="l00052"></a>00052 <span class="keyword">const</span> <a class="code" href="classstd_1_1vector.html">std::vector<unsigned char></a> &sym_value_out,
<a name="l00053"></a>00053 <a class="code" href="classboost_1_1shared__ptr.html">gr_msg_queue_sptr</a> target_queue, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> occupied_tones,
<a name="l00054"></a>00054 <span class="keywordtype">float</span> phase_gain, <span class="keywordtype">float</span> freq_gain);
<a name="l00055"></a>00055
<a name="l00056"></a>00056 <span class="keyword">private</span>:
<a name="l00057"></a>00057 <span class="keyword">enum</span> state_t {STATE_SYNC_SEARCH, STATE_HAVE_SYNC, STATE_HAVE_HEADER};
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> MAX_PKT_LEN = 4096;
<a name="l00060"></a>00060 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> HEADERBYTELEN = 4;
<a name="l00061"></a>00061
<a name="l00062"></a>00062 <a class="code" href="classboost_1_1shared__ptr.html">gr_msg_queue_sptr</a> d_target_queue; <span class="comment">// where to send the packet when received</span>
<a name="l00063"></a>00063 state_t d_state;
<a name="l00064"></a>00064 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> d_header; <span class="comment">// header bits</span>
<a name="l00065"></a>00065 <span class="keywordtype">int</span> d_headerbytelen_cnt; <span class="comment">// how many so far</span>
<a name="l00066"></a>00066
<a name="l00067"></a>00067 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *d_bytes_out; <span class="comment">// hold the current bytes produced by the demapper </span>
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> d_occupied_carriers;
<a name="l00070"></a>00070 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> d_byte_offset;
<a name="l00071"></a>00071 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> d_partial_byte;
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> d_packet[MAX_PKT_LEN]; <span class="comment">// assembled payload</span>
<a name="l00074"></a>00074 <span class="keywordtype">int</span> d_packetlen; <span class="comment">// length of packet</span>
<a name="l00075"></a>00075 <span class="keywordtype">int</span> d_packet_whitener_offset; <span class="comment">// offset into whitener string to use</span>
<a name="l00076"></a>00076 <span class="keywordtype">int</span> d_packetlen_cnt; <span class="comment">// how many so far</span>
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <a class="code" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> * d_derotated_output; <span class="comment">// Pointer to output stream to send deroated symbols out</span>
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <a class="code" href="classstd_1_1vector.html">std::vector<gr_complex></a> d_sym_position;
<a name="l00081"></a>00081 <a class="code" href="classstd_1_1vector.html">std::vector<unsigned char></a> d_sym_value_out;
<a name="l00082"></a>00082 <a class="code" href="classstd_1_1vector.html">std::vector<gr_complex></a> d_dfe;
<a name="l00083"></a>00083 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> d_nbits;
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> d_resid;
<a name="l00086"></a>00086 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> d_nresid;
<a name="l00087"></a>00087 <span class="keywordtype">float</span> d_phase;
<a name="l00088"></a>00088 <span class="keywordtype">float</span> d_freq;
<a name="l00089"></a>00089 <span class="keywordtype">float</span> d_phase_gain;
<a name="l00090"></a>00090 <span class="keywordtype">float</span> d_freq_gain;
<a name="l00091"></a>00091 <span class="keywordtype">float</span> d_eq_gain;
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <a class="code" href="classstd_1_1vector.html">std::vector<int></a> d_subcarrier_map;
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="keyword">protected</span>:
<a name="l00096"></a>00096 <a class="code" href="classgr__ofdm__frame__sink.html#a4c70885da3dccf6e629b755d24021294">gr_ofdm_frame_sink</a>(<span class="keyword">const</span> <a class="code" href="classstd_1_1vector.html">std::vector<gr_complex></a> &sym_position,
<a name="l00097"></a>00097 <span class="keyword">const</span> <a class="code" href="classstd_1_1vector.html">std::vector<unsigned char></a> &sym_value_out,
<a name="l00098"></a>00098 <a class="code" href="classboost_1_1shared__ptr.html">gr_msg_queue_sptr</a> target_queue, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> occupied_tones,
<a name="l00099"></a>00099 <span class="keywordtype">float</span> phase_gain, <span class="keywordtype">float</span> freq_gain);
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="keywordtype">void</span> <a class="code" href="classgr__ofdm__frame__sink.html#a3cf5140b2d7b665b66ef1b9ffb0714ea">enter_search</a>();
<a name="l00102"></a>00102 <span class="keywordtype">void</span> <a class="code" href="classgr__ofdm__frame__sink.html#aa632ea6f0d13403e564f56b0687aae66">enter_have_sync</a>();
<a name="l00103"></a>00103 <span class="keywordtype">void</span> <a class="code" href="classgr__ofdm__frame__sink.html#a6faac7711732a155c65a3c7707266415">enter_have_header</a>();
<a name="l00104"></a>00104
<a name="l00105"></a><a class="code" href="classgr__ofdm__frame__sink.html#aa510595d0cc0bc55c7a4ae647cf229bd">00105</a> <span class="keywordtype">bool</span> <a class="code" href="classgr__ofdm__frame__sink.html#aa510595d0cc0bc55c7a4ae647cf229bd">header_ok</a>()
<a name="l00106"></a>00106 {
<a name="l00107"></a>00107 <span class="comment">// confirm that two copies of header info are identical</span>
<a name="l00108"></a>00108 <span class="keywordflow">return</span> ((d_header >> 16) ^ (d_header & 0xffff)) == 0;
<a name="l00109"></a>00109 }
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="classgr__ofdm__frame__sink.html#a0d478f55e3b444de83dfae334531814a">slicer</a>(<span class="keyword">const</span> <a class="code" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> x);
<a name="l00112"></a>00112 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="classgr__ofdm__frame__sink.html#ab38ea04690149eaaaf1e963050183737">demapper</a>(<span class="keyword">const</span> <a class="code" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> *in,
<a name="l00113"></a>00113 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *out);
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="keywordtype">bool</span> <a class="code" href="classgr__ofdm__frame__sink.html#a94060d9740588572cae62914e527a558">set_sym_value_out</a>(<span class="keyword">const</span> <a class="code" href="classstd_1_1vector.html">std::vector<gr_complex></a> &sym_position,
<a name="l00116"></a>00116 <span class="keyword">const</span> <a class="code" href="classstd_1_1vector.html">std::vector<unsigned char></a> &sym_value_out);
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <span class="keyword">public</span>:
<a name="l00119"></a>00119 <a class="code" href="classgr__ofdm__frame__sink.html#a4408441371b0a5b1b64be1d959b2381b">~gr_ofdm_frame_sink</a>();
<a name="l00120"></a>00120
<a name="l00121"></a>00121 <span class="keywordtype">int</span> <a class="code" href="classgr__ofdm__frame__sink.html#a9cbbd6669ff730bc510c7f13b0517920" title="just like gr_block::general_work, only this arranges to call consume_each for you">work</a>(<span class="keywordtype">int</span> noutput_items,
<a name="l00122"></a>00122 <a class="code" href="classstd_1_1vector.html">gr_vector_const_void_star</a> &input_items,
<a name="l00123"></a>00123 <a class="code" href="classstd_1_1vector.html">gr_vector_void_star</a> &output_items);
<a name="l00124"></a>00124 };
<a name="l00125"></a>00125
<a name="l00126"></a>00126 <span class="preprocessor">#endif </span><span class="comment">/* INCLUDED_GR_OFDM_FRAME_SINK_H */</span>
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