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<div class="title">digital_cpmmod_bc.h</div> </div>
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<a href="digital__cpmmod__bc_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* -*- c++ -*- */</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright 2010 Free Software Foundation, Inc.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * This file is part of GNU Radio</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * GNU Radio is free software; you can redistribute it and/or modify</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * it under the terms of the GNU General Public License as published by</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * the Free Software Foundation; either version 3, or (at your option)</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * any later version.</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * GNU Radio is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * GNU General Public License for more details.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * You should have received a copy of the GNU General Public License</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * along with GNU Radio; see the file COPYING. If not, write to</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * the Free Software Foundation, Inc., 51 Franklin Street,</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * Boston, MA 02110-1301, USA.</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#ifndef INCLUDED_DIGITAL_CPMMOD_BC_H</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor"></span><span class="preprocessor">#define INCLUDED_DIGITAL_CPMMOD_BC_H</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <<a class="code" href="digital__api_8h.html">digital_api.h</a>></span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include <<a class="code" href="gr__hier__block2_8h.html">gr_hier_block2.h</a>></span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <<a class="code" href="gr__char__to__float_8h.html">gr_char_to_float.h</a>></span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <gr_interp_fir_filter_fff.h></span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <<a class="code" href="gr__frequency__modulator__fc_8h.html">gr_frequency_modulator_fc.h</a>></span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <<a class="code" href="gr__cpm_8h.html">gr_cpm.h</a>></span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">class </span><a class="code" href="classdigital__cpmmod__bc.html" title="Generic CPM modulator.">digital_cpmmod_bc</a>;</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">typedef</span> <a class="code" href="classboost_1_1shared__ptr.html" title="shared_ptr documentation stub">boost::shared_ptr<digital_cpmmod_bc></a> <a class="code" href="classboost_1_1shared__ptr.html" title="shared_ptr documentation stub">digital_cpmmod_bc_sptr</a>;</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <a class="code" href="digital__api_8h.html#ae14969f36ec69051c4b2f13a0db7e9ba">DIGITAL_API</a> <a class="code" href="classboost_1_1shared__ptr.html" title="shared_ptr documentation stub">digital_cpmmod_bc_sptr</a></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <a class="code" href="digital__cpmmod__bc_8h.html#a6c457d405f04f12427e9448b186c60c2">digital_make_cpmmod_bc</a>(<span class="keywordtype">int</span> type, <span class="keywordtype">float</span> h,</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keywordtype">unsigned</span> samples_per_sym,</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordtype">unsigned</span> L, <span class="keywordtype">double</span> beta=0.3);</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"></span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">/*!</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> * \brief Generic CPM modulator</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * \ingroup modulation_blk</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> * \ingroup digital</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> * \param type The modulation type. Can be one of LREC, LRC, LSRC, TFM</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> * or GAUSSIAN. See gr_cpm::phase_response() for a</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> * detailed description.</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> * \param h The modulation index. \f$ h \cdot \pi\f$ is the maximum</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * phase change that can occur between two symbols, i.e., if</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> * you only send ones, the phase will increase by \f$ h \cdot</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> * \pi\f$ every \p samples_per_sym samples. Set this to 0.5</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> * for Minimum Shift Keying variants.</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> * \param samples_per_sym Samples per symbol.</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * \param L The length of the phase duration in symbols. For L=1, this</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> * yields full- response CPM symbols, for L > 1,</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> * partial-response.</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> * \param beta For LSRC, this is the rolloff factor. For Gaussian</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> * pulses, this is the 3 dB time-bandwidth product.</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> * Examples:</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> * - Setting h = 0.5, L = 1, type = LREC yields MSK.</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> * - Setting h = 0.5, type = GAUSSIAN and beta = 0.3 yields GMSK</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> * as used in GSM.</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> * The input of this block are symbols from an M-ary alphabet</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"> * +/-1, +/-3, ..., +/-(M-1). Usually, M = 2 and therefore, the</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> * valid inputs are +/-1.</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> * The modulator will silently accept any other inputs, though.</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"> * The output is the phase-modulated signal.</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"><a class="code" href="classdigital__cpmmod__bc.html"> 75</a></span> <span class="keyword">class </span><a class="code" href="digital__api_8h.html#ae14969f36ec69051c4b2f13a0db7e9ba">DIGITAL_API</a> <a class="code" href="classdigital__cpmmod__bc.html" title="Generic CPM modulator.">digital_cpmmod_bc</a> : <span class="keyword">public</span> <a class="code" href="classgr__hier__block2.html" title="Hierarchical container class for gr_block's and gr_hier_block2's.">gr_hier_block2</a></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> {</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keyword">friend</span> <a class="code" href="digital__api_8h.html#ae14969f36ec69051c4b2f13a0db7e9ba">DIGITAL_API</a> <a class="code" href="classboost_1_1shared__ptr.html" title="shared_ptr documentation stub">digital_cpmmod_bc_sptr</a></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <a class="code" href="digital__cpmmod__bc_8h.html#a6c457d405f04f12427e9448b186c60c2">digital_make_cpmmod_bc</a>(<span class="keywordtype">int</span> type, <span class="keywordtype">float</span> h,</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordtype">unsigned</span> samples_per_sym,</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordtype">unsigned</span> L, <span class="keywordtype">double</span> beta);</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  </div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  std::vector<float> d_taps;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <a class="code" href="classboost_1_1shared__ptr.html">gr_char_to_float_sptr</a> d_char_to_float;</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  gr_interp_fir_filter_fff_sptr d_pulse_shaper;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <a class="code" href="classboost_1_1shared__ptr.html">gr_frequency_modulator_fc_sptr</a> d_fm;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  </div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="keyword">protected</span>:</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <a class="code" href="classdigital__cpmmod__bc.html" title="Generic CPM modulator.">digital_cpmmod_bc</a>(<a class="code" href="classgr__cpm.html#ab6b758d3b07feab3e8700d9937fe5c7e">gr_cpm::cpm_type</a> type, <span class="keywordtype">float</span> h,</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordtype">unsigned</span> samples_per_sym,</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordtype">unsigned</span> L, <span class="keywordtype">double</span> beta);</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  </div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="keyword">public</span>:<span class="comment"></span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"> //! Return the phase response FIR taps</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"><a class="code" href="classdigital__cpmmod__bc.html#a7ee3ed441b2e08fedd0bee7362d3b952"> 94</a></span> <span class="comment"></span> std::vector<float> <a class="code" href="classdigital__cpmmod__bc.html#a7ee3ed441b2e08fedd0bee7362d3b952" title="Return the phase response FIR taps.">get_taps</a>() { <span class="keywordflow">return</span> d_taps; };</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> };</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="preprocessor">#endif </span><span class="comment">/* INCLUDED_DIGITAL_CPMMOD_BC_H */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="preprocessor"></span></div>
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