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<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">// -*- coding: utf-8 -*-</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">//</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// Author: Heresh Fattahi, Bryan Riel</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// Copyright 2018-</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> </div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#pragma once</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "forward.h"</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include <cmath></span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include <valarray></span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <isce3/core/Constants.h></span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <isce3/io/Raster.h></span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <isce3/core/LUT1d.h></span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include "Signal.h"</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">// Declaration</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">namespace </span>isce3 { <span class="keyword">namespace </span>signal {</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  <span class="keywordtype">void</span> fftfreq(<span class="keywordtype">double</span> dt, std::valarray<double> &freq);</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> }}</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">template</span><<span class="keyword">class</span> T></div>
<div class="line"><a name="l00027"></a><span class="lineno"><a class="line" href="classisce3_1_1signal_1_1Filter.html"> 27</a></span> <span class="keyword">class </span><a class="code" href="classisce3_1_1signal_1_1Filter.html">isce3::signal::Filter</a> {</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="keyword">public</span>:</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <a class="code" href="classisce3_1_1signal_1_1Filter.html">Filter</a>() {};</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  ~<a class="code" href="classisce3_1_1signal_1_1Filter.html">Filter</a>() {};</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keywordtype">void</span> <a class="code" href="classisce3_1_1signal_1_1Filter.html#ae8ea820fb61350b04ecc1f74b47e8b40">initiateRangeFilter</a>(std::valarray<std::complex<T>> &signal,</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  std::valarray<std::complex<T>> &spectrum,</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordtype">size_t</span> ncols,</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordtype">size_t</span> nrows);</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordtype">void</span> <a class="code" href="classisce3_1_1signal_1_1Filter.html#a67971c40ffb61d48994d247c5c212801">initiateAzimuthFilter</a>(std::valarray<std::complex<T>> &signal,</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  std::valarray<std::complex<T>> &spectrum,</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordtype">size_t</span> ncols,</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordtype">size_t</span> nrows);</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="comment">//void setFilter(std::valarray<std::complex<T>>);</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordtype">void</span> <a class="code" href="classisce3_1_1signal_1_1Filter.html#acd3034e4888d769ce57a10624d1d89a2">constructRangeBandpassFilter</a>(<span class="keywordtype">double</span> rangeSamplingFrequency,</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  std::valarray<double> subBandCenterFrequencies,</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  std::valarray<double> subBandBandwidths,</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  std::valarray<std::complex<T>> &signal,</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  std::valarray<std::complex<T>> &spectrum,</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordtype">size_t</span> ncols,</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordtype">size_t</span> nrows,</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  std::string filterType);</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordtype">void</span> <a class="code" href="classisce3_1_1signal_1_1Filter.html#acd3034e4888d769ce57a10624d1d89a2">constructRangeBandpassFilter</a>(<span class="keywordtype">double</span> rangeSamplingFrequency,</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  std::valarray<double> subBandCenterFrequencies,</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  std::valarray<double> subBandBandwidths,</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordtype">size_t</span> ncols,</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordtype">size_t</span> nrows,</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  std::string filterType);</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordtype">void</span> <a class="code" href="classisce3_1_1signal_1_1Filter.html#a5c23ef1dcc08648189da3af93a24a49a">constructRangeBandpassBoxcar</a>(std::valarray<double> subBandCenterFrequencies,</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  std::valarray<double> subBandBandwidths,</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordtype">double</span> dt,</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordtype">int</span> fft_size,</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  std::valarray<std::complex<T>> &_filter1D);</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordtype">void</span> <a class="code" href="classisce3_1_1signal_1_1Filter.html#abf9a3b05fd71fe642525563b978042aa">constructRangeBandpassCosine</a>(std::valarray<double> subBandCenterFrequencies,</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  std::valarray<double> subBandBandwidths,</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordtype">double</span> dt,</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  std::valarray<double>& frequency,</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordtype">double</span> beta,</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  std::valarray<std::complex<T>>& _filter1D);</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="comment">//T constructRangeCommonbandFilter();</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordtype">void</span> <a class="code" href="classisce3_1_1signal_1_1Filter.html#a308c504c3787f050ccb979ecc410e5b8">constructAzimuthCommonbandFilter</a>(<span class="keyword">const</span> <a class="code" href="classisce3_1_1core_1_1LUT1d.html">isce3::core::LUT1d<double></a> & refDoppler,</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">const</span> <a class="code" href="classisce3_1_1core_1_1LUT1d.html">isce3::core::LUT1d<double></a> & secDoppler,</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordtype">double</span> bandwidth,</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordtype">double</span> prf,</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordtype">double</span> beta,</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  std::valarray<std::complex<T>> &signal,</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  std::valarray<std::complex<T>> &spectrum,</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordtype">size_t</span> ncols,</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordtype">size_t</span> nrows);</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordtype">void</span> <a class="code" href="classisce3_1_1signal_1_1Filter.html#a702db506cf95c7eaadfd2bd5196b3d69">filter</a>(std::valarray<std::complex<T>> &signal,</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  std::valarray<std::complex<T>> &spectrum);</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classisce3_1_1signal_1_1Filter.html#a2323c926f608f76b5e1411471d97516f">indexOfFrequency</a>(<span class="keywordtype">double</span> dt, <span class="keywordtype">int</span> N, <span class="keywordtype">double</span> f, <span class="keywordtype">int</span>& n);</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordtype">void</span> writeFilter(<span class="keywordtype">size_t</span> ncols, <span class="keywordtype">size_t</span> nrows);</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keyword">private</span>:</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <a class="code" href="classisce3_1_1signal_1_1Signal.html">isce3::signal::Signal<T></a> _signal;</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  std::valarray<std::complex<T>> _filter;</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> };</div>
<div class="ttc" id="classisce3_1_1signal_1_1Filter_html_acd3034e4888d769ce57a10624d1d89a2"><div class="ttname"><a href="classisce3_1_1signal_1_1Filter.html#acd3034e4888d769ce57a10624d1d89a2">isce3::signal::Filter::constructRangeBandpassFilter</a></div><div class="ttdeci">void constructRangeBandpassFilter(double rangeSamplingFrequency, std::valarray< double > subBandCenterFrequencies, std::valarray< double > subBandBandwidths, std::valarray< std::complex< T >> &signal, std::valarray< std::complex< T >> &spectrum, size_t ncols, size_t nrows, std::string filterType)</div><div class="ttdoc">Sets an existing filter to be used by the filter object. </div><div class="ttdef"><b>Definition:</b> Filter.cpp:62</div></div>
<div class="ttc" id="classisce3_1_1signal_1_1Filter_html_a2323c926f608f76b5e1411471d97516f"><div class="ttname"><a href="classisce3_1_1signal_1_1Filter.html#a2323c926f608f76b5e1411471d97516f">isce3::signal::Filter::indexOfFrequency</a></div><div class="ttdeci">static void indexOfFrequency(double dt, int N, double f, int &n)</div><div class="ttdoc">Find the index of a specific frequency for a signal with a specific sampling rate. </div></div>
<div class="ttc" id="classisce3_1_1signal_1_1Signal_html"><div class="ttname"><a href="classisce3_1_1signal_1_1Signal.html">isce3::signal::Signal< T ></a></div></div>
<div class="ttc" id="classisce3_1_1signal_1_1Filter_html"><div class="ttname"><a href="classisce3_1_1signal_1_1Filter.html">isce3::signal::Filter</a></div><div class="ttdef"><b>Definition:</b> Filter.h:27</div></div>
<div class="ttc" id="classisce3_1_1core_1_1LUT1d_html"><div class="ttname"><a href="classisce3_1_1core_1_1LUT1d.html">isce3::core::LUT1d< double ></a></div></div>
<div class="ttc" id="classisce3_1_1signal_1_1Filter_html_abf9a3b05fd71fe642525563b978042aa"><div class="ttname"><a href="classisce3_1_1signal_1_1Filter.html#abf9a3b05fd71fe642525563b978042aa">isce3::signal::Filter::constructRangeBandpassCosine</a></div><div class="ttdeci">void constructRangeBandpassCosine(std::valarray< double > subBandCenterFrequencies, std::valarray< double > subBandBandwidths, double dt, std::valarray< double > &frequency, double beta, std::valarray< std::complex< T >> &_filter1D)</div><div class="ttdef"><b>Definition:</b> Filter.cpp:197</div></div>
<div class="ttc" id="classisce3_1_1signal_1_1Filter_html_a5c23ef1dcc08648189da3af93a24a49a"><div class="ttname"><a href="classisce3_1_1signal_1_1Filter.html#a5c23ef1dcc08648189da3af93a24a49a">isce3::signal::Filter::constructRangeBandpassBoxcar</a></div><div class="ttdeci">void constructRangeBandpassBoxcar(std::valarray< double > subBandCenterFrequencies, std::valarray< double > subBandBandwidths, double dt, int fft_size, std::valarray< std::complex< T >> &_filter1D)</div><div class="ttdoc">Construct a box car range band-pass filter for multiple bands. </div><div class="ttdef"><b>Definition:</b> Filter.cpp:146</div></div>
<div class="ttc" id="classisce3_1_1signal_1_1Filter_html_a308c504c3787f050ccb979ecc410e5b8"><div class="ttname"><a href="classisce3_1_1signal_1_1Filter.html#a308c504c3787f050ccb979ecc410e5b8">isce3::signal::Filter::constructAzimuthCommonbandFilter</a></div><div class="ttdeci">void constructAzimuthCommonbandFilter(const isce3::core::LUT1d< double > &refDoppler, const isce3::core::LUT1d< double > &secDoppler, double bandwidth, double prf, double beta, std::valarray< std::complex< T >> &signal, std::valarray< std::complex< T >> &spectrum, size_t ncols, size_t nrows)</div><div class="ttdoc">Construct azimuth common band filter. </div><div class="ttdef"><b>Definition:</b> Filter.cpp:246</div></div>
<div class="ttc" id="classisce3_1_1signal_1_1Filter_html_a67971c40ffb61d48994d247c5c212801"><div class="ttname"><a href="classisce3_1_1signal_1_1Filter.html#a67971c40ffb61d48994d247c5c212801">isce3::signal::Filter::initiateAzimuthFilter</a></div><div class="ttdeci">void initiateAzimuthFilter(std::valarray< std::complex< T >> &signal, std::valarray< std::complex< T >> &spectrum, size_t ncols, size_t nrows)</div><div class="ttdoc">constructs forward abd backward FFT plans for filtering a block of data in azimuth direction...</div><div class="ttdef"><b>Definition:</b> Filter.cpp:40</div></div>
<div class="ttc" id="classisce3_1_1signal_1_1Filter_html_ae8ea820fb61350b04ecc1f74b47e8b40"><div class="ttname"><a href="classisce3_1_1signal_1_1Filter.html#ae8ea820fb61350b04ecc1f74b47e8b40">isce3::signal::Filter::initiateRangeFilter</a></div><div class="ttdeci">void initiateRangeFilter(std::valarray< std::complex< T >> &signal, std::valarray< std::complex< T >> &spectrum, size_t ncols, size_t nrows)</div><div class="ttdoc">constructs forward abd backward FFT plans for filtering a block of data in range direction. </div><div class="ttdef"><b>Definition:</b> Filter.cpp:21</div></div>
<div class="ttc" id="classisce3_1_1signal_1_1Filter_html_a702db506cf95c7eaadfd2bd5196b3d69"><div class="ttname"><a href="classisce3_1_1signal_1_1Filter.html#a702db506cf95c7eaadfd2bd5196b3d69">isce3::signal::Filter::filter</a></div><div class="ttdeci">void filter(std::valarray< std::complex< T >> &signal, std::valarray< std::complex< T >> &spectrum)</div><div class="ttdoc">Filter a signal in frequency domain. </div><div class="ttdef"><b>Definition:</b> Filter.cpp:319</div></div>
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