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<div class="title">gr::filter::firdes Class Reference<div class="ingroups"><a class="el" href="group__filter__design.html">Digital Filter Design</a></div></div> </div>
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<p>Finite Impulse Response (FIR) filter design functions.
<a href="classgr_1_1filter_1_1firdes.html#details">More...</a></p>
<p><code>#include <<a class="el" href="firdes_8h_source.html">firdes.h</a>></code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-types"></a>
Public Types</h2></td></tr>
<tr class="memitem:a5527e5ee7713055268448c55b1b235a9"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> { <br/>
  <a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a> = 0,
<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a082fccca16caae201f2da9fc2531a827">WIN_HANN</a> = 1,
<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9aada50ccfbac560bf7f9e2f469db6ed5a">WIN_BLACKMAN</a> = 2,
<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a26810a2831833c94347ad7d1e978c1c5">WIN_RECTANGULAR</a> = 3,
<br/>
  <a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a81c930d6a1b64486c9321fe64e27d4ce">WIN_KAISER</a> = 4,
<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9ac79ce2faa8899fdc01091c3791c5e0d8">WIN_BLACKMAN_hARRIS</a> = 5,
<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9ac9864fa124129bc08fdd6f514eb657f9">WIN_BLACKMAN_HARRIS</a> = 5
<br/>
}</td></tr>
<tr class="separator:a5527e5ee7713055268448c55b1b235a9"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a>
Static Public Member Functions</h2></td></tr>
<tr class="memitem:a772eb5c542093d65518a6d721483aace"><td class="memItemLeft" align="right" valign="top">static std::vector< float > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr_1_1filter_1_1firdes.html#a772eb5c542093d65518a6d721483aace">low_pass</a> (double gain, double sampling_freq, double cutoff_freq, double transition_width, <a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> <a class="el" href="classgr_1_1filter_1_1firdes.html#a6712ee374caa81f322c3d44184a04412">window</a>=<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a>, double beta=6.76)</td></tr>
<tr class="memdesc:a772eb5c542093d65518a6d721483aace"><td class="mdescLeft"> </td><td class="mdescRight">use "window method" to design a low-pass FIR filter <a href="#a772eb5c542093d65518a6d721483aace"></a><br/></td></tr>
<tr class="separator:a772eb5c542093d65518a6d721483aace"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a57c2a9eb8dc61d3740d9eb0e02ebb880"><td class="memItemLeft" align="right" valign="top">static std::vector< float > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr_1_1filter_1_1firdes.html#a57c2a9eb8dc61d3740d9eb0e02ebb880">low_pass_2</a> (double gain, double sampling_freq, double cutoff_freq, double transition_width, double attenuation_dB, <a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> <a class="el" href="classgr_1_1filter_1_1firdes.html#a6712ee374caa81f322c3d44184a04412">window</a>=<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a>, double beta=6.76)</td></tr>
<tr class="memdesc:a57c2a9eb8dc61d3740d9eb0e02ebb880"><td class="mdescLeft"> </td><td class="mdescRight">use "window method" to design a low-pass FIR filter <a href="#a57c2a9eb8dc61d3740d9eb0e02ebb880"></a><br/></td></tr>
<tr class="separator:a57c2a9eb8dc61d3740d9eb0e02ebb880"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a2fd3bb98d7eb35da3ef2440a8ee1224c"><td class="memItemLeft" align="right" valign="top">static std::vector< float > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr_1_1filter_1_1firdes.html#a2fd3bb98d7eb35da3ef2440a8ee1224c">high_pass</a> (double gain, double sampling_freq, double cutoff_freq, double transition_width, <a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> <a class="el" href="classgr_1_1filter_1_1firdes.html#a6712ee374caa81f322c3d44184a04412">window</a>=<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a>, double beta=6.76)</td></tr>
<tr class="memdesc:a2fd3bb98d7eb35da3ef2440a8ee1224c"><td class="mdescLeft"> </td><td class="mdescRight">use "window method" to design a high-pass FIR filter <a href="#a2fd3bb98d7eb35da3ef2440a8ee1224c"></a><br/></td></tr>
<tr class="separator:a2fd3bb98d7eb35da3ef2440a8ee1224c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:afc22d9fb67312a346a365f019aa5e0b5"><td class="memItemLeft" align="right" valign="top">static std::vector< float > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr_1_1filter_1_1firdes.html#afc22d9fb67312a346a365f019aa5e0b5">high_pass_2</a> (double gain, double sampling_freq, double cutoff_freq, double transition_width, double attenuation_dB, <a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> <a class="el" href="classgr_1_1filter_1_1firdes.html#a6712ee374caa81f322c3d44184a04412">window</a>=<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a>, double beta=6.76)</td></tr>
<tr class="memdesc:afc22d9fb67312a346a365f019aa5e0b5"><td class="mdescLeft"> </td><td class="mdescRight">use "window method" to design a high-pass FIR filter <a href="#afc22d9fb67312a346a365f019aa5e0b5"></a><br/></td></tr>
<tr class="separator:afc22d9fb67312a346a365f019aa5e0b5"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5a308a91ca9996feeda97197827a945e"><td class="memItemLeft" align="right" valign="top">static std::vector< float > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr_1_1filter_1_1firdes.html#a5a308a91ca9996feeda97197827a945e">band_pass</a> (double gain, double sampling_freq, double low_cutoff_freq, double high_cutoff_freq, double transition_width, <a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> <a class="el" href="classgr_1_1filter_1_1firdes.html#a6712ee374caa81f322c3d44184a04412">window</a>=<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a>, double beta=6.76)</td></tr>
<tr class="memdesc:a5a308a91ca9996feeda97197827a945e"><td class="mdescLeft"> </td><td class="mdescRight">use "window method" to design a band-pass FIR filter <a href="#a5a308a91ca9996feeda97197827a945e"></a><br/></td></tr>
<tr class="separator:a5a308a91ca9996feeda97197827a945e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ace8a7353054bd70e6e9a3d8dbbb1ef47"><td class="memItemLeft" align="right" valign="top">static std::vector< float > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr_1_1filter_1_1firdes.html#ace8a7353054bd70e6e9a3d8dbbb1ef47">band_pass_2</a> (double gain, double sampling_freq, double low_cutoff_freq, double high_cutoff_freq, double transition_width, double attenuation_dB, <a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> <a class="el" href="classgr_1_1filter_1_1firdes.html#a6712ee374caa81f322c3d44184a04412">window</a>=<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a>, double beta=6.76)</td></tr>
<tr class="memdesc:ace8a7353054bd70e6e9a3d8dbbb1ef47"><td class="mdescLeft"> </td><td class="mdescRight">use "window method" to design a band-pass FIR filter <a href="#ace8a7353054bd70e6e9a3d8dbbb1ef47"></a><br/></td></tr>
<tr class="separator:ace8a7353054bd70e6e9a3d8dbbb1ef47"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad7c0d09d28ed74682a5189341b109f39"><td class="memItemLeft" align="right" valign="top">static std::vector< <a class="el" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr_1_1filter_1_1firdes.html#ad7c0d09d28ed74682a5189341b109f39">complex_band_pass</a> (double gain, double sampling_freq, double low_cutoff_freq, double high_cutoff_freq, double transition_width, <a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> <a class="el" href="classgr_1_1filter_1_1firdes.html#a6712ee374caa81f322c3d44184a04412">window</a>=<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a>, double beta=6.76)</td></tr>
<tr class="memdesc:ad7c0d09d28ed74682a5189341b109f39"><td class="mdescLeft"> </td><td class="mdescRight">use "window method" to design a complex band-pass FIR filter <a href="#ad7c0d09d28ed74682a5189341b109f39"></a><br/></td></tr>
<tr class="separator:ad7c0d09d28ed74682a5189341b109f39"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ae0006277ebff2441ab1c229fa122c99e"><td class="memItemLeft" align="right" valign="top">static std::vector< <a class="el" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr_1_1filter_1_1firdes.html#ae0006277ebff2441ab1c229fa122c99e">complex_band_pass_2</a> (double gain, double sampling_freq, double low_cutoff_freq, double high_cutoff_freq, double transition_width, double attenuation_dB, <a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> <a class="el" href="classgr_1_1filter_1_1firdes.html#a6712ee374caa81f322c3d44184a04412">window</a>=<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a>, double beta=6.76)</td></tr>
<tr class="memdesc:ae0006277ebff2441ab1c229fa122c99e"><td class="mdescLeft"> </td><td class="mdescRight">use "window method" to design a complex band-pass FIR filter <a href="#ae0006277ebff2441ab1c229fa122c99e"></a><br/></td></tr>
<tr class="separator:ae0006277ebff2441ab1c229fa122c99e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab9da311b1d7dc7875c62efd699a3a043"><td class="memItemLeft" align="right" valign="top">static std::vector< float > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr_1_1filter_1_1firdes.html#ab9da311b1d7dc7875c62efd699a3a043">band_reject</a> (double gain, double sampling_freq, double low_cutoff_freq, double high_cutoff_freq, double transition_width, <a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> <a class="el" href="classgr_1_1filter_1_1firdes.html#a6712ee374caa81f322c3d44184a04412">window</a>=<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a>, double beta=6.76)</td></tr>
<tr class="memdesc:ab9da311b1d7dc7875c62efd699a3a043"><td class="mdescLeft"> </td><td class="mdescRight">use "window method" to design a band-reject FIR filter <a href="#ab9da311b1d7dc7875c62efd699a3a043"></a><br/></td></tr>
<tr class="separator:ab9da311b1d7dc7875c62efd699a3a043"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad71a4ba22a8401a2ac3f03d0f7b0d3a3"><td class="memItemLeft" align="right" valign="top">static std::vector< float > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr_1_1filter_1_1firdes.html#ad71a4ba22a8401a2ac3f03d0f7b0d3a3">band_reject_2</a> (double gain, double sampling_freq, double low_cutoff_freq, double high_cutoff_freq, double transition_width, double attenuation_dB, <a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> <a class="el" href="classgr_1_1filter_1_1firdes.html#a6712ee374caa81f322c3d44184a04412">window</a>=<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a>, double beta=6.76)</td></tr>
<tr class="memdesc:ad71a4ba22a8401a2ac3f03d0f7b0d3a3"><td class="mdescLeft"> </td><td class="mdescRight">use "window method" to design a band-reject FIR filter <a href="#ad71a4ba22a8401a2ac3f03d0f7b0d3a3"></a><br/></td></tr>
<tr class="separator:ad71a4ba22a8401a2ac3f03d0f7b0d3a3"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:afa8d6f36cca0b14c8d16b4e927a13d2b"><td class="memItemLeft" align="right" valign="top">static std::vector< float > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr_1_1filter_1_1firdes.html#afa8d6f36cca0b14c8d16b4e927a13d2b">hilbert</a> (unsigned int ntaps=19, <a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> windowtype=<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a26810a2831833c94347ad7d1e978c1c5">WIN_RECTANGULAR</a>, double beta=6.76)</td></tr>
<tr class="memdesc:afa8d6f36cca0b14c8d16b4e927a13d2b"><td class="mdescLeft"> </td><td class="mdescRight">design a Hilbert Transform Filter <a href="#afa8d6f36cca0b14c8d16b4e927a13d2b"></a><br/></td></tr>
<tr class="separator:afa8d6f36cca0b14c8d16b4e927a13d2b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af37a0f8f92f1e0440033ccdb118df990"><td class="memItemLeft" align="right" valign="top">static std::vector< float > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr_1_1filter_1_1firdes.html#af37a0f8f92f1e0440033ccdb118df990">root_raised_cosine</a> (double gain, double sampling_freq, double symbol_rate, double alpha, int ntaps)</td></tr>
<tr class="memdesc:af37a0f8f92f1e0440033ccdb118df990"><td class="mdescLeft"> </td><td class="mdescRight">design a Root Cosine FIR Filter (do we need a window?) <a href="#af37a0f8f92f1e0440033ccdb118df990"></a><br/></td></tr>
<tr class="separator:af37a0f8f92f1e0440033ccdb118df990"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa851ebbcb1f36c54f1db27149f487ee4"><td class="memItemLeft" align="right" valign="top">static std::vector< float > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr_1_1filter_1_1firdes.html#aa851ebbcb1f36c54f1db27149f487ee4">gaussian</a> (double gain, double spb, double bt, int ntaps)</td></tr>
<tr class="memdesc:aa851ebbcb1f36c54f1db27149f487ee4"><td class="mdescLeft"> </td><td class="mdescRight">design a Gaussian filter <a href="#aa851ebbcb1f36c54f1db27149f487ee4"></a><br/></td></tr>
<tr class="separator:aa851ebbcb1f36c54f1db27149f487ee4"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a6712ee374caa81f322c3d44184a04412"><td class="memItemLeft" align="right" valign="top">static std::vector< float > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr_1_1filter_1_1firdes.html#a6712ee374caa81f322c3d44184a04412">window</a> (<a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> type, int ntaps, double beta)</td></tr>
<tr class="separator:a6712ee374caa81f322c3d44184a04412"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Finite Impulse Response (FIR) filter design functions. </p>
</div><h2 class="groupheader">Member Enumeration Documentation</h2>
<a class="anchor" id="a5527e5ee7713055268448c55b1b235a9"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">enum <a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">gr::filter::firdes::win_type</a></td>
</tr>
</table>
</div><div class="memdoc">
<table class="fieldtable">
<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><em><a class="anchor" id="a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95"></a>WIN_HAMMING</em> </td><td class="fielddoc">
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="a5527e5ee7713055268448c55b1b235a9a082fccca16caae201f2da9fc2531a827"></a>WIN_HANN</em> </td><td class="fielddoc">
</td></tr>
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<tr><td class="fieldname"><em><a class="anchor" id="a5527e5ee7713055268448c55b1b235a9a81c930d6a1b64486c9321fe64e27d4ce"></a>WIN_KAISER</em> </td><td class="fielddoc">
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<h2 class="groupheader">Member Function Documentation</h2>
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<td class="memname">static std::vector<float> gr::filter::firdes::band_pass </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>gain</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>sampling_freq</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>low_cutoff_freq</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>high_cutoff_freq</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>transition_width</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> </td>
<td class="paramname"><em>window</em> = <code><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a></code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>beta</em> = <code>6.76</code> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<span class="mlabels"><span class="mlabel">static</span></span> </td>
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<p>use "window method" to design a band-pass FIR filter </p>
<p><code>gain:</code> overall gain of filter (typically 1.0) <code>sampling_freq:</code> sampling freq (Hz) <code>low_cutoff_freq:</code> center of transition band (Hz) <code>high_cutoff_freq:</code> center of transition band (Hz) <code>transition_width:</code> width of transition band (Hz). The normalized width of the transition band is what sets the number of taps required. Narrow –> more taps <code>window_type:</code> What kind of window to use. Determines maximum attenuation and passband ripple. <code>beta:</code> parameter for Kaiser window </p>
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<td class="memname">static std::vector<float> gr::filter::firdes::band_pass_2 </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>gain</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>sampling_freq</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>low_cutoff_freq</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>high_cutoff_freq</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>transition_width</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>attenuation_dB</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> </td>
<td class="paramname"><em>window</em> = <code><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a></code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>beta</em> = <code>6.76</code> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">static</span></span> </td>
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<p>use "window method" to design a band-pass FIR filter </p>
<p><code>gain:</code> overall gain of filter (typically 1.0) <code>sampling_freq:</code> sampling freq (Hz) <code>low_cutoff_freq:</code> center of transition band (Hz) <code>high_cutoff_freq:</code> center of transition band (Hz) <code>transition_width:</code> width of transition band (Hz). <code>attenuation_dB</code> out of band attenuation The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow –> more taps More attenuation –> more taps <code>window_type:</code> What kind of window to use. Determines maximum attenuation and passband ripple. <code>beta:</code> parameter for Kaiser window </p>
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<td class="memname">static std::vector<float> gr::filter::firdes::band_reject </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>gain</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>sampling_freq</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>low_cutoff_freq</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>high_cutoff_freq</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>transition_width</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> </td>
<td class="paramname"><em>window</em> = <code><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a></code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>beta</em> = <code>6.76</code> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">static</span></span> </td>
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<p>use "window method" to design a band-reject FIR filter </p>
<p><code>gain:</code> overall gain of filter (typically 1.0) <code>sampling_freq:</code> sampling freq (Hz) <code>low_cutoff_freq:</code> center of transition band (Hz) <code>high_cutoff_freq:</code> center of transition band (Hz) <code>transition_width:</code> width of transition band (Hz). The normalized width of the transition band is what sets the number of taps required. Narrow –> more taps <code>window_type:</code> What kind of window to use. Determines maximum attenuation and passband ripple. <code>beta:</code> parameter for Kaiser window </p>
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<a class="anchor" id="ad71a4ba22a8401a2ac3f03d0f7b0d3a3"></a>
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<td class="memname">static std::vector<float> gr::filter::firdes::band_reject_2 </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>gain</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>sampling_freq</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>low_cutoff_freq</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>high_cutoff_freq</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>transition_width</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>attenuation_dB</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> </td>
<td class="paramname"><em>window</em> = <code><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a></code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>beta</em> = <code>6.76</code> </td>
</tr>
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<td></td>
<td>)</td>
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</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">static</span></span> </td>
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</div><div class="memdoc">
<p>use "window method" to design a band-reject FIR filter </p>
<p><code>gain:</code> overall gain of filter (typically 1.0) <code>sampling_freq:</code> sampling freq (Hz) <code>low_cutoff_freq:</code> center of transition band (Hz) <code>high_cutoff_freq:</code> center of transition band (Hz) <code>transition_width:</code> width of transition band (Hz). <code>attenuation_dB</code> out of band attenuation The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow –> more taps More attenuation –> more taps <code>window_type:</code> What kind of window to use. Determines maximum attenuation and passband ripple. <code>beta:</code> parameter for Kaiser window </p>
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<td class="memname">static std::vector<<a class="el" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a>> gr::filter::firdes::complex_band_pass </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>gain</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>sampling_freq</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>low_cutoff_freq</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>high_cutoff_freq</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>transition_width</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> </td>
<td class="paramname"><em>window</em> = <code><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a></code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>beta</em> = <code>6.76</code> </td>
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<td></td>
<td>)</td>
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<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">static</span></span> </td>
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</div><div class="memdoc">
<p>use "window method" to design a complex band-pass FIR filter </p>
<p><code>gain:</code> overall gain of filter (typically 1.0) <code>sampling_freq:</code> sampling freq (Hz) <code>low_cutoff_freq:</code> center of transition band (Hz) <code>high_cutoff_freq:</code> center of transition band (Hz) <code>transition_width:</code> width of transition band (Hz). The normalized width of the transition band is what sets the number of taps required. Narrow –> more taps <code>window_type:</code> What kind of window to use. Determines maximum attenuation and passband ripple. <code>beta:</code> parameter for Kaiser window </p>
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<td class="memname">static std::vector<<a class="el" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a>> gr::filter::firdes::complex_band_pass_2 </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>gain</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>sampling_freq</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>low_cutoff_freq</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>high_cutoff_freq</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>transition_width</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>attenuation_dB</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> </td>
<td class="paramname"><em>window</em> = <code><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a></code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>beta</em> = <code>6.76</code> </td>
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<td></td>
<td>)</td>
<td></td><td></td>
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<span class="mlabels"><span class="mlabel">static</span></span> </td>
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<p>use "window method" to design a complex band-pass FIR filter </p>
<p><code>gain:</code> overall gain of filter (typically 1.0) <code>sampling_freq:</code> sampling freq (Hz) <code>low_cutoff_freq:</code> center of transition band (Hz) <code>high_cutoff_freq:</code> center of transition band (Hz) <code>transition_width:</code> width of transition band (Hz). <code>attenuation_dB</code> out of band attenuation The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow –> more taps More attenuation –> more taps <code>window_type:</code> What kind of window to use. Determines maximum attenuation and passband ripple. <code>beta:</code> parameter for Kaiser window </p>
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<td class="memname">static std::vector<float> gr::filter::firdes::gaussian </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>gain</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>spb</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>bt</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>ntaps</em> </td>
</tr>
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<td>)</td>
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<p>design a Gaussian filter </p>
<p><code>gain:</code> overall gain of filter (typically 1.0) <code>symbols</code> per bit: symbol rate, must be a factor of sample rate <code>ntaps:</code> number of taps </p>
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<td class="memname">static std::vector<float> gr::filter::firdes::high_pass </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>gain</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>sampling_freq</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>cutoff_freq</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>transition_width</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> </td>
<td class="paramname"><em>window</em> = <code><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a></code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>beta</em> = <code>6.76</code> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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</table>
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<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">static</span></span> </td>
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<p>use "window method" to design a high-pass FIR filter </p>
<p><code>gain:</code> overall gain of filter (typically 1.0) <code>sampling_freq:</code> sampling freq (Hz) <code>cutoff_freq:</code> center of transition band (Hz) <code>transition_width:</code> width of transition band (Hz). The normalized width of the transition band is what sets the number of taps required. Narrow –> more taps <code>window_type:</code> What kind of window to use. Determines maximum attenuation and passband ripple. <code>beta:</code> parameter for Kaiser window </p>
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<a class="anchor" id="afc22d9fb67312a346a365f019aa5e0b5"></a>
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<td class="memname">static std::vector<float> gr::filter::firdes::high_pass_2 </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>gain</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>sampling_freq</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>cutoff_freq</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>transition_width</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>attenuation_dB</em>, </td>
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<td class="paramtype"><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> </td>
<td class="paramname"><em>window</em> = <code><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a></code>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>beta</em> = <code>6.76</code> </td>
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<p>use "window method" to design a high-pass FIR filter </p>
<p><code>gain:</code> overall gain of filter (typically 1.0) <code>sampling_freq:</code> sampling freq (Hz) <code>cutoff_freq:</code> center of transition band (Hz) <code>transition_width:</code> width of transition band (Hz). <code>attenuation_dB</code> out of band attenuation The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow –> more taps More attenuation –> more taps <code>window_type:</code> What kind of window to use. Determines maximum attenuation and passband ripple. <code>beta:</code> parameter for Kaiser window </p>
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<td class="memname">static std::vector<float> gr::filter::firdes::hilbert </td>
<td>(</td>
<td class="paramtype">unsigned int </td>
<td class="paramname"><em>ntaps</em> = <code>19</code>, </td>
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<td class="paramtype"><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> </td>
<td class="paramname"><em>windowtype</em> = <code><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a26810a2831833c94347ad7d1e978c1c5">WIN_RECTANGULAR</a></code>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">double </td>
<td class="paramname"><em>beta</em> = <code>6.76</code> </td>
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<p>design a Hilbert Transform Filter </p>
<p><code>ntaps:</code> Number of taps, must be odd <code>window_type:</code> What kind of window to use <code>beta:</code> Only used for Kaiser </p>
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<td class="memname">static std::vector<float> gr::filter::firdes::low_pass </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>gain</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>sampling_freq</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>cutoff_freq</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>transition_width</em>, </td>
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<td class="paramtype"><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> </td>
<td class="paramname"><em>window</em> = <code><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a></code>, </td>
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<td class="paramname"><em>beta</em> = <code>6.76</code> </td>
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<p>use "window method" to design a low-pass FIR filter </p>
<p><code>gain:</code> overall gain of filter (typically 1.0) <code>sampling_freq:</code> sampling freq (Hz) <code>cutoff_freq:</code> center of transition band (Hz) <code>transition_width:</code> width of transition band (Hz). The normalized width of the transition band is what sets the number of taps required. Narrow –> more taps <code>window_type:</code> What kind of window to use. Determines maximum attenuation and passband ripple. <code>beta:</code> parameter for Kaiser window </p>
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<td class="memname">static std::vector<float> gr::filter::firdes::low_pass_2 </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>gain</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>sampling_freq</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>cutoff_freq</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>transition_width</em>, </td>
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<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>attenuation_dB</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype"><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> </td>
<td class="paramname"><em>window</em> = <code><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9a8ecd24e72826deef18f376646ad3ec95">WIN_HAMMING</a></code>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>beta</em> = <code>6.76</code> </td>
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<p>use "window method" to design a low-pass FIR filter </p>
<p><code>gain:</code> overall gain of filter (typically 1.0) <code>sampling_freq:</code> sampling freq (Hz) <code>cutoff_freq:</code> center of transition band (Hz) <code>transition_width:</code> width of transition band (Hz). <code>attenuation_dB</code> required stopband attenuation The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow –> more taps More attenuatin –> more taps <code>window_type:</code> What kind of window to use. Determines maximum attenuation and passband ripple. <code>beta:</code> parameter for Kaiser window </p>
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<td class="memname">static std::vector<float> gr::filter::firdes::root_raised_cosine </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>gain</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">double </td>
<td class="paramname"><em>sampling_freq</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>symbol_rate</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>alpha</em>, </td>
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<td class="paramtype">int </td>
<td class="paramname"><em>ntaps</em> </td>
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<p>design a Root Cosine FIR Filter (do we need a window?) </p>
<p><code>gain:</code> overall gain of filter (typically 1.0) <code>sampling_freq:</code> sampling freq (Hz) <code>symbol</code> rate: symbol rate, must be a factor of sample rate <code>alpha:</code> excess bandwidth factor <code>ntaps:</code> number of taps </p>
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<td class="memname">static std::vector<float> gr::filter::firdes::window </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classgr_1_1filter_1_1firdes.html#a5527e5ee7713055268448c55b1b235a9">win_type</a> </td>
<td class="paramname"><em>type</em>, </td>
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<td class="paramtype">int </td>
<td class="paramname"><em>ntaps</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>beta</em> </td>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="firdes_8h_source.html">firdes.h</a></li>
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