gr-baz Package
hilbert_fc.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2004,2012 Free Software Foundation, Inc.
4  *
5  * This file is part of GNU Radio
6  *
7  * GNU Radio is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 3, or (at your option)
10  * any later version.
11  *
12  * GNU Radio is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with GNU Radio; see the file COPYING. If not, write to
19  * the Free Software Foundation, Inc., 51 Franklin Street,
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21  */
22 
23 #ifndef INCLUDED_FILTER_HILBERT_FC_H
24 #define INCLUDED_FILTER_HILBERT_FC_H
25 
26 #include <filter/api.h>
27 #include <gr_sync_block.h>
28 #include <gr_types.h>
29 
30 namespace gr {
31  namespace filter {
32 
33  class FILTER_API hilbert_fc : virtual public gr_sync_block
34  {
35  public:
36  // gr::filter::hilbert_fc::sptr
38 
39  /*!
40  * \brief Hilbert transformer.
41  * \ingroup filter_blk
42  *
43  * real output is input appropriately delayed.
44  * imaginary output is hilbert filtered (90 degree phase shift)
45  * version of input.
46  */
47  static sptr make(unsigned int ntaps);
48  };
49 
50  } /* namespace filter */
51 } /* namespace gr */
52 
53 #endif /* INCLUDED_FILTER_HILBERT_FC_H */