GNU Radio Manual and C++ API Reference  3.7.9.2
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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
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10  * any later version.
11  *
12  * GNU Radio is distributed in the hope that it will be useful,
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15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
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22 
23 #ifndef INCLUDED_FILTER_HILBERT_FC_H
24 #define INCLUDED_FILTER_HILBERT_FC_H
25 
26 #include <gnuradio/filter/api.h>
27 #include <gnuradio/filter/firdes.h>
28 #include <gnuradio/sync_block.h>
29 #include <gnuradio/types.h>
30 
31 namespace gr {
32  namespace filter {
33 
34  /*!
35  * \brief Hilbert transformer.
36  * \ingroup filter_blk
37  *
38  * \details
39  * real output is input appropriately delayed.
40  * imaginary output is hilbert filtered (90 degree phase shift)
41  * version of input.
42  */
43  class FILTER_API hilbert_fc : virtual public sync_block
44  {
45  public:
46  // gr::filter::hilbert_fc::sptr
47  typedef boost::shared_ptr<hilbert_fc> sptr;
48 
49  /*!
50  * Build a Hilbert transformer filter block.
51  *
52  * \param ntaps The number of taps for the filter.
53  * \param window Window type (see firdes::win_type) to use.
54  * \param beta Beta value for a Kaiser window.
55  */
56  static sptr make(unsigned int ntaps,
58  double beta=6.76);
59  };
60 
61  } /* namespace filter */
62 } /* namespace gr */
63 
64 #endif /* INCLUDED_FILTER_HILBERT_FC_H */
Include this header to use the message passing features.
Definition: logger.h:131
synchronous 1:1 input to output with historyOverride work to provide the signal processing implementa...
Definition: sync_block.h:37
Hamming window; max attenuation 53 dB.
Definition: firdes.h:47
win_type
Definition: firdes.h:45
Hilbert transformer.
Definition: hilbert_fc.h:43
boost::shared_ptr< hilbert_fc > sptr
Definition: hilbert_fc.h:47
#define FILTER_API
Definition: gr-filter/include/gnuradio/filter/api.h:30