1 /* -*- c++ -*- */
2 /*
3  * Copyright 2011,2012 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,
20  * Boston, MA 02110-1301, USA.
21  */
22 
23 #ifndef INCLUDED_DIGITAL_MPSK_SNR_EST_CC_IMPL_H
24 #define INCLUDED_DIGITAL_MPSK_SNR_EST_CC_IMPL_H
25 
26 #include <gnuradio/digital/api.h>
27 #include <gnuradio/digital/mpsk_snr_est_cc.h>
28 #include <gnuradio/sync_block.h>
29 
30 namespace gr {
31 namespace digital {
32 
33 class mpsk_snr_est_cc_impl : public mpsk_snr_est_cc
34 {
35 private:
36     snr_est_type_t d_type;
37     int d_nsamples, d_count;
38     double d_alpha;
39     mpsk_snr_est* d_snr_est;
40 
41     // d_key is the tag name, 'snr', d_me is the block name + unique ID
42     pmt::pmt_t d_key, d_me;
43 
44 public:
45     mpsk_snr_est_cc_impl(snr_est_type_t type,
46                          int tag_nsamples = 10000,
47                          double alpha = 0.001);
48     ~mpsk_snr_est_cc_impl();
49 
50     int work(int noutput_items,
51              gr_vector_const_void_star& input_items,
52              gr_vector_void_star& output_items);
53 
54     //! Return the estimated signal-to-noise ratio in decibels
55     double snr();
56 
57     //! Return the type of estimator in use
58     snr_est_type_t type() const;
59 
60     //! Return how many samples between SNR tags
61     int tag_nsample() const;
62 
63     //! Get the running-average coefficient
64     double alpha() const;
65 
66     //! Set type of estimator to use
67     void set_type(snr_est_type_t t);
68 
69     //! Set the number of samples between SNR tags
70     void set_tag_nsample(int n);
71 
72     //! Set the running-average coefficient
73     void set_alpha(double alpha);
74 };
75 
76 } /* namespace digital */
77 } /* namespace gr */
78 
79 #endif /* INCLUDED_DIGITAL_MPSK_SNR_EST_CC_IMPL_H */
80