GNU Radio's IEEE802 Package
multiuser_chirp_detector_cc_impl.h
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1/* -*- c++ -*- */
2/*
3 * Copyright 2015 Felix Wunsch, Communications Engineering Lab (CEL) / Karlsruhe Institute of Technology (KIT) <wunsch.felix@googlemail.com>.
4 *
5 * This is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 3, or (at your option)
8 * any later version.
9 *
10 * This software is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this software; see the file COPYING. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street,
18 * Boston, MA 02110-1301, USA.
19 */
20
21#ifndef INCLUDED_IEEE802_15_4_MULTIUSER_CHIRP_DETECTOR_CC_IMPL_H
22#define INCLUDED_IEEE802_15_4_MULTIUSER_CHIRP_DETECTOR_CC_IMPL_H
23
25
26namespace gr {
27 namespace ieee802_15_4 {
28
30 {
31 private:
32 std::vector<gr_complex> d_chirp_seq;
33 int d_time_gap_1;
34 int d_time_gap_2;
35 int d_len_subchirp;
36 float d_threshold;
37 static const int STATE_SEARCH = 0;
38 static const int STATE_TRACKING = 1;
39 static const int NUM_SUBCHIRPS = 4;
40 int d_state;
41 int d_chirp_ctr;
42 int d_subchirp_ctr;
43 gr_complex d_e_subchirp; // actually is a float, but needs to be complex for the / operator to be defined
44 void reset();
45 gr_complex correlate_current_subchirp(const gr_complex* buf); // normalized correlation
46 bool corr_over_threshold(gr_complex corrval);
47 int dist_to_next_subchirp();
48 int required_input_items(); // FIXME: does not take the current position in the chirp into account
49
50 public:
51 #define dout false && std::cout // turn false to true to enable debug output
52
53 multiuser_chirp_detector_cc_impl(std::vector<gr_complex> chirp_seq, int time_gap_1, int time_gap_2, int len_subchirp, float threshold);
55
56 // Where all the action really happens
57 void forecast (int noutput_items, gr_vector_int &ninput_items_required);
58
59 int general_work(int noutput_items,
60 gr_vector_int &ninput_items,
61 gr_vector_const_void_star &input_items,
62 gr_vector_void_star &output_items);
63 };
64
65 } // namespace ieee802_15_4
66} // namespace gr
67
68#endif /* INCLUDED_IEEE802_15_4_MULTIUSER_CHIRP_DETECTOR_CC_IMPL_H */
69
Definition multiuser_chirp_detector_cc_impl.h:30
multiuser_chirp_detector_cc_impl(std::vector< gr_complex > chirp_seq, int time_gap_1, int time_gap_2, int len_subchirp, float threshold)
int general_work(int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
void forecast(int noutput_items, gr_vector_int &ninput_items_required)
<+description of block+>
Definition multiuser_chirp_detector_cc.h:37
Definition access_code_prefixer.h:23