1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
/* -*- c++ -*- */
/*
* @file
* @author Piotr Krysik <pkrysik@stud.elka.pw.edu.pl>
* @section LICENSE
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*
* @section DESCRIPTION
* This file contains classes which define gsm_receiver configuration
* and the burst_counter which is used to store internal state of the receiver
* when it's synchronized
*/
#ifndef INCLUDED_GSM_RECEIVER_CONFIG_H
#define INCLUDED_GSM_RECEIVER_CONFIG_H
#include <vector>
#include <algorithm>
#include <math.h>
#include <stdint.h>
#include <gsm_constants.h>
class multiframe_configuration
{
private:
multiframe_type d_type;
std::vector<burst_type> d_burst_types;
public:
multiframe_configuration() {
d_type = unknown;
fill(d_burst_types.begin(), d_burst_types.end(), empty);
}
~multiframe_configuration() {}
void set_type(multiframe_type type) {
if (type == multiframe_26) {
d_burst_types.resize(26);
} else {
d_burst_types.resize(51);
}
d_type = type;
}
void set_burst_type(int nr, burst_type type) {
d_burst_types[nr] = type;
}
multiframe_type get_type() {
return d_type;
}
burst_type get_burst_type(int nr) {
return d_burst_types[nr];
}
};
class burst_counter
{
private:
const int d_OSR;
uint32_t d_t1, d_t2, d_t3, d_timeslot_nr;
double d_offset_fractional;
double d_offset_integer;
public:
burst_counter(int osr):
d_OSR(osr),
d_t1(0),
d_t2(0),
d_t3(0),
d_timeslot_nr(0),
d_offset_fractional(0.0),
d_offset_integer(0.0) {
}
burst_counter(int osr, uint32_t t1, uint32_t t2, uint32_t t3, uint32_t timeslot_nr):
d_OSR(osr),
d_t1(t1),
d_t2(t2),
d_t3(t3),
d_timeslot_nr(timeslot_nr),
d_offset_fractional(0.0),
d_offset_integer(0.0) {
double first_sample_position = (get_frame_nr() * 8 + timeslot_nr) * TS_BITS;
d_offset_integer = floor(first_sample_position);
d_offset_fractional = first_sample_position - floor(first_sample_position);
}
burst_counter & operator++(int);
void set(uint32_t t1, uint32_t t2, uint32_t t3, uint32_t timeslot_nr);
uint32_t get_t1() {
return d_t1;
}
uint32_t get_t2() {
return d_t2;
}
uint32_t get_t3() {
return d_t3;
}
uint32_t get_timeslot_nr() {
return d_timeslot_nr;
}
uint32_t get_frame_nr() {
return (51 * 26 * d_t1) + (51 * (((d_t3 + 26) - d_t2) % 26)) + d_t3;
}
uint32_t get_frame_nr_mod() {
return (d_t1 << 11) + (d_t3 << 5) + d_t2;
}
unsigned get_offset() {
return (unsigned)d_offset_integer;
}
};
class channel_configuration
{
private:
multiframe_configuration d_timeslots_descriptions[TS_PER_FRAME];
public:
channel_configuration() {
for (int i = 0; i < TS_PER_FRAME; i++) {
d_timeslots_descriptions[i].set_type(unknown);
}
}
void set_multiframe_type(int timeslot_nr, multiframe_type type) {
d_timeslots_descriptions[timeslot_nr].set_type(type);
}
void set_burst_types(int timeslot_nr, const unsigned mapping[], unsigned mapping_size, burst_type b_type) {
unsigned i;
for (i = 0; i < mapping_size; i++) {
d_timeslots_descriptions[timeslot_nr].set_burst_type(mapping[i], b_type);
}
}
void set_single_burst_type(int timeslot_nr, int burst_nr, burst_type b_type) {
d_timeslots_descriptions[timeslot_nr].set_burst_type(burst_nr, b_type);
}
burst_type get_burst_type(burst_counter burst_nr);
};
#endif /* INCLUDED_GSM_RECEIVER_CONFIG_H */
|
