| /* -*- c++ -*- */ |
| /* |
| * @file |
| * @author Piotr Krysik <ptrkrysik@gmail.com> |
| * @section LICENSE |
| * |
| * Gr-gsm 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. |
| * |
| * Gr-gsm 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 gr-gsm; see the file COPYING. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifndef INCLUDED_GSM_CONSTANTS_H |
| #define INCLUDED_GSM_CONSTANTS_H |
| |
| #define GSM_SYMBOL_RATE (1625000.0/6.0) //symbols per second |
| #define GSM_SYMBOL_PERIOD (1.0/GSM_SYMBOL_RATE) //seconds per symbol |
| |
| //Burst timing |
| #define TAIL_BITS 3 |
| #define GUARD_BITS 8 |
| #define GUARD_FRACTIONAL 0.25 //fractional part of guard period |
| #define GUARD_PERIOD GUARD_BITS + GUARD_FRACTIONAL |
| #define DATA_BITS 57 //size of 1 data block in normal burst |
| #define STEALING_BIT 1 |
| #define N_TRAIN_BITS 26 |
| #define N_SYNC_BITS 64 |
| #define USEFUL_BITS 142 //(2*(DATA_BITS+STEALING_BIT) + N_TRAIN_BITS ) |
| #define FCCH_BITS USEFUL_BITS |
| #define BURST_SIZE (USEFUL_BITS+2*TAIL_BITS) |
| #define PROCESSED_CHUNK BURST_SIZE+2*GUARD_PERIOD |
| |
| #define SCH_DATA_LEN 39 |
| #define TS_BITS (TAIL_BITS+USEFUL_BITS+TAIL_BITS+GUARD_BITS) //a full TS (156 bits) |
| #define TS_PER_FRAME 8 |
| #define FRAME_BITS (TS_PER_FRAME * TS_BITS + 2) // 156.25 * 8 |
| #define FCCH_POS TAIL_BITS |
| #define SYNC_POS 39 |
| #define TRAIN_POS ( TAIL_BITS + (DATA_BITS+STEALING_BIT) + 5) //first 5 bits of a training sequence |
| //aren't used for channel impulse response estimation |
| #define TRAIN_BEGINNING 5 |
| #define SAFETY_MARGIN 6 // |
| |
| #define FCCH_HITS_NEEDED (USEFUL_BITS - 4) |
| #define FCCH_MAX_MISSES 1 |
| #define FCCH_MAX_FREQ_OFFSET 100 |
| |
| #define CHAN_IMP_RESP_LENGTH 5 |
| |
| #define MAX_SCH_ERRORS 10 //maximum number of subsequent sch errors after which gsm receiver goes to find_next_fcch state |
| |
| typedef enum {empty, fcch_burst, sch_burst, normal_burst, rach_burst, dummy, dummy_or_normal, normal_or_noise} burst_type; |
| typedef enum {unknown, multiframe_26, multiframe_51} multiframe_type; |
| |
| static const unsigned char SYNC_BITS[] = { |
| 1, 0, 1, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0, |
| 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, |
| 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, |
| 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1 |
| }; |
| |
| const unsigned FCCH_FRAMES[] = {0, 10, 20, 30, 40}; |
| const unsigned SCH_FRAMES[] = {1, 11, 21, 31, 41}; |
| |
| const unsigned BCCH_FRAMES[] = {2, 3, 4, 5}; //!!the receiver shouldn't care about logical |
| //!!channels so this will be removed from this header |
| const unsigned TEST_CCH_FRAMES[] = {2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 22, 23, 24, 25, 26, 27, 28, 29, 32, 33, 34, 35, 36, 37, 38, 39, 42, 43, 44, 45, 46, 47, 48, 49}; |
| const unsigned TRAFFIC_CHANNEL_F[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24}; |
| const unsigned TEST51[] = {0, 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}; |
| |
| |
| #define TSC0 0 |
| #define TSC1 1 |
| #define TSC2 2 |
| #define TSC3 3 |
| #define TSC4 4 |
| #define TSC5 5 |
| #define TSC6 6 |
| #define TSC7 7 |
| #define TS_DUMMY 8 |
| |
| #define TRAIN_SEQ_NUM 9 |
| |
| #define TIMESLOT0 0 |
| #define TIMESLOT1 1 |
| #define TIMESLOT2 2 |
| #define TIMESLOT3 3 |
| #define TIMESLOT4 4 |
| #define TIMESLOT5 5 |
| #define TIMESLOT6 6 |
| #define TIMESLOT7 7 |
| |
| |
| static const unsigned char train_seq[TRAIN_SEQ_NUM][N_TRAIN_BITS] = { |
| {0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1}, |
| {0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1}, |
| {0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0}, |
| {0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0}, |
| {0, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 1, 1}, |
| {0, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 1, 0}, |
| {1, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 1}, |
| {1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0}, |
| {0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1} // DUMMY |
| }; |
| |
| |
| //Dummy burst 0xFB 76 0A 4E 09 10 1F 1C 5C 5C 57 4A 33 39 E9 F1 2F A8 |
| static const unsigned char dummy_burst[] = { |
| 0, 0, 0, |
| 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, |
| 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, |
| 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, |
| 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, |
| 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, |
| 0, 1, 1, 1, 1, 1, 0, 0, |
| |
| 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, |
| 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, |
| 0, 0, 0, 1, 0, 1, |
| |
| 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, |
| 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, |
| 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, |
| 1, 0, 1, 0, 0, 1, 1, 1, 1, 1, |
| 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, |
| 1, 1, 1, 0, 1, 0, 1, 0, |
| 0, 0, 0 |
| }; |
| |
| |
| /* |
| * The frequency correction burst is used for frequency synchronization |
| * of the mobile. This is broadcast in TS0 together with the SCH and |
| * BCCH. |
| * |
| * Modulating the bits below causes a spike at 62.5kHz above (below for |
| * COMPACT) the center frequency. One can use this spike with a narrow |
| * band filter to accurately determine the center of the channel. |
| */ |
| static const unsigned char fc_fb[] = { |
| 0, 0, 0, //I don't use this tables, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //I copied this here from burst_types.h because |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //the description is very informative - p.krysik |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0 |
| }; |
| |
| static const unsigned char fc_compact_fb[] = { |
| 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, |
| 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, |
| 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, |
| 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, |
| 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, |
| 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, |
| 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, |
| 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, |
| 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0 |
| }; |
| |
| |
| #endif /* INCLUDED_GSM_CONSTANTS_H */ |