122 lines
4.6 KiB
C++
122 lines
4.6 KiB
C++
#pragma once
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#include <complex>
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#define gr_complex std::complex<float>
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#define GSM_SYMBOL_RATE (1625000.0/6.0) //symbols per second
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#define GSM_SYMBOL_PERIOD (1.0/GSM_SYMBOL_RATE) //seconds per symbol
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//Burst timing
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#define TAIL_BITS 3
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#define GUARD_BITS 8
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#define GUARD_FRACTIONAL 0.25 //fractional part of guard period
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#define GUARD_PERIOD GUARD_BITS + GUARD_FRACTIONAL
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#define DATA_BITS 57 //size of 1 data block in normal burst
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#define STEALING_BIT 1
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#define N_TRAIN_BITS 26
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#define N_SYNC_BITS 64
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#define USEFUL_BITS 142 //(2*(DATA_BITS+STEALING_BIT) + N_TRAIN_BITS )
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#define FCCH_BITS USEFUL_BITS
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#define BURST_SIZE (USEFUL_BITS+2*TAIL_BITS)
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#define ACCESS_BURST_SIZE 88
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#define PROCESSED_CHUNK BURST_SIZE+2*GUARD_PERIOD
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#define SCH_DATA_LEN 39
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#define TS_BITS (TAIL_BITS+USEFUL_BITS+TAIL_BITS+GUARD_BITS) //a full TS (156 bits)
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#define TS_PER_FRAME 8
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#define FRAME_BITS (TS_PER_FRAME * TS_BITS + 2) // 156.25 * 8
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#define FCCH_POS TAIL_BITS
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#define SYNC_POS 39
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#define TRAIN_POS ( TAIL_BITS + (DATA_BITS+STEALING_BIT) + 5) //first 5 bits of a training sequence
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//aren't used for channel impulse response estimation
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#define TRAIN_BEGINNING 5
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#define SAFETY_MARGIN 6 //
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#define FCCH_HITS_NEEDED (USEFUL_BITS - 4)
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#define FCCH_MAX_MISSES 1
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#define FCCH_MAX_FREQ_OFFSET 100
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#define CHAN_IMP_RESP_LENGTH 5
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#define MAX_SCH_ERRORS 10 //maximum number of subsequent sch errors after which gsm receiver goes to find_next_fcch state
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typedef enum { empty, fcch_burst, sch_burst, normal_burst, rach_burst, dummy, dummy_or_normal, normal_or_noise } burst_type;
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typedef enum { unknown, multiframe_26, multiframe_51 } multiframe_type;
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static const unsigned char SYNC_BITS[] = {
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1, 0, 1, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0,
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0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1,
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0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1,
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0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1
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};
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const unsigned FCCH_FRAMES[] = { 0, 10, 20, 30, 40 };
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const unsigned SCH_FRAMES[] = { 1, 11, 21, 31, 41 };
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const unsigned BCCH_FRAMES[] = { 2, 3, 4, 5 }; //!!the receiver shouldn't care about logical
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//!!channels so this will be removed from this header
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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 };
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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 };
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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 };
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#define TSC0 0
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#define TSC1 1
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#define TSC2 2
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#define TSC3 3
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#define TSC4 4
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#define TSC5 5
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#define TSC6 6
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#define TSC7 7
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#define TS_DUMMY 8
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#define TRAIN_SEQ_NUM 9
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#define TIMESLOT0 0
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#define TIMESLOT1 1
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#define TIMESLOT2 2
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#define TIMESLOT3 3
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#define TIMESLOT4 4
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#define TIMESLOT5 5
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#define TIMESLOT6 6
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#define TIMESLOT7 7
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static const unsigned char train_seq[TRAIN_SEQ_NUM][N_TRAIN_BITS] = {
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{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},
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{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},
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{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},
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{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},
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{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},
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{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},
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{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},
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{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},
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{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
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};
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//Dummy burst 0xFB 76 0A 4E 09 10 1F 1C 5C 5C 57 4A 33 39 E9 F1 2F A8
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static const unsigned char dummy_burst[] = {
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0, 0, 0,
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1, 1, 1, 1, 1, 0, 1, 1, 0, 1,
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1, 1, 0, 1, 1, 0, 0, 0, 0, 0,
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1, 0, 1, 0, 0, 1, 0, 0, 1, 1,
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1, 0, 0, 0, 0, 0, 1, 0, 0, 1,
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0, 0, 0, 1, 0, 0, 0, 0, 0, 0,
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0, 1, 1, 1, 1, 1, 0, 0,
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0, 1, 1, 1, 0, 0, 0, 1, 0, 1,
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1, 1, 0, 0, 0, 1, 0, 1, 1, 1,
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0, 0, 0, 1, 0, 1,
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0, 1, 1, 1, 0, 1, 0, 0, 1, 0,
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1, 0, 0, 0, 1, 1, 0, 0, 1, 1,
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0, 0, 1, 1, 1, 0, 0, 1, 1, 1,
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1, 0, 1, 0, 0, 1, 1, 1, 1, 1,
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0, 0, 0, 1, 0, 0, 1, 0, 1, 1,
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1, 1, 1, 0, 1, 0, 1, 0,
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0, 0, 0
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};
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