Transceiver52M/grgsm_vitac/constants.h

#pragma once
/* -*- c++ -*- */
/*
 * @file
 * @author (C) 2009-2017  by 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.
 */

#include <complex>

#define gr_complex std::complex<float>


#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 ACCESS_BURST_SIZE 88
#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          (TAIL_BITS + 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
};