diff options
Diffstat (limited to 'src/lib/gsm_constants.h')
| -rw-r--r-- | src/lib/gsm_constants.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/lib/gsm_constants.h b/src/lib/gsm_constants.h index d08df17..1e449b3 100644 --- a/src/lib/gsm_constants.h +++ b/src/lib/gsm_constants.h @@ -6,7 +6,9 @@ //Burst timing #define TAIL_BITS 3 -#define GUARD_BITS 8.25 +#define GUARD_BITS 8 +#define GUARD_FRACTIONAL 0.25 //fractional part of guard period +#define GUARD_PERIOD GUARD_BITS + GUARD_FRACTIONAL #define DATA_BITS 58 //size of 1 data block in normal burst #define N_TRAIN_BITS 26 #define N_SYNC_BITS 64 @@ -14,9 +16,9 @@ #define FCCH_BITS USEFUL_BITS #define BURST_SIZE (USEFUL_BITS+2*TAIL_BITS) -#define TS_BITS (TAIL_BITS+USEFUL_BITS+TAIL_BITS+GUARD_BITS) //a full TS (156) +#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) +#define FRAME_BITS (TS_PER_FRAME * TS_BITS + 2) // 156.25 * 8 #define FCCH_POS TAIL_BITS #define SYNC_POS 39 #define TRAIN_POS 58 @@ -24,6 +26,7 @@ #define FCCH_HITS_NEEDED (USEFUL_BITS - 4) #define FCCH_MAX_MISSES 1 +#define FCCH_MAX_FREQ_OFFSET 100 #define CHAN_IMP_RESP_LENGTH 5 |