diff options
Diffstat (limited to 'gsm-tvoid/src/lib/gsm_constants.h')
| -rw-r--r-- | gsm-tvoid/src/lib/gsm_constants.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/gsm-tvoid/src/lib/gsm_constants.h b/gsm-tvoid/src/lib/gsm_constants.h new file mode 100644 index 0000000..942736d --- /dev/null +++ b/gsm-tvoid/src/lib/gsm_constants.h @@ -0,0 +1,127 @@ +#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 //8.25
+#define DATA_BITS 58 //size of 1 data block in normal burst
+#define N_TRAIN_BITS 26
+#define N_SYNC_BITS 64
+#define USEFUL_BITS 142 //(2*DATA_BITS + N_TRAIN_BITS )
+#define FCCH_BITS USEFUL_BITS
+
+#define TS_BITS (TAIL_BITS+USEFUL_BITS+TAIL_BITS+GUARD_BITS) //a full TS (156)
+#define TS_PER_FRAME 8
+#define FRAME_BITS (TS_PER_FRAME * TS_BITS + 2) // +2 for extra 8*0.25 guard bits
+#define FCCH_POS TAIL_BITS
+#define SYNC_POS 39
+#define TRAIN_POS 58
+
+static const float gaussian_impulse[] = { 0.03455935, 0.39947558, 0.90323022, 0.39947558, 0.03455935};
+
+enum SYNC_STATE {
+ WAIT_FCCH,
+ WAIT_SCH_ALIGN,
+ WAIT_SCH,
+ SYNCHRONIZED
+};
+
+enum BURST_TYPE {
+ UNKNOWN,
+ FCCH,
+ PARTIAL_SCH, //successful correlation, but missing data
+ SCH,
+ CTS_SCH,
+ COMPACT_SCH,
+ NORMAL,
+ DUMMY,
+ ACCESS
+};
+
+
+static const int 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
+};
+
+static const int CTS_SYNC[] = {
+ 1, 1, 1, 0, 1, 1, 1, 0, 0, 1, 1, 0, 1, 0, 1, 1,
+ 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0,
+ 1, 1, 1, 1, 0, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0,
+ 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1
+};
+
+static const int COMPACT_SYNC[] = {
+ 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 1,
+ 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0,
+ 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0,
+ 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 1, 0
+};
+
+// Sync : .+...++.+..+++.++++++.++++++....++.+..+.+.+++.+.+...+..++++..+..
+// Diff Encoded Sync: .++..+.+++.+..++.....++.....+...+.+++.+++++..+++++..++.+...+.++.
+
+#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_FCCH 8
+#define TS_DUMMY 9
+
+static const unsigned char train_seq[10][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},
+ {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, //#9 FCCH ;-)
+ {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[] = {
+ 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
+};
+
+//Diff encoded train_seq
+//TSC0: +.++.+++..+...++..++.+++..
+//TSC1: +.+++.++..++...+..++.+++..
+//TSC2: +++...+..++..+++.++...+..+
+//TSC3: +++..+...++.+++..++..+...+
+//TSC4: +..+.++++..+.++....+.++++.
+//TSC5: +++.+..++++.+....++.+..+++
+//TSC6: .+++.+....++.+..++++.+....
+//TSC7: ...++...+..++.+++..++...+.
+//TSC8: ..........................
+//TSC9: ++..+..+++..+..+++..+..+++
+
+
+#endif /* INCLUDED_GSM_CONSTANTS_H */
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