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#pragma once
#include <stdint.h>
#include <stdbool.h>
#include <unistd.h>
#include <math.h>
#include <osmocom/core/endian.h>
#include "debug.h"
#define MAX_RX_BURST_BUF_SIZE 444 /* 444 = EDGE_BURST_NBITS */
enum Modulation {
MODULATION_GMSK,
MODULATION_8PSK,
/* Not supported yet:
MODULATION_AQPSK,
MODULATION_16QAM,
MODULATION_32QAM
*/
};
struct trx_ul_burst_ind {
float rx_burst[MAX_RX_BURST_BUF_SIZE]; /* soft bits normalized 0..1 */
unsigned nbits; // number of symbols per slot in rxBurst, not counting guard periods
uint32_t fn; // TDMA frame number
uint8_t tn; // TDMA time-slot number
double rssi; // in dBFS
double toa; // in symbols
double noise; // noise level in dBFS
bool idle; // true if no valid burst is included
enum Modulation modulation; // modulation type
uint8_t tss; // training sequence set
uint8_t tsc; // training sequence code
float ci; // Carrier-to-Interference ratio, in dB
};
bool trxd_send_burst_ind_v0(size_t chan, int fd, const struct trx_ul_burst_ind *bi);
bool trxd_send_burst_ind_v1(size_t chan, int fd, const struct trx_ul_burst_ind *bi);
/* The latest supported TRXD header format version */
#define TRX_DATA_FORMAT_VER 1
struct trxd_hdr_common {
#if OSMO_IS_LITTLE_ENDIAN
uint8_t tn:3,
reserved:1,
version:4;
#elif OSMO_IS_BIG_ENDIAN
uint8_t version:4,
reserved:1,
tn:3;
#endif
uint32_t fn; /* big endian */
} __attribute__ ((packed));
struct trxd_hdr_v0_specific {
uint8_t rssi;
uint16_t toa; /* big endian */
} __attribute__ ((packed));
struct trxd_hdr_v0 {
struct trxd_hdr_common common;
struct trxd_hdr_v0_specific v0;
uint8_t soft_bits[0];
} __attribute__ ((packed));
#define TRXD_MODULATION_GMSK(ts_set) (0b0000 | (ts_set & 0b0011))
#define TRXD_MODULATION_8PSK(ts_set) (0b0100 | (ts_set & 0b0001))
#define TRXD_MODULATION_AQPSK(ts_set) (0b0110 | (ts_set & 0b0001))
#define TRXD_MODULATION_16QAM(ts_set) (0b1000 | (ts_set & 0b0001))
#define TRXD_MODULATION_32QAM(ts_set) (0b1010 | (ts_set & 0b0001))
struct trxd_hdr_v1_specific {
#if OSMO_IS_LITTLE_ENDIAN
uint8_t tsc:3,
modulation:4,
idle:1;
#elif OSMO_IS_BIG_ENDIAN
uint8_t idle:1,
modulation:4,
tsc:3;
#endif
int16_t ci; /* big endian, in centiBels */
} __attribute__ ((packed));
struct trxd_hdr_v1 {
struct trxd_hdr_common common;
struct trxd_hdr_v0_specific v0;
struct trxd_hdr_v1_specific v1;
uint8_t soft_bits[0];
} __attribute__ ((packed));
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