diff --git a/Transceiver52M/proto_trxd.h b/Transceiver52M/proto_trxd.h
index 9da18db..2e5ad52 100644
--- a/Transceiver52M/proto_trxd.h
+++ b/Transceiver52M/proto_trxd.h
@@ -1,28 +1,52 @@
 #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 */
+
+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
+};
+
+bool trxd_send_burst_ind_v0(size_t chan, int fd, const struct trx_ul_burst_ind *bi);
+
+/* The latest supported TRXD header format version */
+#define TRX_DATA_FORMAT_VER    0
+
 struct trxd_hdr_common {
 #if OSMO_IS_LITTLE_ENDIAN
-        uint8_t tn:3,
-                reserved:1,
-                version:4;
+	uint8_t tn:3,
+		reserved:1,
+		version:4;
 #elif OSMO_IS_BIG_ENDIAN
-        uint8_t version:4,
-                reserved:1,
-                tn:3;
+	uint8_t version:4,
+		reserved:1,
+		tn:3;
 #endif
-        uint32_t fn; /* big endian */
+	uint32_t fn; /* big endian */
 } __attribute__ ((packed));
 
 struct trxd_hdr_v0_specific {
-        uint8_t rssi;
-        uint16_t toa; /* big endian */
+	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];
+	struct trxd_hdr_common common;
+	struct trxd_hdr_v0_specific v0;
+	uint8_t soft_bits[0];
 } __attribute__ ((packed));