1 files changed, 55 insertions, 0 deletions
diff --git a/src/host/layer23/src/transceiver/gsm_ab.h b/src/host/layer23/src/transceiver/gsm_ab.h
new file mode 100644
index 00000000..dc6eb7de
--- /dev/null
+++ b/src/host/layer23/src/transceiver/gsm_ab.h
@@ -0,0 +1,55 @@
+/*
+ * gsm_ab.h
+ *
+ * GSM access burst SDR support
+ *
+ * Copyright (C) 2013  Sylvain Munaut <tnt@246tNt.com>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __OSMO_GSM_AB_H__
+#define __OSMO_GSM_AB_H__
+
+
+#include <complex.h>
+
+#include <osmocom/core/bits.h>
+
+struct osmo_gmsk_state;
+struct osmo_gmsk_trainseq;
+struct osmo_cxvec;
+
+
+#define GSM_AB_TRAIN_LEN        41
+#define GSM_AB_BITS             88      /* 8 + 41 + 36 + 3 */
+
+extern const ubit_t gsm_ab_train[];
+
+
+int
+gsm_ab_detect(const struct osmo_gmsk_state *gs,
+              const struct osmo_gmsk_trainseq *rach,
+              const struct osmo_cxvec *burst, float thresh,
+              float complex *peak, float *toa);
+
+sbit_t *
+gsm_ab_demodulate(struct osmo_gmsk_state *gs,
+                  struct osmo_cxvec *burst,
+                  float complex channel, float toa);
+
+
+#endif /* __OSMO_GSM_AB_H__ */