diff --git a/python/qa_gsm_demapper_data.py b/python/qa_gsm_demapper_data.py
new file mode 100644
index 0000000..7554af5
--- /dev/null
+++ b/python/qa_gsm_demapper_data.py
@@ -0,0 +1,26 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# @file
+# @author (C) 2019 by Vasil Velichkov <vvvelichkov@gmail.com>
+# @section LICENSE
+#
+# Gr-gsm is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# Gr-gsm 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with gr-gsm; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+#
+
+bursts = [format((2**(i+1))-1, '0<148b') for i in range(0,108)]
+frames = range(0, 108)
+timeslots = [0] * len(frames)