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diff --git a/lib/decoding/tch_h_decoder_impl.h b/lib/decoding/tch_h_decoder_impl.h
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+++ b/lib/decoding/tch_h_decoder_impl.h
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+/* -*- c++ -*- */
+/*
+ * @file
+ * @author (C) 2018 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.
+ */
+
+#ifndef INCLUDED_GSM_TCH_H_DECODER_IMPL_H
+#define INCLUDED_GSM_TCH_H_DECODER_IMPL_H
+
+#include <grgsm/decoding/tch_h_decoder.h>
+#include "tch_f_decoder_impl.h"
+
+namespace gr {
+    namespace gsm {
+
+        class tch_h_decoder_impl : public tch_h_decoder
+        {
+            private:
+                unsigned int d_collected_bursts_num;
+                pmt::pmt_t d_bursts[8];
+
+                enum tch_mode d_tch_mode;
+                unsigned int d_sub_channel;
+
+                std::vector<uint8_t> d_multi_rate_codes;
+
+                bool d_boundary_check;
+                bool d_boundary_decode;
+                bool d_header_sent;
+
+                uint8_t d_ft;
+                uint8_t d_cmr;
+
+                void decode(pmt::pmt_t msg);
+            public:
+                tch_h_decoder_impl(unsigned int sub_channel, std::string multi_rate, bool boundary_check=false);
+                ~tch_h_decoder_impl();
+        };
+
+    } // namespace gsm
+} // namespace gr
+
+#endif /* INCLUDED_GSM_TCH_H_DECODER_IMPL_H */
+