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diff --git a/gr-trellis/src/lib/interleaver.h b/gr-trellis/src/lib/interleaver.h
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+++ b/gr-trellis/src/lib/interleaver.h
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+/* -*- c++ -*- */
+/*
+ * Copyright 2002 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio 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 2, or (at your option)
+ * any later version.
+ *
+ * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef INCLUDED_TRELLIS_INTERLEAVER_H
+#define INCLUDED_TRELLIS_INTERLEAVER_H
+
+#include <vector>
+
+/*!
+ * \brief  INTERLEAVER class
+ */
+class interleaver {
+private:
+  int d_K;
+  std::vector<int> d_INTER;
+  std::vector<int> d_DEINTER;
+public:
+  interleaver();
+  interleaver(const interleaver & INTERLEAVER);
+  interleaver(const int K, const std::vector<int> & INTER);
+  interleaver(const char *name);
+  int K () const { return d_K; }
+  const std::vector<int> & INTER () const { return d_INTER; }
+  const std::vector<int> & DEINTER () const { return d_DEINTER; }
+};
+
+#endif