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diff --git a/src/FrequencyInterleaver.h b/src/FrequencyInterleaver.h
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+++ b/src/FrequencyInterleaver.h
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+/*
+   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 Her Majesty
+   the Queen in Right of Canada (Communications Research Center Canada)
+ */
+/*
+   This file is part of CRC-DADMOD.
+
+   CRC-DADMOD 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 of the
+   License, or (at your option) any later version.
+
+   CRC-DADMOD 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 CRC-DADMOD.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef FREQUENCY_INTERLEAVER_H
+#define FREQUENCY_INTERLEAVER_H
+
+#ifdef HAVE_CONFIG_H
+#   include <config.h>
+#endif
+
+
+#include "ModCodec.h"
+
+#include <sys/types.h>
+
+
+class FrequencyInterleaver : public ModCodec
+{
+public:
+    FrequencyInterleaver(size_t mode);
+    virtual ~FrequencyInterleaver();
+    FrequencyInterleaver(const FrequencyInterleaver&);
+    FrequencyInterleaver& operator=(const FrequencyInterleaver&);
+
+
+    int process(Buffer* const dataIn, Buffer* dataOut);
+    const char* name() { return "FrequencyInterleaver"; }
+
+protected:
+    size_t d_carriers;
+    size_t d_num;
+    size_t* d_indexes;
+};
+
+#endif // FREQUENCY_INTERLEAVER_H