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+// User include file for libfec
+// Copyright 2004-2014, Phil Karn, KA9Q
+// May be used under the terms of the GNU Lesser General Public License (LGPL)
+
+#ifndef _SIM_H_
+#define _SIM_H_
+
+// Useful utilities for simulation
+double normal_rand(double mean, double std_dev);
+unsigned char addnoise(int sym, double signal, double noise);
+void setup_channel(double signal,double noise);
+unsigned char simulate(int data);
+
+#endif /* _SIM_H_ */
+
+
+