channel revised

@@ -6,9 +6,24 @@
 #include "variables.h"
 class Cchannel {
 public:
-	Cchannel() {};
+	Cchannel();
 	float *s; // trasmitted signal
-	float r[Nbits / Nbitspersymbol*Nsamplespersymbol]; // corrupted signal
+	float r[Nbits]; // corrupted signal
+	float noise[Nbits];
 	void AWGN();
 };
+
+Cchannel::Cchannel()
+{
+	default_random_engine generator;
+	normal_distribution<double> myGauss(0, No / 2);
+	for (int i = 0; i < Nbits; i++)
+		noise[i] = myGauss(generator);
+}
+
+void Cchannel::AWGN()
+{
+	for (int i = 0; i < Nbits; i++)
+		r[i] = s[i] + noise[i];
+}
 #endif
\ No newline at end of file