change channel.cpp

+#include"channel.h"
+#include<cstdlib>
+using namespace std;
+
+
+void Cchannel::AWGN() {
+	ofstream myout;
+	myout.open("channel.txt");
+
+	default_random_engine generator;
+	normal_distribution<double> dist(0.0, No);
+
+
+	for (int k = 0; k < Nbits / Nbitspersymbol * Nsamplespersymbol; k++)
+		n[k] = dist(generator);
+
+	matrixadd(1, Nbits / Nbitspersymbol * Nsamplespersymbol, s, n, r);
+
+	for (int i = 0; i < Nbits / Nbitspersymbol * Nsamplespersymbol; i++)
+	{
+
+		myout << r[i] << endl;
+	}
+
+	myout.close();
+}
\ No newline at end of file