#ifndef _CHANNEL_H
#define	_CHANNEL_H


#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <math.h>
#include <unistd.h>

typedef struct
{
  float re;
  float im;
}symbol;	


float gngauss(float mean, float sigma);
 
void addnoise(float es_ovr_n0, long channel_len, symbol *in_array, symbol *out_array);

#endif