#include	<stdio.h>
#include    <math.h>
#include	<time.h>			
#include 	<stdlib.h>			

/*---------------------------------------------------------*/
/* Parameters                                              */
/*---------------------------------------------------------*/
#define	sqr(x)			((x)*(x))
#define	PI				3.141592654 /* acos(-1.0) */
#define	OneBySqrt2		0.707106781 /* 1.0/sqrt(2.0) */

#define	SYMBOLN			100            //對應的QPSK的symbol數目
#define	BITN			(SYMBOLN*2)    //發送信息Bit的數目
#define	LOOPN			30000          //多次結果去平均
#define	FILENAME		"awgn.dat" //存放仿真結果的文件

/*---------------------------------------------------------*/
/* Prototype                                               */
/*---------------------------------------------------------*/
void transmitter(int (*bit), double (*signal)[2]);
void bit_generator(int (*bit));
void QPSK_modulator(int (*bit), double (*signal)[2]);

void rotation(double (*signal)[2]);
void awgn(double (*)[2], double (*)[2]);

void receiver(double (*signal)[2], int (*bit));
void QPSK_demodulator(double (*signal)[2], int (*bit));

void BER(int loop, int (*tbit), int (*rbit));
/*---------------------------------------------------------*/