m_sequence_and_brf.c

基于MATLAB的GSM仿真系统 并附有直接画出性能曲线的简化程序。

#include "m_sequence_and_brf.h"


/*void main()
{
  int i;
  int j=0;

  int m_sequence[kMseq];
  int reg[25]={1,0,0,0,0,0,0,0,0,0,0,0,0,0,
                        0,0,0,0,0,0,0,0,0,0,0};
  //int reg[25]={1,0,1,0,1,0,1,0,1,0,1,0,1,0,
  //                      1,0,1,0,1,0,1,0,1,0,1};
  double BER[1];
  int receive[kMseq];
	     //,0,1,0,1,1,1,0,1,1,0,0,1,0,0,0,1,1,0,1,
	              //1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
  
	for (i = 0;i<100;i++)
	{
		GSMSource(reg,m_sequence);
		for (j = 0;j<kMseq;j++)
		{
			printf("%d ",m_sequence[j]);
			//receive[j] = m_sequence[j];
			receive[j] = 0;
		}
		printf("\n");

		GSMSink(m_sequence,receive,BER);
		printf("BER:%f\n",BER[0]);
	}

}
*/

int GSMSource(int reg[25],int m_sequence[VOCODELEN])
{
	int i,t;
	//cout<<"m_sequence=";
	for(i=0;i<VOCODELEN;i++)
	{ 
		m_sequence[i]=reg[0]; 
	 
		 for(t=0;t<24;t++)
		{
			 {	
		    reg[t]=reg[t+1];
	
			 }
		  reg[24]=m_sequence[i]^reg[22];
		  //cout<<reg[t];
		}
	}
	return 0;
}


int GSMSink(int m_sequence[VOCODELEN],int receive[VOCODELEN],int count[1],int errCI[1],int errCII[1])
{
	int i,j;
	int result;

	//cout<<'\n';
	//j = 0;
	j = count[0];
    for(i=0;i<VOCODELEN;i++)
	{
		result=receive[i]^m_sequence[i];
		if(result)
			j=j+1;
	}
	count[0] = j;

	j = errCI[0];
    for(i=0;i<50;i++)
	{
		result=receive[i]^m_sequence[i];
		if(result)
			j=j+1;
	}
	errCI[0] = j;

	j = errCII[0];
    for(i=182;i<VOCODELEN;i++)
	{
		result=receive[i]^m_sequence[i];
		if(result)
			j=j+1;
	}
	errCII[0] = j;

	return 0;
}