scramble.cpp

CDMA2000

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

 int *scramble(int *string_scramble)
{
   int *p_scramble = (int   *)malloc(768*sizeof(int));   
   static int string_afterscramble[768];
  // int mask[42]={1,1,0,0,0,1,1,0,0,1,1,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,0,1,1};
   int mask[42]={1,1,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,1,1,0,0,1,1,0,0,0,1,1};
   int lcode_generator[42]={1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
   int longcode[768*32];
   int a=0,b=0;
   int i=0;
   int j=0;

   for(i=0;i<=768*32-1;i++)
   {
	   a=0;
	   for(j=0;j<=41;j++)                    //生成长码
	   {
	   a=a ^ (mask[j]&lcode_generator[j]);
	   }
	   longcode[i]=a;

	   b=lcode_generator[41];                             //寄存器移位
	   for(j=41;j>=1;j--)
	   {
		   lcode_generator[j]=lcode_generator[j-1];
	   }
	   lcode_generator[0]=b;

	   for(j=0;j<=41;j++)
	   {
		   if(j==1||j==2||j==3||j==5||j==6||j==7||j==10||j==16||j==17||j==18||j==19||j==21||j==22||j==25||j==26||j==27||j==31||j==33||j==35)   //多项式所包含项
		   {
			   lcode_generator[j]=lcode_generator[j]^b;
		   }
		                         //多项式不包含项
	   }
   }
   j=0;
   for(i=0;i<=768*32-1;i++)                         
   {
	   if(i%32==0)               //分频
	   {
          string_afterscramble[j] =*(string_scramble+j)^longcode[i];      //与交织处理后的码元模2相加输出
		  j++;
	   }
   }
   return (string_afterscramble); 
}
   
   
void main()
{
	int string[768]={1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
					  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,1,1,
	 1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
					  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,1,1,1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
					  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,1,1,1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
					  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,
	                  1,0,1,1,0,0,1,1,0,1,1,1};
	int *s;
	int j;
	s=scramble(string);
		   for(j=0;j<=767;j++)
	   {
		   printf("%d",*(s+j));
	   }
	    
}