rdd-exclusion.rar_Walsh 扩频_cdma2000

#include <stdio.h> #include <math.h> #include <string.h> #include <stdlib.h> int *spreadspectrum(int *string_spreadspectrum) { int *pi = (int *)malloc(384*sizeof(int)); int *pq = (int *)malloc(384*sizeof(int)); int *pi_ss = (int *)malloc((384*64)*sizeof(int)); //WALSH调制后 I信道 int *pq_ss = (int *)malloc((384*64)*sizeof(int)); //WALSH调制后 Q信道 int scode_i_generator[15]={1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; //短码发生器初始值I int scode_q_generator[15]={1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; //短码发生器初始值Q int *pn_i =(int *)malloc(384*64*sizeof(int)); //生成的短码 I int *pn_q =(int *)malloc(384*64*sizeof(int)); //生成的短码 Q static int string_afterss[384*64*2]; //前半为I后半为Q int walsh[64]={1,1,1,1,-1,-1,-1,-1, 1,1,1,1,-1,-1,-1,-1, 1,1,1,1,-1,-1,-1,-1, 1,1,1,1,-1,-1,-1,-1, 1,1,1,1,-1,-1,-1,-1, 1,1,1,1,-1,-1,-1,-1, 1,1,1,1,-1,-1,-1,-1, 1,1,1,1,-1,-1,-1,-1}; int i=0; int j=0; int k=0; int a=0; for(i=0;i<=383;i++) { *(pi+i)=*(string_spreadspectrum+i); } for(i=0;i<=383;i++) { *(pq+i)=*(string_spreadspectrum+384+i); } for(i=0;i<=383;i++) //I-chip { for(j=0;j<=63;j++) { *(pi_ss+64*i+j)=*(pi+i) * walsh[j]; } } for(i=0;i<=383;i++) //Q-chip { for(j=0;j<=63;j++) { *(pq_ss+64*i+j)=*(pq+i) * walsh[j]; } } for(i=0;i<=768*32-1;i++) //I信道的短PN码 { *(pn_i+i)=scode_i_generator[14]; //生成短码 a=scode_i_generator[14]; //寄存器移位 for(j=14;j>=1;j--) { scode_i_generator[j]=scode_i_generator[j-1]; } scode_i_generator[0]=a; for(j=0;j<=14;j++) { if(j==5||j==7||j==8||j==9||j==13) //多项式所包含项 { scode_i_generator[j]=scode_i_generator[j]^a; } //多项式不包含项 } } for(i=0;i<=768*32-1;i++) //Q信道的短PN码 { *(pn_q+i)=scode_q_generator[14]; //生成短码 a=scode_q_generator[14]; //寄存器移位 for(j=14;j>=1;j--) { scode_q_generator[j]=scode_q_generator[j-1]; } scode_q_generator[0]=a; for(j=0;j<=14;j++) { if(j==3||j==4||j==5||j==6||j==10||j==11||j==12) //多项式所包含项 { scode_q_generator[j]=scode_q_generator[j]^a; } //多项式不包含项 } } for(i=0;i<=768*32-1;i++) //短码进行符号映射 I { if(*(pn_i+i)==0) { *(pn_i+i)=1; } else { *(pn_i+i)=-1; } } for(i=0;i<=768*32-1;i++) // 短码进行符号映射 Q { if(*(pn_q+i)==0) { *(pn_q+i)=1; } else { *(pn_q+i)=-1; } } for(i=0;i<=768*32-1;i++) // 复加扰 { string_afterss[i]=*(pn_i+i) * *(pi_ss+i) - *(pn_q+i) * *(pq_ss+i); string_afterss[i+768*32]=*(pn_q+i) * *(pi_ss+i) + *(pn_i+i) * *(pq_ss+i); } return (string_afterss); } 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=spreadspectrum(string); for(j=0;j<=768*32*2-1;j++) { printf("%d ",*(s+j)); } }