signal_determination_wrapper.c

无线通信中空时分组码matlab(simlink)仿真方案

/*
  *
  *   --- THIS FILE GENERATED BY S-FUNCTION BUILDER: 3.0 ---
  *
  *   This file is a wrapper S-function produced by the S-Function
  *   Builder which only recognizes certain fields.  Changes made
  *   outside these fields will be lost the next time the block is
  *   used to load, edit, and resave this file. This file will be overwritten
  *   by the S-function Builder block. If you want to edit this file by hand, 
  *   you must change it only in the area defined as:  
  *
  *        %%%-SFUNWIZ_wrapper_XXXXX_Changes_BEGIN 
  *            Your Changes go here
  *        %%%-SFUNWIZ_wrapper_XXXXXX_Changes_END
  *
  *   For better compatibility with the Real-Time Workshop, the
  *   "wrapper" S-function technique is used.  This is discussed
  *   in the Real-Time Workshop User's Manual in the Chapter titled,
  *   "Wrapper S-functions".
  *
  *   Created: Sun Aug 21 19:41:48 2005
  */


/*
 * Include Files
 *
 */
#if defined(MATLAB_MEX_FILE)
#include "tmwtypes.h"
#include "simstruc_types.h"
#else
#include "rtwtypes.h"
#endif
/* %%%-SFUNWIZ_wrapper_includes_Changes_BEGIN --- EDIT HERE TO _END */
#include <math.h>
/* %%%-SFUNWIZ_wrapper_includes_Changes_END --- EDIT HERE TO _BEGIN */
#define u_width 2
#define y_width 1
/*
 * Create external references here.  
 *
 */
/* %%%-SFUNWIZ_wrapper_externs_Changes_BEGIN --- EDIT HERE TO _END */
/* extern double func(double a); */
/* %%%-SFUNWIZ_wrapper_externs_Changes_END --- EDIT HERE TO _BEGIN */

/*
 * Output functions
 *
 */
void signal_determination_Outputs_wrapper(const real_T *h2,
                          const creal_T *x,
                          real_T *y0)
{
/* %%%-SFUNWIZ_wrapper_Outputs_Changes_BEGIN --- EDIT HERE TO _END */
              // -----this is for 16QAM-----//
               /* double Constellations_re[16]={1,0.9239,0.7071,0.3827,0.0000,-0.3827,-0.7071,-0.9239,-1.0000,-0.9239,-0.7071,-0.3827,-0.0000,0.3827,0.7071,0.9239};
                  double Constellations_im[16]={0,0.3827,0.7071,0.9239,1.0000,0.9239,0.7071,0.3827,0.0000,-0.3827,-0.7071,-0.9239,-1.0000,-0.9239,-0.7071,-0.3827};
               */
                // -----this is for 8-PSK  (gray coding)------//
               double Constellations_re[8]={1.0000,0.7071,0.0000,-0.7071,-1.0000,-0.7071,-0.0000,0.7071};
               double Constellations_im[8]={0,0.7071,1.0000,0.7071,0.0000,-0.7071,-1.0000,-0.7071};
               int    SignalPoints[8]={0,1,3,2,6,7,5,4};
               // ----this is for BPSK-----//
               /* double Constellations_re[2]={1,-1};
                  double Constellations_im[2]={0,0};
               //---- this is for QPSK-----//
               /*double Constellations_re[4]={1,0,-1,0};
               double Constellations_im[4]={0,1,0,-1};
               int    SignalPoints[4]={0,1,3,2};*/
                 double temp_h,temp_x[8],temp_d[8],temp1,temp2;
                 int m,n;
                   
                  temp_h=0;
                  for (m=0;m<=1;m++)
                  {   temp_h=temp_h+h2[m];    
                  }
                  temp_h=temp_h-1;
                  
                  
                  
                  for (m=0;m<=7;m++)
                  {   temp_x[m]=Constellations_re[m]*Constellations_re[m]+Constellations_im[m]*Constellations_im[m];
                      temp_x[m]=temp_x[m]*temp_h;
                  }
                  
                  for (m=0;m<=1;m++)
                  {   for (n=0;n<=7;n++)
                      {   temp1=x[m].re-Constellations_re[n];
                          temp2=x[m].im-Constellations_im[n];
                          temp_d[n]=temp1*temp1+temp2*temp2+temp_x[n];        
                      }
                      temp1=999999;
                      for (n=0;n<=7;n++)
                      {   if (temp_d[n]<temp1)
                          {   temp1=temp_d[n];
                              y0[m]=SignalPoints[n];
                          }
                      }
                  }
/* %%%-SFUNWIZ_wrapper_Outputs_Changes_END --- EDIT HERE TO _BEGIN */
}