s_ber_direct.c

WCDMA系统仿真C程序 希望能够对学习WCDMA技术的朋友有所帮助

/*
 | Project:     WCDMA simulation environment
 | Module:      
 | Author:      
 | Date:        February 23, 1999
 |
 | History:
 | 
 |              June 8,  1999 Maarit Melvasalo 
 |                      Initial version. 
 *
 *  File    : s_ber_calc.c
 *  Abstract:
 *
 * USER GIVEN PARAMETERS
 *
 * 1: B  = the number of real input chips 
 * 2: C  = the spreading code 
 * 3: SF = spreading factor
 *
 * 
 |
 | Copyright disclaimer:
 |   This software was developed at the National Institute of Standards
 |   and Technology by employees of the Federal Government in the course
 |   of their official duties. Pursuant to title 17 Section 105 of the
 |   United States Code this software is not subject to copyright
 |   protection and is in the public domain.
 |
 */
#define S_FUNCTION_NAME s_ber_direct
#define S_FUNCTION_LEVEL 2

#include <math.h>
#include "simstruc.h"
#include "tmwtypes.h"
#include "config_wcdma.h"
#include "wcdma_simulink.h"

//* USER GIVEN PARAMETERS AND DEFINITIONS /**/

/*Number of input and output ports/**/
#define NINPUTS   2
#define NOUTPUTS  1

/* Number of user given parameters/**/  

#define NPARAMS 2                                 

/* Input and Output Size parameters /**/
#define SIZE_PARAM(S) ssGetSFcnParam(S,0)          
#define nInput (int_T)(mxGetPr(SIZE_PARAM(S))[0])  

/* Number of frames in one block/**/
#define FRAME_PARAM(S) ssGetSFcnParam(S,1)   
#define nFrames (mxGetPr(FRAME_PARAM(S))[0]) 

/* Pointers to Input Ports */
#define I(element) (*iPtrs[element])  
#define O(element) (*oPtrs[element])  


/* Sampletime -- defined in config_cdma /**/
#define td    nFrames * TD_FRAME 

/*====================*
 * S-function methods *
 *====================*/

/* Function: mdlInitializeSizes ===============================================
 * Abstract:
 *    The sizes information is used by Simulink to determine the S-function
 *    block's characteristics (number of inputs, outputs, states, etc.).
 */
static void mdlInitializeSizes(SimStruct *S)
{
  ssSetNumSFcnParams(S, NPARAMS);  /* Number of expected parameters */

  if (ssGetNumSFcnParams(S) != ssGetSFcnParamsCount(S)) 
 {
      return;
 }
  
  if (!ssSetNumInputPorts(S, NINPUTS)) return;  
    ssSetInputPortWidth(S, 0, nInput);
    ssSetInputPortWidth(S, 1, nInput);
    ssSetInputPortDirectFeedThrough(S, 0, 1);
    ssSetInputPortDirectFeedThrough(S, 1, 1);

    if (!ssSetNumOutputPorts(S, NOUTPUTS)) return; 
    ssSetOutputPortWidth(S, 0, 1);

    ssSetNumSampleTimes(S, 1);
    ssSetNumRWork(S, 1);

    ssSetSFcnParamNotTunable(S,0); 
    ssSetSFcnParamNotTunable(S,1); 

    /* Take care when specifying exception free code - see sfuntmpl.doc */
    ssSetOptions(S, SS_OPTION_EXCEPTION_FREE_CODE);
}   /* do not use mxCalloc or  mexErrMsgTxt functions */


/* Function: mdlInitializeSampleTimes =========================================
 * Abstract:
 *    Specifiy that sampletime is given by the user
 */
static void mdlInitializeSampleTimes(SimStruct *S)
{   
     ssSetSampleTime(S, 0, td); 
     ssSetOffsetTime(S, 0, 0.0);
}

#define MDL_INITIALIZE_CONDITIONS
/* Function: mdlInitializeConditions ========================================
 * Abstract:

 */
static void mdlInitializeConditions(SimStruct *S)
{
    real_T             *rwork = ssGetRWork(S);

    rwork[0] = 0;
}

/* Function: mdlOutputs =======================================================
 * Abstract:
 * 
 */
static void mdlOutputs(SimStruct *S, int_T tid)
{
    real_T            *y    = ssGetOutputPortRealSignal(S,0);
    InputRealPtrsType iPtrs = ssGetInputPortRealSignalPtrs(S,0);
    InputRealPtrsType oPtrs = ssGetInputPortRealSignalPtrs(S,1);
    real_T            *rwork = ssGetRWork(S);
    int_T             *iwork = ssGetIWork(S); 
    int_T             i;
    
 
   for (i = 0; i < nInput; i++){
     if ( I(i) != O(i)) rwork[0] ++;
    }  

       y[0] = rwork[0];
}


/* Function: mdlTerminate =====================================================
 * Abstract:
 */
static void mdlTerminate(SimStruct *S)
{

}

#ifdef  MATLAB_MEX_FILE    /* Is this file being compiled as a MEX-file? */
#include "simulink.c"      /* MEX-file interface mechanism */
#else
#include "cg_sfun.h"       /* Code generation registration function */
#endif