seekprotocol.c

rake接收机matlab实现 完成相关接受的信道相关估计算法

/*
 * mutipath.c: Basic 'C' template for a level 2 S-function.
 *
 *  -------------------------------------------------------------------------
 *  | See matlabroot/simulink/src/sfuntmpl_doc.c for a more detailed template |
 *  -------------------------------------------------------------------------
 *
 * Copyright 1990-2002 The MathWorks, Inc.
 * $Revision: 1.27 $
 */

#define S_FUNCTION_NAME  seekprotocol
#define S_FUNCTION_LEVEL 2

#include "simstruc.h"
#include <stdlib.h>

/*--------------------------------------------------------------*/
static void mdlInitializeSizes(SimStruct *S)
{

    ssSetNumSFcnParams(S, 0);  /* Number of expected parameters */
    if (ssGetNumSFcnParams(S) != ssGetSFcnParamsCount(S)) {
        /* Return if number of expected != number of actual parameters */
        return;
    }

    ssSetNumContStates(S, 0);
    ssSetNumDiscStates(S, 1);

    if (!ssSetNumInputPorts(S, 1)) return;
    ssSetInputPortWidth(S, 0, 1);

    
	ssSetInputPortDirectFeedThrough(S, 0, 1);


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

    ssSetNumSampleTimes(S, 1);

    ssSetNumRWork(S, 0);
    ssSetNumIWork(S, 0);
    ssSetNumPWork(S, 0);
    ssSetNumModes(S, 0);
    ssSetNumNonsampledZCs(S, 0);

    ssSetOptions(S,SS_OPTION_EXCEPTION_FREE_CODE);
}


/*-----------------------------------------------------------*/


/*---------------------------------------------------------*/
static void mdlInitializeSampleTimes(SimStruct *S)
{
    ssSetSampleTime(S, 0, INHERITED_SAMPLE_TIME);
    ssSetOffsetTime(S, 0, 0.0);
     
}

/*-----------------------------------------------------------*/

#define MDL_INITIALIZE_CONDITIONS
/* Function: mdlInitializeConditions ========================================
 * Abstract:
 *    Initialize both discrete states to one.
 */
static void mdlInitializeConditions(SimStruct *S)
{
    real_T *x  = ssGetRealDiscStates(S);
    *x         =0.0;
}



/*----------------------------------------------------------------*/
static void mdlOutputs(SimStruct *S, int_T tid)
{
    

	real_T      teamp_u;
	real_T      teamp;	
	real_T            *y_0    = ssGetOutputPortRealSignal(S,0);
	real_T            *x    = ssGetRealDiscStates(S);
	InputRealPtrsType uPtrs = ssGetInputPortRealSignalPtrs(S,0);
 
	/*---------------------------------------------------------*/
	UNUSED_ARG(tid);
    teamp    = *x;

	teamp_u  = *uPtrs[0];
    if(((teamp-teamp_u)>=-1)&&((teamp-teamp_u)<=1))
	{
         *y_0 =  teamp_u;
		
	}
    else
	{
         *y_0 =  -1.0;
	
	}
}


/*--------------------------------------------------------*/
#define MDL_UPDATE  /* Change to #undef to remove function */
#if defined(MDL_UPDATE)

  static void mdlUpdate(SimStruct *S, int_T tid)
  {
	  real_T                *x              = ssGetRealDiscStates(S);
	  InputRealPtrsType		uPtrs			=ssGetInputPortRealSignalPtrs(S,0);
     
	  UNUSED_ARG(tid);
    
       *x=*uPtrs[0];
	
  }
#endif /* MDL_UPDATE */


/* Function: mdlTerminate =====================================================
 */
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