receive.c

基于TMS320F2812的AMR+RS编解码+OFDM调制解调源程序。是stand alone运行版本

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "Setting.H"
#include "RS.H"
#include "TxRx.H"

extern WordType FrameRx;
extern WordType RxFirstFrame;
extern int DemoduFlag;
extern int buffer4[];
extern int Voltage3[];
extern int DemoduFrame;
extern int *pADCModuData;
extern int *ModuDatapoint;
extern int *ModuFindFrame;
int  DataBuffer[NullSampleSize / 2 + NullSampleSize + SymbolSize * 3];


RS_OFDM_Demod()
{

	//int i,j;
	/* Buffer for received data */
	//float ModuData[SymbolSize * (SymPerFrame + 2) + NullSampleSize + HeaderSize];
	int *DecoData = buffer4;
	ModuDatapoint = pADCModuData;
	if (FrameRx == TotalFrame)      /* Meet the head of a frame      */
	{
	    ModuDatapoint = ModuDatapoint + 176;			   			     
	}
		
		/* Save the data used in FindFrame for next OFDM frame 
	if (FrameRx == 3)
	{
		for (i = 0; i < NullSampleSize / 2; i++)
		{
			DataBuffer[i] = 
				abs(DeModuData[SymPerFrame * SymbolSize - NullSampleSize / 2 + i]);  
		}
	}*/

	/* Proceed demodulation & channel decode */
	DemoduFrame = (int)Receive(ModuDatapoint, DecoData);
	if(pADCModuData == Voltage3)
   	  pADCModuData = Voltage3 + 1040;
   	else
      pADCModuData = Voltage3;  
}