transmit.c

应用于无线通信的OFDM解调和RS解码源程序。64点FFT

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

WordType FrameTx = TotalFrame;
WordType FrameRx = TotalFrame;
float DataBuffer[NullSampleSize / 2 + NullSampleSize + SymbolSize * 3];

main()
{
	FILE *ReadFile, *OriSource, *TransmitTxt;
	int i, j, k = 0;
	short SourceData[SrcVector];
	//float ModuData[SymbolSize * (SymPerFrame + 2) + NullSampleSize + HeaderSize];
	//float ModuData[SymbolSize * (SymPerFrame + 2) + NullSampleSize];
	short ModuData[SymbolSize * (SymPerFrame + 2) + NullSampleSize];

	if ((ReadFile = fopen("3@pcm_515out.bin", "rb")) == NULL)
	{
		printf("Source data file cannot be opened !\n\n");
		exit(0);
	}
	rewind(ReadFile);
	fseek(ReadFile, 0, SEEK_SET);
	if ((OriSource = fopen("Data_Original.bin", "wb")) == NULL)
	{
		printf("Original transmitted data file cannot be opened !\n\n");
		exit(0);
	}
	rewind(OriSource);
	//if ((TransmitTxt = fopen("Data_Transmit.bin", "wb")) == NULL)
	if ((TransmitTxt = fopen("3@pcm_COFDM_Tx.bin", "wb")) == NULL)
	{
		printf("Transmit file cannot be opened !\n\n");
		exit(0);
	}
	rewind(TransmitTxt);

	printf("Channel coding & modulating ...\n\n");

	Init_RS();

	/* Generate a set of pre-signal */
/*	for (i = 0; i < HeaderSize; i++)
	{
		ModuData[i] = (float)(0.3 * (sin(2 * PI * 0.1125 * i) + sin(2 * PI * 0.05 * i)));
	}
	fwrite(ModuData, sizeof(float), HeaderSize, TransmitTxt);*/

	/* Proceed channel encode & modulation */
	for (i = 0; i < 1500; i++)
	{
		fread(SourceData, sizeof(short), SrcVector, ReadFile);
		for (j = 0; j < SrcVector; j++)
		{
			SourceData[j] &= 1;
		}
	//	fwrite(SourceData, sizeof(short), SrcVector, OriSource);
		
		j = Transmit(SourceData, ModuData);
		
		/* For (float) type saving */
		fwrite(ModuData, sizeof(short), j, TransmitTxt);

		if (fmod((double)i, 200.0) == 0)
		{
			printf("Processed speech frame number: %d\n", i);
		}
	}
	printf("\nAccomplished !\n\n");
	printf("Actual speech frame number: %d\n", i);

	/* Fill up an integrate OFDM frame 200ms in length */
	while ( !((j == (SymbolSize * SymPerFrame)) && (FrameTx == TotalFrame)) )
	{
		for (i = 0; i < SrcVector; i++)
		{
			SourceData[i] = 0;
		}
		fwrite(SourceData, sizeof(short), SrcVector, OriSource);
		j = Transmit(SourceData, ModuData);
		/* For (float) type saving */
		fwrite(ModuData, sizeof(short), j, TransmitTxt);
		k++;
	}
	printf("Padded zero speech frame number: %d\n\n", k);

	/* Add padded zero samples & generate a set of post-signal */
	for (i = 0; i < NullSampleSize; i++)
	{
		ModuData[i] = 0;
	}
	fwrite(ModuData, sizeof(short), NullSampleSize, TransmitTxt);
/*	for (i = 0; i < HeaderSize; i++)
	{
		ModuData[i] = (float)(0.3 * (sin(2 * PI * 0.1125 * i) + sin(2 * PI * 0.05 * i)));
	}
	fwrite(ModuData, sizeof(float), HeaderSize, TransmitTxt);*/

	fclose(ReadFile);
	fclose(OriSource);
	fclose(TransmitTxt);
}