main.c

zigzag纠错码是一种非常简单但却具有非常优秀性能的码。非常适合用于中码率或者高码率编码的系统。此为一位教授提供的源码。

/*******************************************************************/
/*                                                                 */
/*           Zigzag Codes and Concatenated Zigzag Codes            */
/*            IEEE Transactions on Information Theory              */
/*             vol. 47, no. 2, pp. 800-807, Feb. 2001              */
/*                                                                 */
/*******************************************************************/


#include <stdio.h> 
#include <stdlib.h> 
#include <math.h>

int SimPtNum		= 5;	//This is the number of Eb/No points to be simulated.
int ErrorNum		= 500;	//This is the error number to be collected.
int IterationNum	= 18; 
int InterleaverReset	= -1;	//The interval to general a new interleaver.
				//Always use the same interleaver if it is less than one.
double EbNoStart	= 0.0;	//In dB
double EbNoStep		= 0.5;

void Sweep( double *r, double (*ber)( double, int ) );
void Error( char *message );

extern void Presim( );
extern double Sim( double EbOverNo, int num );
 
int main( )
{
	double results[100];
	Presim( );
	Sweep( results, (*Sim) );
        return 0;
}


void Sweep( double *r, double (*ber)( double, int ) )
{
	double snr;
	int i;
	snr = EbNoStart;
	for( i=0; i<SimPtNum; i++ )
	{
		r[i] = ber(snr, ErrorNum); 
		fprintf( stdout, "%le %le \n", snr, r[i] );
		fflush( stdout );
		fprintf( stderr, "%le %le \n", snr, r[i] );
		snr += EbNoStep;
	}
}

void Error( char *message )
{
	fprintf( stderr, "ERROR - %s\n", message );
	exit( -1 );
}