random.h

Turbo码BCJR传统经典算法的C语言实现,经典,对于学习MAP算法的人很有帮助.

#include <stdlib.h>
#include <stdio.h>
#include <values.h>
#include <math.h>
#include <time.h>
#include <limits.h>

#ifndef RANDOM_H
#define RANDOM_H

#define IM1 2147483563
#define IM2 2147483399
#define AM (1.0/IM1)
#define IMM1 (IM1-1)
#define IA1 40014
#define IA2 40692
#define IQ1 53668
#define IQ2 52774
#define IR1 12211
#define IR2 3791
#define NTAB 32
#define NDIV (1+IMM1/NTAB)
#define EPS MINDOUBLE
#define RNMX (1.0-EPS)

// a uniform random number generator between zero and 1.
class Random
{
	long idum2;
   long idum;
	long iy;
	long iv[NTAB];

   unsigned memory;
   void init(long seed);
   double ran2();
public:
	Random(long seed);
   Random();
	double doublerandom();
   long longrandom(long range);
   bool boolrandom();
};

#endif  // RANDOM_H