dec.h

用于LDPC编码译码的仿真实现。包括随机生成校验矩阵、由校验矩阵产生生成矩阵、编码、加随机噪声、译码等内容。原作者是老外

/* DEC.H - Interface to decoding procedures. */

/* Copyright (c) 2000, 2001 by Radford M. Neal 
 *
 * Permission is granted for anyone to copy, use, or modify this program 
 * for purposes of research or education, provided this copyright notice 
 * is retained, and note is made of any changes that have been made. 
 *
 * This program is distributed without any warranty, express or implied.
 * As this program was written for research purposes only, it has not been
 * tested to the degree that would be advisable in any important application.
 * All use of this program is entirely at the user's own risk.
 */
#ifndef DEC_H
#define DEC_H

#include "mod2sparse.h"

/* DECODING METHOD, ITS PARAMETERS, AND OTHER VARIABLES.  The global variables 
   declared here are located in dec.c. */


extern int max_iter;	/* Maximum number of iteratons of decoding to do */
extern char *gen_file;	/* Generator file for Enum_block and Enum_bit */


/* PROCEDURES RELATING TO DECODING METHODS. */



void initprp (mod2sparse *, double *, int *);
void iterprp (mod2sparse *, double *, int *,double *);
void iterprp_min_sum(mod2sparse *, double *, int *,double *);
void iterprp_min_sum_constant(mod2sparse *, double *, int *,double *,double);
void iterprp_min_sum_table(mod2sparse *, double *, int *,double *);
void iterprp_min_sum_parallel(mod2sparse *, double *, int *,double *);
void iterprp_UMP(mod2sparse *, double *, int *,double *,double);



void WBF_initprp (mod2sparse *, double *, int *);
void WBF_iterprp( mod2sparse *H, int *dblk, int *chks);

void WBF_iterprp_lxh( mod2sparse *H, double *,int *dblk, int *chks, int Num_flip,int *);
void bubble(double a[],int size,int d[] );
void ibubble(int a[],int size,int d[] );


#endif