encodehelpers.h

This a framework to test new ideas in transmission technology. Actual development is a LDPC-coder in

#ifndef ENCODEHELPERS_H__
#define ENCODEHELPERS_H__

//#include "spc.h"
//#include "debugging.h"
#include "graphcreate.h"

/**************************
* multiply a vector with  *
* a specified part of H   *
* using the sparseness of *
* the graph               *
**************************/
void graphmultiply(graphs *graph, int rowstart, int rowend,
                                  int colstart, int colend,
                                  int *in, int *out);


/********************************
* perform a multiplication      *
* with T^-1 without explicitly  *
* computing T^-1 using the fact *
* that T is lower triangular    *
* and sparse                    *
********************************/
void multiplybytminusone(graphs *graph, int gap, int *in, int *out);


/******************
*  clear an array *
******************/
void cleararray (int *array, int length);


/******************
*  print a matrix *
******************/
void printmatrix (int *matrix, int gap, int vnodenum);


#endif