kasami.h

Kasami序列产生器 用于扩频通信

#ifndef _KASAMI_H
#define _KASAMI_H

/*
 * $Log: kasami.h,v $
 * Revision 1.1  2000/05/03 14:30:04  bjc97r
 * Initial revision
 *
 */

#include "mseq.h"

typedef struct {
  Mseq *mseq0; /* 1st m-sequence generator */
  Mseq *mseq1; /* 2nd m-sequence generator */
} Kasami;

/*
 * It creates a Kasami code generator. Only the generator polynomial 
 * for the main m-sequence is specified through the arguments. 
 * The sub-sequence polynomial is calculated internally based on the
 * main polynomial. The relative shift of the subsequence is controlled
 * by the subsequence 'seed' argument. The initial state of the main
 * m-sequence generator is fixed to 1.
 */
Kasami *kasami_create( unsigned deg, unsigned long poly, unsigned long seed );

/*
 * kasami_free() deallocates the memory space for 
 * the Kasami sequence generators.
 */
void kasami_free( Kasami *kasami );

/* kasami() gives the next Kasami sequence in unipolar form, ie 1 or 0. */
char kasami( Kasami *id );


#endif  /* _KASAMI_H */