sequence.h

Go to the documentation of this file.

#ifndef SEQUENCE_H
#define SEQUENCE_H

#include <itpp/base/vec.h>
#include <itpp/base/mat.h>
#include <itpp/itexports.h>

namespace itpp
{

class ITPP_EXPORT LFSR
{
public:
  LFSR(void) {};
  LFSR(const bvec &connections);
  LFSR(const ivec &connections);
  void set_connections(const bvec &connections);
  void set_connections(const ivec &connections);
  void set_state(const bvec &state);
  void set_state(const ivec &state);
  bin shift(void);
  bvec shift(int no_shifts);
  int get_length(void);
  bvec get_state(void);
private:
  bvec memory, Connections;
};

class ITPP_EXPORT Gold
{
public:
  Gold(int degree);
  Gold(const bvec &mseq1_connections, const bvec &mseq2_connections);
  Gold(const ivec &mseq1_connections, const ivec &mseq2_connections);
  void set_state(const bvec &state1, const bvec &state2);
  void set_state(const ivec &state1, const ivec &state2);
  bin shift(void);
  bvec shift(int no_shifts);
  int get_sequence_length(void);
  bmat get_family(void);
private:
  int N;
  LFSR mseq1, mseq2;
};

// --------------- Inlines ---------------------
inline bin LFSR::shift(void) {bin temp = memory * Connections;memory.shift_right(temp);return temp;}
inline int LFSR::get_length(void) {return memory.size();}
inline bvec LFSR::get_state(void) {return memory;}

inline bin Gold::shift(void) {return (mseq1.shift() + mseq2.shift());}
inline int Gold::get_sequence_length(void) {return N;}


// --------------- Functions ---------------------

ITPP_EXPORT smat wcdma_spreading_codes(int SF);

} // namespace itpp

#endif // #ifndef SEQUENCE_H