sequence.h

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// SPUC - Signal processing using C++ - A DSP library
/*---------------------------------------------------------------------------*
 *                                   IT++                                    *
 *---------------------------------------------------------------------------*
 * Copyright (c) 1995-2001 by Tony Ottosson, Thomas Eriksson, Pål Frenger,   *
 * Tobias Ringström, and Jonas Samuelsson.                                   *
 *                                                                           *
 * Permission to use, copy, modify, and distribute this software and its     *
 * documentation under the terms of the GNU General Public License is hereby *
 * granted. No representations are made about the suitability of this        *
 * software for any purpose. It is provided "as is" without expressed or     *
 * implied warranty. See the GNU General Public License for more details.    *
 *---------------------------------------------------------------------------*/

#ifndef __sequence_h
#define __sequence_h

#include <converters.h>
#include <binary.h>
#include <vector.h>
#include <matrix.h>

namespace SPUC {
class 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 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 ---------------------

smat wcdma_spreading_codes(int SF);
}
#endif // __sequence_h

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