sim_nco.hpp

/*xxx
* \brief nco - NCO with fixed point Q1.N accumulator
* \author maki
*/


#ifndef SIM_NCO_HPP
#define SIM_NCO_HPP

#include <itpp/itbase.h>
#include "sim\_sim_extension.hpp"


using namespace itpp;
using namespace std;

namespace SIM
{

class nco
{
  int Nq_bits;
  q63_t q_scale;
  q63_t acc;
  vec y0;

public:

  nco()
  {
    y0.set_length(2);
    y0(0) = 0.0;
    y0(1) = 0.0;
    Nq_bits = 31;
    q_scale = (q63_t)pow2(Nq_bits); // 2^31
    acc = 0;
  };

  ~nco()
  {
  };

  void set_N(int n);

  void set_acc(double a);

  void set_output(const vec &yout);

  int get_N();

  double get_acc();

  vec get_output();

  mat process(const bvec &ce, const vec &x);
};

}      // namespace SIM
#endif //SIM_NCO_HPP