RLLL.h

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/* This file is part of gbLAB.
 *
 * gbLAB is distributed without any warranty under the MIT License.
 */
 
 
#ifndef gbLAB_RLLL_h_
#define gbLAB_RLLL_h_
 
#include <iostream>
#include <iomanip>
#include <cfloat> // FLT_EPSILON
#include "Eigen/Dense"
 
namespace oILAB {
 
class RLLL { /* Ying Hung Gan, Cong Ling, Complex Lattice Reduction Algorithm
              * for Low-Complexity Full-Diversity MIMO Detection IEEE
              * TRANSACTIONS ON SIGNAL PROCESSING, VOL. 57, NO. 7, JULY 2009
              */
 
  typedef Eigen::MatrixXd MatrixType;
  typedef Eigen::VectorXd VectorType;
 
  MatrixType B;
  Eigen::Matrix<long long int, Eigen::Dynamic, Eigen::Dynamic> U;
 
  /**********************************************************************/
  void update(VectorType &H, MatrixType &M, const int &k);
  /**********************************************************************/
  void size_reduce(MatrixType &M, const int &k, const int &j);
 
public:
  /**********************************************************************/
  RLLL(const MatrixType &B0, const double &delta);
 
  /**********************************************************************/
  const MatrixType &reducedBasis() const;
  /**********************************************************************/
  const Eigen::Matrix<long long int, Eigen::Dynamic, Eigen::Dynamic> &
  unimodularMatrix() const;
        
    };
 
    } // namespace oILAB
#endif