/* -*- c++ -*- */ /* * Copyright 2011,2012 Free Software Foundation, Inc. * * This file is part of GNU Radio * * GNU Radio is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3, or (at your option) * any later version. * * GNU Radio is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with GNU Radio; see the file COPYING. If not, write to * the Free Software Foundation, Inc., 51 Franklin Street, * Boston, MA 02110-1301, USA. */ #ifndef INCLUDED_DIGITAL_KURTOTIC_EQUALIZER_CC_H #define INCLUDED_DIGITAL_KURTOTIC_EQUALIZER_CC_H #include <gnuradio/digital/api.h> #include <gnuradio/sync_decimator.h> namespace gr { namespace digital { /*! * \brief Implements a kurtosis-based adaptive equalizer on complex stream * \ingroup equalizers_blk * * \details * Warning: This block does not yet work. * * "Y. Guo, J. Zhao, Y. Sun, "Sign kurtosis maximization based blind * equalization algorithm," IEEE Conf. on Control, Automation, * Robotics and Vision, Vol. 3, Dec. 2004, pp. 2052 - 2057." */ class DIGITAL_API kurtotic_equalizer_cc : virtual public sync_decimator { protected: virtual gr_complex error(const gr_complex &out) = 0; virtual void update_tap(gr_complex &tap, const gr_complex &in) = 0; public: // gr::digital::kurtotic_equalizer_cc::sptr typedef boost::shared_ptr<kurtotic_equalizer_cc> sptr; static sptr make(int num_taps, float mu); virtual float gain() const = 0; virtual void set_gain(float mu) = 0; }; } /* namespace digital */ } /* namespace gr */ #endif /* INCLUDED_DIGITAL_KURTOTIC_EQUALIZER_CC_H */