/* -*- c++ -*- */ /* * Copyright 2004,2011,2012 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_CLOCK_RECOVERY_MM_CC_H #define INCLUDED_DIGITAL_CLOCK_RECOVERY_MM_CC_H #include <digital/api.h> #include <gr_block.h> namespace gr { namespace digital { /*! * \brief Mueller and Müller (M&M) based clock recovery block with complex input, complex output. * \ingroup sync_blk * \ingroup digital * * This implements the Mueller and Müller (M&M) discrete-time * error-tracking synchronizer. * * The complex version here is based on: Modified Mueller and * Muller clock recovery circuit: * * G. R. Danesfahani, T.G. Jeans, "Optimisation of modified Mueller * and Muller algorithm," Electronics Letters, Vol. 31, no. 13, 22 * June 1995, pp. 1032 - 1033. */ class DIGITAL_API clock_recovery_mm_cc : virtual public gr_block { public: // gr::digital::clock_recovery_mm_cc::sptr typedef boost::shared_ptr<clock_recovery_mm_cc> sptr; /*! * Make a M&M clock recovery block. * * \param omega Initial estimate of samples per symbol * \param gain_omega Gain setting for omega update loop * \param mu Initial estimate of phase of sample * \param gain_mu Gain setting for mu update loop * \param omega_relative_limit limit on omega */ static sptr make(float omega, float gain_omega, float mu, float gain_mu, float omega_relative_limit); virtual float mu() const = 0; virtual float omega() const = 0; virtual float gain_mu() const = 0; virtual float gain_omega() const = 0; virtual void set_verbose(bool verbose) = 0; virtual void set_gain_mu (float gain_mu) = 0; virtual void set_gain_omega (float gain_omega) = 0; virtual void set_mu (float mu) = 0; virtual void set_omega (float omega) = 0; }; } /* namespace digital */ } /* namespace gr */ #endif /* INCLUDED_DIGITAL_CLOCK_RECOVERY_MM_CC_H */