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/* -*- 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 */
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