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/* -*- c++ -*- */
/*
* Copyright 2004,2011 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_ANALOG_PLL_FREQDET_CF_H
#define INCLUDED_ANALOG_PLL_FREQDET_CF_H
#include <analog/api.h>
#include <gr_sync_block.h>
namespace gr {
namespace analog {
/*!
* \brief Implements a PLL which locks to the input frequency and outputs
* an estimate of that frequency. Useful for FM Demod.
* \ingroup sync_blk
*
* Input stream 0: complex
* Output stream 0: float
*
* This PLL locks onto a [possibly noisy] reference carrier on
* the input and outputs an estimate of that frequency in radians per sample.
* All settings max_freq and min_freq are in terms of radians per sample,
* NOT HERTZ. The loop bandwidth determins the lock range and should be set
* around pi/200 -- 2pi/100.
* \sa pll_refout_cc, pll_carriertracking_cc
*/
class ANALOG_API pll_freqdet_cf : virtual public gr_sync_block
{
public:
// gr::analog::pll_freqdet_cf::sptr
typedef boost::shared_ptr<pll_freqdet_cf> sptr;
/* \brief Make PLL block that outputs the tracked signal's frequency.
*
* \param loop_bw: control loop's bandwidth parameter.
* \param max_freq: maximum (normalized) frequency PLL will lock to.
* \param min_freq: minimum (normalized) frequency PLL will lock to.
*/
static sptr make(float loop_bw, float max_freq, float min_freq);
virtual void set_loop_bandwidth(float bw) = 0;
virtual void set_damping_factor(float df) = 0;
virtual void set_alpha(float alpha) = 0;
virtual void set_beta(float beta) = 0;
virtual void set_frequency(float freq) = 0;
virtual void set_phase(float phase) = 0;
virtual void set_min_freq(float freq) = 0;
virtual void set_max_freq(float freq) = 0;
virtual float get_loop_bandwidth() const = 0;
virtual float get_damping_factor() const = 0;
virtual float get_alpha() const = 0;
virtual float get_beta() const = 0;
virtual float get_frequency() const = 0;
virtual float get_phase() const = 0;
virtual float get_min_freq() const = 0;
virtual float get_max_freq() const = 0;
};
} /* namespace analog */
} /* namespace gr */
#endif /* INCLUDED_ANALOG_PLL_FREQDET_CF_H */
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