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/* -*- c++ -*- */
/*
* Copyright 2006,2011,2012,2014 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_COSTAS_LOOP_CC_IMPL_H
#define INCLUDED_DIGITAL_COSTAS_LOOP_CC_IMPL_H
#include <gnuradio/digital/costas_loop_cc.h>
namespace gr {
namespace digital {
class costas_loop_cc_impl : public costas_loop_cc
{
private:
const int d_order;
float d_error;
float d_noise;
/*! \brief the phase detector circuit for 8th-order PSK loops.
*
* \param sample complex sample
* \return the phase error
*/
float phase_detector_8(gr_complex sample) const; // for 8PSK
/*! \brief the phase detector circuit for fourth-order loops.
*
* \param sample complex sample
* \return the phase error
*/
float phase_detector_4(gr_complex sample) const; // for QPSK
/*! \brief the phase detector circuit for second-order loops.
*
* \param sample a complex sample
* \return the phase error
*/
float phase_detector_2(gr_complex sample) const; // for BPSK
/*! \brief the phase detector circuit for 8th-order PSK
* loops. Uses tanh instead of slicing and the noise estimate
* from the message port to estimated SNR of the samples.
*
* \param sample complex sample
* \return the phase error
*/
float phase_detector_snr_8(gr_complex sample) const; // for 8PSK
/*! \brief the phase detector circuit for fourth-order
* loops. Uses tanh instead of slicing and the noise estimate
* from the message port to estimated SNR of the samples.
*
* \param sample complex sample
* \return the phase error
*/
float phase_detector_snr_4(gr_complex sample) const; // for QPSK
/*! \brief the phase detector circuit for second-order
* loops. Uses tanh instead of slicing and the noise estimate
* from the message port to estimated SNR of the samples.
*
* \param sample a complex sample
* \return the phase error
*/
float phase_detector_snr_2(gr_complex sample) const; // for BPSK
typedef float (costas_loop_cc_impl::*d_phase_detector_t)(gr_complex sample) const;
static d_phase_detector_t choose_phase_detector(int order, bool use_snr);
const d_phase_detector_t d_phase_detector;
public:
costas_loop_cc_impl(float loop_bw, int order, bool use_snr = false);
~costas_loop_cc_impl();
float error() const;
void handle_set_noise(pmt::pmt_t msg);
void setup_rpc();
int work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items);
};
} /* namespace digital */
} /* namespace gr */
#endif /* INCLUDED_DIGITAL_COSTAS_LOOP_CC_IMPL_H */
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