mirror of https://github.com/hb9fxq/gr-digitalhf
69 lines
2.4 KiB
C++
69 lines
2.4 KiB
C++
/* -*- c++ -*- */
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/*
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* Copyright 2018 hcab14@gmail.com.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef INCLUDED_DIGITALHF_DOPPLER_CORRECTION_CC_IMPL_H
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#define INCLUDED_DIGITALHF_DOPPLER_CORRECTION_CC_IMPL_H
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#include <gnuradio/blocks/rotator.h>
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#include <digitalhf/doppler_correction_cc.h>
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namespace gr {
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namespace digitalhf {
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class doppler_correction_cc_impl : public doppler_correction_cc
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{
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private:
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unsigned int _preamble_length; // length of preamble (in samples)
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unsigned int _preamble_length_cc; // length of the part of the preamble used for cross correlation (in samples)
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blocks::rotator _rotator;
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enum {
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WAIT_FOR_PHASE_EST_TAG, // wait for a tag from corr_est_cc
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WAIT_FOR_MSG, // wait for response from msg_proxy
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CONSUME_AND_INSERT_PREAMBLE_TAG, // insert a preamble tag (=doppler calculation was successful)
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CONSUME_AND_SKIP // do not intsert a tag and skip the samples (=doppler calculation was not successful)
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} _state;
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pmt::pmt_t _msg_metadata;
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pmt::pmt_t _port_name;
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float _phase_est; // phase from correlation
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float _amp_est_saved; // new amplitude correction
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float _amp_est; // currenlty applied amplitude correction
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public:
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doppler_correction_cc_impl(unsigned int preamble_length, unsigned int preamble_length_cc);
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virtual ~doppler_correction_cc_impl();
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void forecast(int noutput_items, gr_vector_int &ninput_items_required);
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int work(int noutput_items,
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gr_vector_const_void_star &input_items,
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gr_vector_void_star &output_items);
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bool stop();
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protected:
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void handle_message(pmt::pmt_t msg);
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};
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} // namespace digitalhf
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} // namespace gr
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#endif /* INCLUDED_DIGITALHF_DOPPLER_CORRECTION_CC_IMPL_H */
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