Stephen Wolfe
9cf628359b
reorganizes viterbi decoder source so that each implementation resides in a separate file.
89 lines
2.4 KiB
C++
89 lines
2.4 KiB
C++
/*
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* Copyright (C) 2016 Bastian Bloessl <bloessl@ccs-labs.org>
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*
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* This program 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 of the License, or
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* (at your option) any later version.
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*
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* This program 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 program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INCLUDED_IEEE802_11_FRAME_EQUALIZER_IMPL_H
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#define INCLUDED_IEEE802_11_FRAME_EQUALIZER_IMPL_H
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#include <ieee802-11/frame_equalizer.h>
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#include <ieee802-11/constellations.h>
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#include "equalizer/base.h"
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#include "viterbi_decoder/viterbi_decoder.h"
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namespace gr {
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namespace ieee802_11 {
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class frame_equalizer_impl : virtual public frame_equalizer
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{
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public:
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frame_equalizer_impl(Equalizer algo, double freq, double bw, bool log, bool debug);
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~frame_equalizer_impl();
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void set_algorithm(Equalizer algo);
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void set_bandwidth(double bw);
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void set_frequency(double freq);
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void forecast (int noutput_items, gr_vector_int &ninput_items_required);
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int general_work(int noutput_items,
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gr_vector_int &ninput_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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private:
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bool parse_signal(uint8_t *signal);
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bool decode_signal_field(uint8_t *rx_bits);
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void deinterleave(uint8_t *rx_bits);
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equalizer::base *d_equalizer;
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gr::thread::mutex d_mutex;
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std::vector<gr::tag_t> tags;
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bool d_debug;
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bool d_log;
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int d_current_symbol;
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viterbi_decoder d_decoder;
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// freq offset
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double d_freq; // Hz
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double d_freq_offset_from_synclong; // Hz, estimation from "sync_long" block
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double d_bw; // Hz
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double d_er;
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double d_epsilon0;
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gr_complex d_prev_pilots[4];
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int d_frame_bytes;
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int d_frame_symbols;
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int d_frame_encoding;
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uint8_t d_deinterleaved[48];
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gr_complex symbols[48];
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boost::shared_ptr<gr::digital::constellation> d_frame_mod;
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constellation_bpsk::sptr d_bpsk;
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constellation_qpsk::sptr d_qpsk;
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constellation_16qam::sptr d_16qam;
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constellation_64qam::sptr d_64qam;
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static int interleaver_pattern[48];
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};
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} // namespace ieee802_11
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} // namespace gr
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#endif /* INCLUDED_IEEE802_11_FRAME_EQUALIZER_IMPL_H */
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