diff options
Diffstat (limited to 'gr-digital/lib/digital_ofdm_equalizer_simpledfe.cc')
| -rw-r--r-- | gr-digital/lib/digital_ofdm_equalizer_simpledfe.cc | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/gr-digital/lib/digital_ofdm_equalizer_simpledfe.cc b/gr-digital/lib/digital_ofdm_equalizer_simpledfe.cc deleted file mode 100644 index c6a05b9da8..0000000000 --- a/gr-digital/lib/digital_ofdm_equalizer_simpledfe.cc +++ /dev/null @@ -1,101 +0,0 @@ -/* -*- c++ -*- */ -/* Copyright 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. - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include "digital_ofdm_equalizer_simpledfe.h" - -digital_ofdm_equalizer_simpledfe_sptr -digital_make_ofdm_equalizer_simpledfe( - int fft_len, - const gr::digital::constellation_sptr &constellation, - const std::vector<std::vector<int> > &occupied_carriers, - const std::vector<std::vector<int> > &pilot_carriers, - const std::vector<std::vector<gr_complex> > &pilot_symbols, - int symbols_skipped, - float alpha, - bool input_is_shifted) -{ - return digital_ofdm_equalizer_simpledfe_sptr(new digital_ofdm_equalizer_simpledfe( - fft_len, - constellation, - occupied_carriers, - pilot_carriers, - pilot_symbols, - symbols_skipped, - alpha, - input_is_shifted)); -} - -digital_ofdm_equalizer_simpledfe::digital_ofdm_equalizer_simpledfe( - int fft_len, - const gr::digital::constellation_sptr &constellation, - const std::vector<std::vector<int> > &occupied_carriers, - const std::vector<std::vector<int> > &pilot_carriers, - const std::vector<std::vector<gr_complex> > &pilot_symbols, - int symbols_skipped, - float alpha, - bool input_is_shifted) - : digital_ofdm_equalizer_1d_pilots(fft_len, occupied_carriers, pilot_carriers, pilot_symbols, symbols_skipped, input_is_shifted), - d_constellation(constellation), - d_alpha(alpha) -{ -} - - -digital_ofdm_equalizer_simpledfe::~digital_ofdm_equalizer_simpledfe() -{ -} - - -void -digital_ofdm_equalizer_simpledfe::equalize(gr_complex *frame, - int n_sym, - const std::vector<gr_complex> &initial_taps, - const std::vector<gr_tag_t> &tags) -{ - if (!initial_taps.empty()) { - d_channel_state = initial_taps; - } - gr_complex sym_eq, sym_est; - - for (int i = 0; i < n_sym; i++) { - for (int k = 0; k < d_fft_len; k++) { - if (!d_occupied_carriers[k]) { - continue; - } - if (d_pilot_carriers.size() && d_pilot_carriers[d_pilot_carr_set][k-d_carr_offset]) { - d_channel_state[k] = d_alpha * d_channel_state[k] - + (1-d_alpha) * frame[i*d_fft_len + k] / d_pilot_symbols[d_pilot_carr_set][k-d_carr_offset]; - frame[i*d_fft_len+k] = d_pilot_symbols[d_pilot_carr_set][k-d_carr_offset]; - } else { - sym_eq = frame[i*d_fft_len+k] / d_channel_state[k]; - d_constellation->map_to_points(d_constellation->decision_maker(&sym_eq), &sym_est); - d_channel_state[k] = d_alpha * d_channel_state[k] + frame[i*d_fft_len+k] / sym_est; - frame[i*d_fft_len+k] = sym_est; - } - } - d_pilot_carr_set = (d_pilot_carr_set + 1) % d_pilot_carriers.size(); - } -} - |