diff options
| author | Johnathan Corgan <johnathan@corganlabs.com> | 2013-06-14 07:16:49 -0700 |
|---|---|---|
| committer | Johnathan Corgan <johnathan@corganlabs.com> | 2013-06-14 07:16:49 -0700 |
| commit | 72776a40ae93c785dc527dd7ba0204716cc45b1a (patch) | |
| tree | b5d4944441f4fe7976270d8809354fec242e9d9f /gr-digital/include/digital | |
| parent | e7342b0d1ffad4a1c6a6f42717cfe46187df57a8 (diff) | |
digital: remove stray header file from earlier merge
Diffstat (limited to 'gr-digital/include/digital')
| -rw-r--r-- | gr-digital/include/digital/ofdm_chanest_vcvc.h | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/gr-digital/include/digital/ofdm_chanest_vcvc.h b/gr-digital/include/digital/ofdm_chanest_vcvc.h deleted file mode 100644 index da9479399a..0000000000 --- a/gr-digital/include/digital/ofdm_chanest_vcvc.h +++ /dev/null @@ -1,97 +0,0 @@ -/* -*- c++ -*- */ -/* - * Copyright 2013 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_OFDM_CHANEST_VCVC_H -#define INCLUDED_DIGITAL_OFDM_CHANEST_VCVC_H - -#include <digital/api.h> -#include <gr_block.h> - -namespace gr { - namespace digital { - - /*! - * \brief Estimate channel and coarse frequency offset for OFDM from preambles - * \ingroup ofdm_blk - * \ingroup syncronizers_blk - * - * Input: OFDM symbols (in frequency domain). The first one (or two) symbols are expected - * to be synchronisation symbols, which are used to estimate the coarse freq offset - * and the initial equalizer taps (these symbols are removed from the stream). - * The following \p n_data_symbols are passed through unmodified (the actual equalisation - * must be done elsewhere). - * Output: The data symbols, without the synchronisation symbols. - * The first data symbol passed through has two tags: - * 'ofdm_sync_carr_offset' (integer), the coarse frequency offset as number of carriers, - * and 'ofdm_sync_eq_taps' (complex vector). - * Any tags attached to the synchronisation symbols are attached to the first data - * symbol. All other tags are propagated as expected. - * - * Note: The vector on ofdm_sync_eq_taps is already frequency-corrected, whereas the rest is not. - * - * This block assumes the frequency offset is even (i.e. an integer multiple of 2). - * - * [1] Schmidl, T.M. and Cox, D.C., "Robust frequency and timing synchronization for OFDM", - * Communications, IEEE Transactions on, 1997. - * [2] K.D. Kammeyer, "Nachrichtenuebertragung," Chapter. 16.3.2. - */ - class DIGITAL_API ofdm_chanest_vcvc : virtual public gr_block - { - public: - typedef boost::shared_ptr<ofdm_chanest_vcvc> sptr; - - /*! - * \param sync_symbol1 First synchronisation symbol in the frequency domain. Its length must be - * the FFT length. For Schmidl & Cox synchronisation, every second sub-carrier - * has to be zero. - * \param sync_symbol2 Second synchronisation symbol in the frequency domain. Must be equal to - * the FFT length, or zero length if only one synchronisation symbol is used. - * Using this symbol is how synchronisation is described in [1]. Leaving this - * empty forces us to interpolate the equalizer taps. - * If you are using an unusual sub-carrier configuration (e.g. because of OFDMA), - * this sync symbol is used to identify the active sub-carriers. If you only - * have one synchronisation symbol, set the active sub-carriers to a non-zero - * value in here, and also set \p force_one_sync_symbol parameter to true. - * \param n_data_symbols The number of data symbols following each set of synchronisation symbols. - * Must be at least 1. - * \param eq_noise_red_len If non-zero, noise reduction for the equalizer taps is done according - * to [2]. In this case, it is the channel influence time in number of - * samples. A good value is usually the length of the cyclic prefix. - * \param max_carr_offset Limit the number of sub-carriers the frequency offset can maximally be. - * Leave this zero to try all possibilities. - * \param force_one_sync_symbol See \p sync_symbol2. - */ - static sptr make( - const std::vector<gr_complex> &sync_symbol1, - const std::vector<gr_complex> &sync_symbol2, - int n_data_symbols, - int eq_noise_red_len=0, - int max_carr_offset=-1, - bool force_one_sync_symbol=false - ); - }; - - } // namespace digital -} // namespace gr - -#endif /* INCLUDED_DIGITAL_OFDM_CHANEST_VCVC_H */ - |