/* -*- 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. */ #ifndef INCLUDED_DIGITAL_OFDM_SERIALIZER_VCC_H #define INCLUDED_DIGITAL_OFDM_SERIALIZER_VCC_H #include <digital/api.h> #include <gr_tagged_stream_block.h> #include <digital/ofdm_carrier_allocator_cvc.h> namespace gr { namespace digital { /*! * \brief Serializes complex modulations symbols from OFDM sub-carriers * \ingroup ofdm_blk * * This is the inverse block to the carrier_allocator_cvc. It outputs the * complex data symbols as a tagged stream, discarding the pilot symbols. * * If given, two different tags are parsed: The first key (\p len_tag_key) * specifies the number of OFDM symbols in the frame at the input. The * second key (\p packet_len_tag_key) specifies the number of complex symbols * that are coded into this frame. If given, this second key is then used * at the output, otherwise, \p len_tag_key is used. * If both are given, the packet length specifies the maximum number of * output items, and the frame length specifies the exact number of * consumed input items. * * Input: Complex vectors of length \p fft_len * Output: Complex scalars, in the same order as specified in occupied_carriers. */ class DIGITAL_API ofdm_serializer_vcc : virtual public gr_tagged_stream_block { public: typedef boost::shared_ptr<ofdm_serializer_vcc> sptr; /*! * \param fft_len FFT length * \param occupied_carriers See ofdm_carrier_allocator_cvc. * \param len_tag_key The key of the tag identifying the length of the input frame in OFDM symbols. * \param packet_len_tag_key The key of the tag identifying the number of complex symbols in this packet. * \param symbols_skipped If the first symbol is not allocated as in \p occupied_carriers[0], set this * \param input_is_shifted If the input has the DC carrier on index 0 (i.e. it is not FFT shifted), set this to false */ static sptr make( int fft_len, const std::vector<std::vector<int> > &occupied_carriers, const std::string &len_tag_key="frame_len", const std::string &packet_len_tag_key="", int symbols_skipped=0, bool input_is_shifted=true ); /*! * \param allocator The carrier allocator block of which this shall be the inverse * \param packet_len_tag_key The key of the tag identifying the number of complex symbols in this packet. * \param symbols_skipped If the first symbol is not allocated as in \p occupied_carriers[0], set this * \param input_is_shifted If the input has the DC carrier on index 0 (i.e. it is not FFT shifted), set this to false */ static sptr make( const gr::digital::ofdm_carrier_allocator_cvc::sptr &allocator, const std::string &packet_len_tag_key="", int symbols_skipped=0, bool input_is_shifted=true ); }; } // namespace digital } // namespace gr #endif /* INCLUDED_DIGITAL_OFDM_SERIALIZER_VCC_H */