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   1 /* -*- c++ -*- */
   2 /*
   3  * Copyright 2006 Free Software Foundation, Inc.
   4  *
   5  * This file is part of GNU Radio
   6  *
   7  * GNU Radio is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2, or (at your option)
  10  * any later version.
  11  *
  12  * GNU Radio is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with GNU Radio; see the file COPYING.  If not, write to
  19  * the Free Software Foundation, Inc., 51 Franklin Street,
  20  * Boston, MA 02110-1301, USA.
  21  */
  22
  23 #ifndef INCLUDED_GR_OFDM_BPSK_MAPPER_H
  24 #define INCLUDED_GR_OFDM_BPSK_MAPPER_H
  25
  26
  27 #include <gr_sync_block.h>
  28 #include <gr_message.h>
  29 #include <gr_msg_queue.h>
  30 #include <vector>
  31
  32 class gr_ofdm_bpsk_mapper;
  33 typedef boost::shared_ptr<gr_ofdm_bpsk_mapper> gr_ofdm_bpsk_mapper_sptr;
  34
  35 gr_ofdm_bpsk_mapper_sptr
  36 gr_make_ofdm_bpsk_mapper (unsigned msgq_limit,
  37                           unsigned occupied_carriers, unsigned int fft_length,
  38                           const std::vector<gr_complex> &known_symbol1,
  39                           const std::vector<gr_complex> &known_symbol2);
  40
  41 /*!
  42  * \brief take a stream of bytes in and map to a vector of complex
  43  * constellation points suitable for IFFT input to be used in an ofdm
  44  * modulator.  Simple BPSK version.
  45  */
  46
  47 class gr_ofdm_bpsk_mapper : public gr_sync_block
  48 {
  49   friend gr_ofdm_bpsk_mapper_sptr
  50     gr_make_ofdm_bpsk_mapper (unsigned msgq_limit,
  51                               unsigned occupied_carriers, unsigned int fft_length,
  52                               const std::vector<gr_complex> &known_symbol1,
  53                               const std::vector<gr_complex> &known_symbol2);
  54
  55  protected:
  56   gr_ofdm_bpsk_mapper (unsigned msgq_limit,
  57                        unsigned occupied_carriers, unsigned int fft_length,
  58                        const std::vector<gr_complex> &known_symbol1,
  59                        const std::vector<gr_complex> &known_symbol2);
  60
  61  private:
  62   gr_msg_queue_sptr     d_msgq;
  63   gr_message_sptr       d_msg;
  64   unsigned              d_msg_offset;
  65   bool                  d_eof;
  66
  67   unsigned int d_occupied_carriers;
  68   unsigned int d_fft_length;
  69   unsigned int d_bit_offset;
  70   unsigned int d_header_sent;
  71   std::vector<gr_complex> d_known_symbol1, d_known_symbol2;
  72
  73  public:
  74   ~gr_ofdm_bpsk_mapper(void);
  75
  76   gr_msg_queue_sptr     msgq() const { return d_msgq; }
  77
  78   int work(int noutput_items,
  79            gr_vector_const_void_star &input_items,
  80            gr_vector_void_star &output_items);
  81
  82 };
  83
  84
  85 #endif