GNU Radio 3.4.0 C++ API
gr_ofdm_bpsk_demapper.h
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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2006 Free Software Foundation, Inc.
00004  * 
00005  * This file is part of GNU Radio
00006  * 
00007  * GNU Radio is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 3, or (at your option)
00010  * any later version.
00011  * 
00012  * GNU Radio is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  * 
00017  * You should have received a copy of the GNU General Public License
00018  * along with GNU Radio; see the file COPYING.  If not, write to
00019  * the Free Software Foundation, Inc., 51 Franklin Street,
00020  * Boston, MA 02110-1301, USA.
00021  */
00022 
00023 #ifndef INCLUDED_GR_OFDM_BPSK_DEMAPPER_H
00024 #define INCLUDED_GR_OFDM_BPSK_DEMAPPER_H
00025 
00026 
00027 #include <gr_block.h>
00028 #include <vector>
00029 
00030 class gr_ofdm_bpsk_demapper;
00031 typedef boost::shared_ptr<gr_ofdm_bpsk_demapper> gr_ofdm_bpsk_demapper_sptr;
00032 
00033 gr_ofdm_bpsk_demapper_sptr 
00034 gr_make_ofdm_bpsk_demapper (unsigned int occupied_carriers);
00035 
00036 
00037 /*!
00038  * \brief take a vector of complex constellation points in from an FFT
00039  * and demodulate to a stream of bits. Simple BPSK version.
00040  * \ingroup ofdm_blk
00041  */
00042 class gr_ofdm_bpsk_demapper : public gr_block
00043 {
00044   friend gr_ofdm_bpsk_demapper_sptr
00045     gr_make_ofdm_bpsk_demapper (unsigned int occupied_carriers);
00046   
00047  protected:
00048   gr_ofdm_bpsk_demapper (unsigned int occupied_carriers);
00049   
00050  private:
00051   unsigned char slicer(gr_complex x);
00052 
00053   unsigned int d_occupied_carriers;
00054   unsigned int d_byte_offset;
00055   unsigned char d_partial_byte;
00056   
00057   void forecast(int noutput_items, gr_vector_int &ninput_items_required);
00058 
00059  public:
00060   ~gr_ofdm_bpsk_demapper(void);
00061   int general_work(int noutput_items,
00062                    gr_vector_int &ninput_items,
00063                    gr_vector_const_void_star &input_items,
00064                    gr_vector_void_star &output_items);
00065 };
00066 
00067 
00068 #endif