GNU Radio 3.5.1 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_core_api.h>
00028 #include <gr_block.h>
00029 #include <vector>
00030 
00031 class gr_ofdm_bpsk_demapper;
00032 typedef boost::shared_ptr<gr_ofdm_bpsk_demapper> gr_ofdm_bpsk_demapper_sptr;
00033 
00034 GR_CORE_API gr_ofdm_bpsk_demapper_sptr 
00035 gr_make_ofdm_bpsk_demapper (unsigned int occupied_carriers);
00036 
00037 
00038 /*!
00039  * \brief take a vector of complex constellation points in from an FFT
00040  * and demodulate to a stream of bits. Simple BPSK version.
00041  * \ingroup ofdm_blk
00042  */
00043 class GR_CORE_API gr_ofdm_bpsk_demapper : public gr_block
00044 {
00045   friend GR_CORE_API gr_ofdm_bpsk_demapper_sptr
00046     gr_make_ofdm_bpsk_demapper (unsigned int occupied_carriers);
00047   
00048  protected:
00049   gr_ofdm_bpsk_demapper (unsigned int occupied_carriers);
00050   
00051  private:
00052   unsigned char slicer(gr_complex x);
00053 
00054   unsigned int d_occupied_carriers;
00055   unsigned int d_byte_offset;
00056   unsigned char d_partial_byte;
00057   
00058   void forecast(int noutput_items, gr_vector_int &ninput_items_required);
00059 
00060  public:
00061   ~gr_ofdm_bpsk_demapper(void);
00062   int general_work(int noutput_items,
00063                    gr_vector_int &ninput_items,
00064                    gr_vector_const_void_star &input_items,
00065                    gr_vector_void_star &output_items);
00066 };
00067 
00068 
00069 #endif