gr_costas_loop_cc.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 2, 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 
00024 #ifndef INCLUDED_GR_COSTAS_LOOP_CC_H
00025 #define INCLUDED_GR_COSTAS_LOOP_CC_H
00026 
00027 #include <gr_sync_block.h>
00028 #include <stdexcept>
00029 #include <fstream>
00030 
00031 class gr_costas_loop_cc;
00032 typedef boost::shared_ptr<gr_costas_loop_cc> gr_costas_loop_cc_sptr;
00033 
00034 gr_costas_loop_cc_sptr 
00035 gr_make_costas_loop_cc (float alpha, float beta,
00036                         float max_freq, float min_freq, 
00037                         int order
00038                         ) throw (std::invalid_argument);
00039 
00040 
00047 class gr_costas_loop_cc : public gr_sync_block
00048 {
00049   friend gr_costas_loop_cc_sptr gr_make_costas_loop_cc (float alpha, float beta,
00050                                                         float max_freq, float min_freq, 
00051                                                         int order
00052                                                         ) throw (std::invalid_argument);
00053 
00054   float d_alpha, d_beta, d_max_freq, d_min_freq, d_phase, d_freq;
00055   int d_order;
00056 
00057   gr_costas_loop_cc (float alpha, float beta,
00058                      float max_freq, float min_freq, 
00059                      int order
00060                      ) throw (std::invalid_argument);
00061 
00062   float phase_detector_4(gr_complex sample) const;    // for QPSK
00063   float phase_detector_2(gr_complex sample) const;    // for BPSK
00064   float (gr_costas_loop_cc::*d_phase_detector)(gr_complex sample) const;
00065 
00066 public:
00067 
00068   int work (int noutput_items,
00069             gr_vector_const_void_star &input_items,
00070             gr_vector_void_star &output_items);
00071 };
00072 
00073 #endif

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