GNU Radio 3.5.3.2 C++ API
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00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2004,2006,2011 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_PLL_CARRIERTRACKING_CC_H 00024 #define INCLUDED_GR_PLL_CARRIERTRACKING_CC_H 00025 00026 #include <gr_core_api.h> 00027 #include <gr_sync_block.h> 00028 #include <gri_control_loop.h> 00029 00030 class gr_pll_carriertracking_cc; 00031 typedef boost::shared_ptr<gr_pll_carriertracking_cc> gr_pll_carriertracking_cc_sptr; 00032 00033 GR_CORE_API gr_pll_carriertracking_cc_sptr gr_make_pll_carriertracking_cc (float loop_bw, 00034 float max_freq, 00035 float min_freq); 00036 /*! 00037 * \brief Implements a PLL which locks to the input frequency and outputs the 00038 * input signal mixed with that carrier. 00039 * \ingroup sync_blk 00040 * 00041 * input: stream of complex; output: stream of complex 00042 * 00043 * This PLL locks onto a [possibly noisy] reference carrier on 00044 * the input and outputs that signal, downconverted to DC 00045 * 00046 * All settings max_freq and min_freq are in terms of radians per sample, 00047 * NOT HERTZ. The loop bandwidth determins the lock range and should be set 00048 * around pi/200 -- 2pi/100. 00049 * \sa gr_pll_freqdet_cf, gr_pll_carriertracking_cc 00050 */ 00051 00052 class GR_CORE_API gr_pll_carriertracking_cc : public gr_sync_block, public gri_control_loop 00053 { 00054 friend GR_CORE_API gr_pll_carriertracking_cc_sptr gr_make_pll_carriertracking_cc (float loop_bw, 00055 float max_freq, 00056 float min_freq); 00057 00058 float d_locksig,d_lock_threshold; 00059 bool d_squelch_enable; 00060 gr_pll_carriertracking_cc (float loop_bw, float max_freq, float min_freq); 00061 00062 int work (int noutput_items, 00063 gr_vector_const_void_star &input_items, 00064 gr_vector_void_star &output_items); 00065 private: 00066 float mod_2pi (float in); 00067 float phase_detector(gr_complex sample,float ref_phase); 00068 public: 00069 bool lock_detector(void); 00070 bool squelch_enable(bool); 00071 float set_lock_threshold(float); 00072 }; 00073 00074 #endif