GNU Radio 3.5.1 C++ API
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00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2004,2011 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_REFOUT_CC_H 00024 #define INCLUDED_GR_PLL_REFOUT_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_refout_cc; 00031 typedef boost::shared_ptr<gr_pll_refout_cc> gr_pll_refout_cc_sptr; 00032 00033 GR_CORE_API gr_pll_refout_cc_sptr gr_make_pll_refout_cc (float loop_bw, 00034 float max_freq, float min_freq); 00035 /*! 00036 * \brief Implements a PLL which locks to the input frequency and outputs a carrier 00037 * \ingroup sync_blk 00038 * 00039 * input: stream of complex; output: stream of complex 00040 * 00041 * This PLL locks onto a [possibly noisy] reference carrier on 00042 * the input and outputs a clean version which is phase and frequency 00043 * aligned to it. 00044 * 00045 * All settings max_freq and min_freq are in terms of radians per sample, 00046 * NOT HERTZ. The loop bandwidth determins the lock range and should be set 00047 * around pi/200 -- 2pi/100. 00048 * \sa gr_pll_freqdet_cf, gr_pll_carriertracking_cc 00049 */ 00050 class GR_CORE_API gr_pll_refout_cc : public gr_sync_block, public gri_control_loop 00051 { 00052 friend GR_CORE_API gr_pll_refout_cc_sptr gr_make_pll_refout_cc (float loop_bw, 00053 float max_freq, float min_freq); 00054 00055 gr_pll_refout_cc (float loop_bw, float max_freq, float min_freq); 00056 00057 int work (int noutput_items, 00058 gr_vector_const_void_star &input_items, 00059 gr_vector_void_star &output_items); 00060 private: 00061 float mod_2pi (float in); 00062 float phase_detector(gr_complex sample, float ref_phase); 00063 }; 00064 00065 #endif