GNU Radio 3.6.5.1 C++ API
gr_pll_carriertracking_cc.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2004,2006,2011 Free Software Foundation, Inc.
4  *
5  * This file is part of GNU Radio
6  *
7  * GNU Radio is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 3, or (at your option)
10  * any later version.
11  *
12  * GNU Radio is distributed in the hope that it will be useful,
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14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
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19  * the Free Software Foundation, Inc., 51 Franklin Street,
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21  */
22 
23 #ifndef INCLUDED_GR_PLL_CARRIERTRACKING_CC_H
24 #define INCLUDED_GR_PLL_CARRIERTRACKING_CC_H
25 
26 #include <gr_core_api.h>
27 #include <gr_sync_block.h>
28 #include <gri_control_loop.h>
29 
32 
34  float max_freq,
35  float min_freq);
36 /*!
37  * \brief Implements a PLL which locks to the input frequency and outputs the
38  * input signal mixed with that carrier.
39  *
40  * input: stream of complex; output: stream of complex
41  *
42  * This PLL locks onto a [possibly noisy] reference carrier on
43  * the input and outputs that signal, downconverted to DC
44  *
45  * All settings max_freq and min_freq are in terms of radians per sample,
46  * NOT HERTZ. The loop bandwidth determins the lock range and should be set
47  * around pi/200 -- 2pi/100.
48  * \sa gr_pll_freqdet_cf, gr_pll_carriertracking_cc
49  */
50 
52 {
54  float max_freq,
55  float min_freq);
56 
57  float d_locksig,d_lock_threshold;
58  bool d_squelch_enable;
59  gr_pll_carriertracking_cc (float loop_bw, float max_freq, float min_freq);
60 
61  int work (int noutput_items,
62  gr_vector_const_void_star &input_items,
63  gr_vector_void_star &output_items);
64 private:
65  float mod_2pi (float in);
66  float phase_detector(gr_complex sample,float ref_phase);
67 public:
68  bool lock_detector(void);
69  bool squelch_enable(bool);
70  float set_lock_threshold(float);
71 };
72 
73 #endif