Thomas Kolb
cd9784efb6
- correct_frequency: Correct frequency by averaging the phase drift on
the preamble
- freq_est_lr: Luise & Reggiannini frequency estimator
- pid_controller: a PID controller that takes error values at the input
and generates steering values at the output
The combination of freq_est_lr and PID controller can be used together
with an NCO (signal source) to create a closed control loop for
frequency offset compensation.
57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
/* -*- c++ -*- */
|
|
/*
|
|
* Copyright 2019 Thomas Kolb.
|
|
*
|
|
* This is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 3, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This software is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this software; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, Inc., 51 Franklin Street,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
|
|
#ifndef INCLUDED_HAMNET70_CORRECT_FREQUENCY_H
|
|
#define INCLUDED_HAMNET70_CORRECT_FREQUENCY_H
|
|
|
|
#include <hamnet70/api.h>
|
|
#include <gnuradio/sync_block.h>
|
|
|
|
namespace gr {
|
|
namespace hamnet70 {
|
|
|
|
/*!
|
|
* \brief <+description of block+>
|
|
* \ingroup hamnet70
|
|
*
|
|
*/
|
|
class HAMNET70_API correct_frequency : virtual public gr::sync_block
|
|
{
|
|
public:
|
|
typedef boost::shared_ptr<correct_frequency> sptr;
|
|
|
|
/*!
|
|
* \brief Return a shared_ptr to a new instance of hamnet70::correct_frequency.
|
|
*
|
|
* To avoid accidental use of raw pointers, hamnet70::correct_frequency's
|
|
* constructor is in a private implementation
|
|
* class. hamnet70::correct_frequency::make is the public interface for
|
|
* creating new instances.
|
|
*/
|
|
static sptr make(const std::vector<gr_complex> &symbols);
|
|
};
|
|
|
|
} // namespace hamnet70
|
|
} // namespace gr
|
|
|
|
#endif /* INCLUDED_HAMNET70_CORRECT_FREQUENCY_H */
|
|
|