gnss-sdr/src/algorithms/tracking/libs/tracking_FLL_PLL_filter.h

62 lines
1.9 KiB
C++

/*!
* \file tracking_FLL_PLL_filter.h
* \brief Interface of a hybrid FLL and PLL filter for tracking carrier loop
* \author Javier Arribas, 2011. jarribas(at)cttc.es
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2018 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR 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 of the License, or
* (at your option) any later version.
*
* GNSS-SDR 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 GNSS-SDR. If not, see <https://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef GNSS_SDR_TRACKING_FLL_PLL_FILTER_H_
#define GNSS_SDR_TRACKING_FLL_PLL_FILTER_H_
/*!
* \brief This class implements a hybrid FLL and PLL filter for tracking carrier loop
*/
class Tracking_FLL_PLL_filter
{
public:
void set_params(float fll_bw_hz, float pll_bw_hz, int order);
void initialize(float d_acq_carrier_doppler_hz);
float get_carrier_error(float FLL_discriminator, float PLL_discriminator, float correlation_time_s);
Tracking_FLL_PLL_filter();
~Tracking_FLL_PLL_filter();
private:
// FLL + PLL filter parameters
int d_order;
float d_pll_w;
float d_pll_w0p3;
float d_pll_w0f2;
float d_pll_x;
float d_pll_a2;
float d_pll_w0f;
float d_pll_a3;
float d_pll_w0p2;
float d_pll_b3;
float d_pll_w0p;
};
#endif