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Filters
Computation of the lock-in ranges of phase-locked loops with PI filter
2016
IFAC-PapersOnLine
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Analytical approach based on the methods of phase plane analysis is applied to estimate the lock-in ranges of the circuits under consideration. ...
Analytical approach based on the methods of phase plane analysis is applied to estimate the lock-in ranges of the circuits under consideration. ...
The consideration of a filter with small parameter (Alexandrov et al., 2014) allows one to integrate separatrices and to estimate the lock-in range. ...
doi:10.1016/j.ifacol.2016.07.971
fatcat:s3gzqs35dnanbe3m3cy4ai6gdi
Real-time navigation using the global positioning system
1995
IEEE Aerospace and Electronic Systems Magazine
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We also formulate some new phase-locked loop (PLL) filter designs, and demonstrate their superiority over more conventional filters. ...
For more than a decade, TRW has been involved in aerospace applications of the Global Positioning System (GPS). ...
7 . 7 Probabilities of Loss of Lock and Cycle Slips for Various Phase-Locked Loop Methods
Real-Time Navigation Using the Global Positioning System velocity. ...
doi:10.1109/62.370460
fatcat:kwufdfoga5dabl2cqoumks5oua
Grid interface of solar PV transformer-less inverters using enhanced phase locked loop
2022
Global Journal of Engineering and Technology Advances
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This paper compares the frequency measurement and phase angle and voltage amplitude using simple phase locked loop system along with enhanced phase locked loop so that the enhanced phase locked loop (EPLL ...
) is proved to be giving superior performance over simple phase locked loop. ...
A high frequency transformer is used in case of DC-DC converters, on DC side otherwise a low frequency transformer in case of Inverter on AC side. ...
doi:10.30574/gjeta.2022.11.3.0095
fatcat:iqytaqgf6fas5lqipz3cvhdnxu
A New Fuzzy Bandwidth Carrier Recovery System in GPS for Robust Phase Tracking
2004
IEEE Signal Processing Letters
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A new digital phase-locked loop (DPLL) system incorporating a fuzzy bandwidth controller (FBC) is presented in this letter. ...
The FBC provides a time-varying bandwidth and adjusts the loop filter coefficients to improve DPLL tracking capability. ...
Based on the bandwidth-adjustment criterion, the proposed car- rier loop does achieve three better acquisition performances: 1) larger frequency ramp range (515 Hz/s); 2) wider lock range (100.2 Hz) and ...
doi:10.1109/lsp.2004.824020
fatcat:b373v7ifkrh2nfy7csesdse3rm
GPS Receiver VFLL-Assisted PLL High Dynamic Weak Signal Tracking Based on a Maximum Likelihood Estimation
2022
Applied Sciences
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This paper proposes a GPS receiver vector frequency-locked loop-assisted phase-locked loop (VFAPLL) structure based on the maximum likelihood estimation (MLE) method for highly dynamic weak-signal scenarios ...
The proposed VFAPLL is compared with the VFAPLL implemented based on the extended Kalman filter (EKF) algorithm and the frequency locked loop assisted phase locked loop (FAPLL) implemented based on MLE ...
Conclusions In this paper, a VFLL-assisted PLL for global navigation satellite system (GNSS) receivers based on maximum likelihood estimation was proposed. ...
doi:10.3390/app122412907
fatcat:sw3jeod3y5e6lnmpq5sdq74eke
Solution of the Gardner problem on the lock-in range of phase-locked loop
[article]
2017
arXiv
pre-print
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The lock-in frequency and lock-in range concepts were introduced in 1966 by Floyd Gardner to describe the frequency differences of phase-locked loop based circuit for which the loop can acquire lock within ...
The lock-in range and lock-in frequency computation is explained on the example of classical second-order PLL with lead-lag and active proportional-integral filters. ...
The authors would like to thank Roland Best, the founder of the Best Engineering Company (Oberwil, Switzerland) and the author of the bestseller on PLL-based circuits [18] for valuable discussion on ...
arXiv:1705.05013v1
fatcat:56k65wpzybdxfhvubgqzq4qkui
Frequency tracking loop with wide pull-in range for weak DSSS signal
2018
Electronics Letters
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A frequency tracking loop based on triangle function frequency discriminator and adaptive loop bandwidth adjustment is proposed to track the Doppler frequency of weak direct-sequence spread spectrum (DSSS ...
The proposed structure first provides a frequency discrimination with wide pull-in range to lock the large residual frequency offset after acquisition. ...
Introduction: The frequency-locked loop (FLL) is often employed to track the carrier frequency in global navigation satellite system (GNSS) receiver [1] . ...
doi:10.1049/el.2018.6631
fatcat:y5gftnreqjgs7lxggbv7ffae64
A Wide Range and High Swing Charge Pump for Phase Locked Loop in Phasor Measurement Unit
2019
2019 IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe)
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It is also capable to be used in a wide frequency range and low power applications. Keywords -charge pump, phase locked loop, phasor measurement unit, low power. ...
The synchronization is done by means of a phase locked oscillator inside PMU which uses clock signal of the Global Positioning System (GPS). ...
Block diagram of charge pump based phase locked loop (CPPLL) Fig. 3. ...
doi:10.1109/eeeic.2019.8783750
fatcat:pc3xrx2ivrglpeb54grvodtcbm
Mitigation of Ionosphere Scintillation Effects on Navigation Receiver using Kalman Filter Technique
2018
International Journal of Intelligent Engineering and Systems
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Signal tracking loop in GNSS receivers play a major role of data extraction by tracking carrier phase. ...
Under adverse signal conditions such as ionosphere scintillation, conventional tracking loops are less robust and hence are susceptible to loss of lock. ...
sight acceleration changes
Kalman filter based carrier tracking KF is basically a recursive algorithm, estimates the parameters of interest based on mean square error (MSE) method. ...
doi:10.22266/ijies2018.0430.17
fatcat:rlgjrgtuhngnnmluuugpptrqsy
A comparative Study and implementation of Single-Phase PLL techniques for Grid-Connected Inverters Systems
2018
Journal of Electrical Systems
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loop using four different methods, including, PLL with notch filter, PLL with notch filter based on fuzzy logic, PLL with a second-order generalized integrator filter (SOGI-PLL), PLL with a second-order ...
generalized integrator filter (SOGI-PLL) based on fuzzy logic. ...
Acknowledgment The authors would like to thank IRESEN (Moroccan Research Institute for Solar and New Energy) for the financial support of the research project on 6kVA inverters. ...
doaj:5341f9d625bf41feb416103a5094882c
fatcat:y2c3fgle7vdyzm7275idrhgrji
Genetic algorithms applied to phasor estimation and frequency tracking in PMU development
2013
International Journal of Electrical Power & Energy Systems
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This paper presents an efficient intelligent tool applied to phasor measurements and frequency tracking of fundamental components for PMU application. ...
The estimation task is modeled as an optimization problem in order to use genetic algorithms to search for optimal solutions. Very promising results are presented. ...
, algorithms based on the Least Error Squares method[14,15], the Phase Locked-Loop filters (PLLs)[16,17], as well as the Kalman filter[18,19].0142-0615/$ -see front matter Ó 2012 Elsevier Ltd. ...
doi:10.1016/j.ijepes.2012.07.070
fatcat:zjzi7kqkfnhvlcknwdew2ulfn4
Adaptive Inter-Loop Aiding for Performance Improvements in Low CNIR Environments
2010
Journal of Global Positioning Systems
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Use of Adaptive Kalman filtering is suggested as a possible solution to this problem and improves the situation by a further 2.5dB-Hz. ...
Locata, a terrestrial radio navigation system working on similar principles as GPS, can also make use of loop aiding techniques with some additional advantages. ...
Typically a KF either reduces noise in a loop filter's estimates or replaces the loop filter altogether to generate less noisy estimates. ...
doi:10.5081/jgps.9.1.41
fatcat:pszmdicbz5d7xe5wzjac6hyyje
A novel fine Doppler frequency acquisition algorithm for BDS‐3 B1C signal based on an adaptive filter
2021
IET radar, sonar & navigation
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Fine Doppler frequency estimation has an important role in accelerating the convergence of the tracking loop in a global navigation satellite system (GNSS) receiver to achieve short time to first fix. ...
Therefore, a fine Doppler frequency acquisition algorithm based on an adaptive filter is proposed, whose purpose is to acquire the BDS-3 B1C signal Doppler frequency accurately after the completion of ...
The third is based on the frequency locked loop (FLL) [10] . Although the FLL consumes less hardware resources, it takes a long time to converge. ...
doi:10.1049/rsn2.12104
fatcat:kceinkpvxnfwnlj5ooh5a6ynzi
Lock-in range of PLL-based circuits with proportionally-integrating filter and sinusoidal phase detector characteristic
[article]
2016
arXiv
pre-print
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For the lock-in range a rigorous mathematical definition is discussed. Numerical and analytical estimates for the lock-in range are obtained. ...
In the present work PLL-based circuits with sinusoidal phase detector characteristic and active proportionally-integrating (PI) filter are considered. ...
Best, the founder of the Best Engineering Company, Oberwil, Switzerland and the author of the bestseller on PLL-based circuits Best (2007) for valuable discussion. ...
arXiv:1603.08401v1
fatcat:vn5eqjaenjcnvepqbbdytqswk4
GPS Digital Tracking Loops Design for High Dynamic Launching Vehicles
2006
2006 IEEE Ninth International Symposium on Spread Spectrum Techniques and Applications
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We adopted the loop structure of a frequencylocked loop (FLL)-assisted phase-locked loop (PLL) and design it to track accelerations steps, as those occurring in launching vehicles. ...
This paper describes the design of digital tracking loops for GPS receivers in a high dynamics environment, without external aiding. ...
LOOP FILTER DESIGN The method to design the digital loop filters is based in an optimization process that poses the mentioned tradeoff in a quadratic functional which is minimized for a particular dynamic ...
doi:10.1109/isssta.2006.311730
fatcat:j5enz7gtlzhnxnjadfxlog6yz4
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