Aug 2026· Infokommunikacionnye tehnologii· 0 citations· 10 references
Engineering
Abstract
Accuracy and intolerance to interference of GNSS receivers depend on the efficiency of tracking modules. To achieve better characteristics, designers should implement various issues, affecting the process of tracking in these modules: integration interval, spacing and configuration parameters of PLL and DLL. The article discusses practical issues concerning implementation of tracking modules. Using the obtained results, it is possible to improve transient characteristics of tracking modules. These issues were tested in an experimental navigation receiver. The results were obtained using the simulation software, developed by the authors, as well as Vivado simulator and experimental testing.
Using the phase of a signal as an informative parameter usually allows for the
highest efficiency of signal isolation from interference and the accuracy of estimating its parameters.
However, in some cases, in particular in conditions of intense interference and fluctuations in signal
parameters caused by the movement of a moving object, a decrease in the information content of the
phase caused by its "jumps" into neighboring phase cycles may cause a deterioration in the quality
of functioning of the equipment of radio engineering systems, which makes it advisable to exclude
the phase from the vector of measured parameters.
The study of this issue was carried out in the work by comparing the characteristics of
synchronization systems for communication and navigation equipment with phase and frequency
auto-tuning of the frequency of the reference oscillator. At the same time, it was assumed that the
equipment was located on a mobile object and operated in conditions of intense interference.
A. Nemykin, L. N. Isaeva· Legal and Applied Metrology· 0 citations
The proposed algorithm enables the development of universal navigation receivers with software-defined adaptability to Global Navigation Satellite Systems updates, significantly reducing hardware modernization costs.
A. Kozlov, A. M. Petushkov, E. A. Sakovsky et al.· Proceedings of Telecommunica...· 0 citations
An approach is proposed to improve accuracy through adaptive weighting strategies and multipath isolation techniques and this strategy is combined with a multipath detection technique using the Code-minus-carrier (CMC) rate of change.
S. Chiodini· Materials Research Proceedin...· 0 citations
Digital television signals received from a geostationary satellite can be used as signals of opportunity to calculate and predict the satellite orbit. This is an inexpensive and practical way to evaluate satellite collision risks, a key aspect of space surveillance and space safety. The technique is based on measuring the Time Difference of Arrival (TDoA) between pairs of tracking stations located across the satellite footprint, using a high-gain parabolic antenna and a signal digitiser. To calculate the TDoA accurately, the stations must timestamp the measurements according to a common time reference, which is achieved by using a GNSS receiver. Since the GNSS equipment setup can be different at each station (e.g., different cable lengths), it is necessary to calibrate the total GNSS chain delay and compensate for it. Also, the signal from the geostationary satellite itself undergoes a time delay as it travels across the tracking station hardware, which should also be accounted for. This paper describes GMV's Focusear passive tracking system, with an emphasis on signal delay calibration aspects.
R. Piriz, Francesc Vilardell Sallés, A. A. Maté· IEEE International Workshop...· 0 citations
Simultaneous use of pseudorange, phase and Doppler data from multiple GNSSs for Position, Velocity and Timing (PVT) requires the alignment of the time and frequency scales of the used GNSSs, and additional calibrations, some of them related to the different signal offsets. The accuracy of the PVT solution is also dependent on the GNSS constellation. However, a comparative analysis seems to be lacking, particularly for the joint use of global and regional constellations. The aim of this work is to study the interoperability of GNSSs and their performances (in particular for Galileo), concerning position, velocity and time. To do this, pseudorange and Doppler data from GPS, GLONASS, Galileo, BeiDou, QZSS, NAVIC and GAGAN recorded of a three-month period (July to September 2025) by ten permanent stations at different geographical locations are processed. We first investigate the alignment of the GNSSs time scales relative to GPS and show that the time scales have different relative offsets of up to several tens of nanoseconds, depending on the GNSS and on the receiver type. Then, the alignment in velocity and frequency is evaluated using Doppler data, and it is found out it is within fractions of cm/sec.
M. Pertile, Anna Fantoni, Joaquin Zurutuza et al.· IEEE International Workshop...· 0 citations
Global Positioning System (GPS) signals in the L1 band are inherently vulnerable to both intentional and unintentional jamming because of their low received power levels. In this study, the performance of three different adaptive filtering algorithms is investigated against five representative jammer types in a GPS L1 receiver employing a single-element patch antenna. The considered jammer types include continuous-wave, swept, pulsed, wideband, and Binary Phase Shift Keying (BPSK)-modulated interference. The evaluated algorithms comprise the Least Mean Squares (LMS), Recursive Least Squares (RLS), and Adaptive Notch Filter-based approaches. Simulation-based assessments are carried out in terms of signal-to-noise-and-interference ratio improvement, bit error rate, convergence speed, and computational complexity. The results indicate that each algorithm offers distinct performance advantages depending on the characteristics of the interfering signal.
Akın Can Özbaş, Yılmazcan Bekleviş, Mesut Erol et al.· Signal Processing and Commun...· 0 citations
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