Journal of Positioning, Navigation, and Timing (J Position Navig Timing; JPNT)
Citation: Son, J., Song, Y.-J., Lee, S., & Won, J.-H., 2023, Choice of Efficient Sampling Rate for GNSS Signal Generation Simulators, Journal of Positioning, Navigation, and Timing, 12, 237-244.
Journal of Positioning, Navigation, and Timing (J Position Navig Timing) 2023 September, Volume 12, Issue 3, pages 237-244. https://doi.org/10.11003/JPNT.2023.12.3.237
Received on 19 July 2023, Revised on 07 August 2023, Accepted on 25 August 2023, Published on 30 September 2023.
License: Creative Commons Attribution Non-Commercial License (https://creativecommons.org/licenses/bync/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Jinseon Son1, Young-Jin Song1, Subin Lee1, Jong-Hoon Won2†
1Department of Electrical and Computer Engineering, Autonav Lab, Inha University Graduate School, Incheon 22212, Korea
2Department of Electrical Engineering, Inha University, Incheon 22212, Korea
†Corresponding Author: E-mail, jh.won@inha.ac.kr; Tel: +82-32-860-7406
A signal generation simulator is an economical and useful solution in Global Navigation Satellite System (GNSS) receiver design and testing. A software-defined radio approach is widely used both in receivers and simulators, and its flexible structure to adopt to new signals is ideally suited to the testing of a receiver and signal processing algorithm in the signal design phase of a new satellite-based navigation system before the deployment of satellites in space. The generation of highly accurate delayed sampled codes is essential for generating signals in the simulator, where its sampling rate should be chosen to satisfy constraints such as Nyquist criteria and integer and non-commensurate properties in order not to cause any distortion of original signals. A high sampling rate increases the accuracy of code delay, but decreases the computational efficiency as well, and vice versa. Therefore, the selected sampling rate should be as low as possible while maintaining a certain level of code delay accuracy. This paper presents the lower limits of the sampling rate for GNSS signal generation simulators. In the simulation, two distinct code generation methods depending on the sampling position are evaluated in terms of accuracy versus computational efficiency to show the lower limit of the sampling rate for several GNSS signals.
GNSS simulator, sampling rate, commensurability
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Son, J. and Won, J.-H. contributed to the design and implementation of the research, to the analysis of the results and to the writing of the manuscript. Conceptualization, Son, J. and Won, J.-H.; methodology, Son, J., Song, Y.-J. and Won, J.-H.; software, Son, J., Song, Y.-J and Lee, S.; formal analysis, Son, J.; investigation Son, J.; resources, Won, J.-H.; data curation, Son, J.; writing—original draft preparation, Son, J.; writing—review and editing, Son, J. and Won, J.H.; visualization, Son, J.; supervision, Won, J.-H.; project administration, Won, J.-H.; funding acquisition, Won, J.-H.
The authors declare no conflict of interest.