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Analysis of Multipath Characteristics of Quasi-Zenith Satellite System L5 Frequency Point
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Analysis of Multipath Characteristics of Quasi-Zenith Satellite System L5 Frequency Point
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Journal Article
Analysis of Multipath Characteristics of Quasi-Zenith Satellite System L5 Frequency Point
2025
Overview
The Quasi-Zenith Satellite System (QZSS) plays a pivotal role in providing vital navigation, positioning, timing, and signal authentication services, particularly through its L5 signal. Despite its importance, research on the performance of the L5 signal remains relatively limited. This study presents an empirical analysis of the L5 signal, identifying the distinct amplitude and phase distortion phenomena within its constellation diagram. Simulation methods are employed to replicate these observed anomalies, revealing that the L5 signal is significantly impacted by in-band inter-signal interference and the multipath effect at the satellite end of the star. A quantitative analysis is performed to investigate the underlying causes of these distortions, offering a deeper understanding of the factors contributing to the observed signal irregularities. The findings provide essential data and theoretical insights, contributing to the optimization of the QZSS signal quality and performance.
