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Clean-to-Composite Bound Ratio: A Multipath Criterion for GNSS Signal Design and Analysis
IEEE Transactions on Aerospace and Electronic Systems ( IF 4.4 ) Pub Date : 2022-05-03 , DOI: 10.1109/taes.2022.3172023
Corentin Lubeigt 1 , Lorenzo Ortega 2 , Jordi Vila-Valls 3 , Laurent Lestarquit 4 , Eric Chaumette 3
Affiliation  

Multipath is one of the most challenging propagation conditions affecting global navigation satellite systems (GNSS), which must be mitigated in order to obtain reliable navigation information. In any case, the random multipath nature makes it difficult to anticipate and overcome. Therefore, for legacy GNSS signal performance assessment, modern GNSS signal design, and future GNSS-based applications, robustness to multipath is a fundamental criterion. Different multipath metrics exist in the literature, such as the MPEE, usually leading to analyses only valid for a dedicated receiver/signal combination and only providing information on the bias. This article presents a general criterion to characterize the multipath robustness of a generic band-limited signal (e.g., GNSS or radar), considering the joint delay-Doppler and phase estimation. This criterion is based on the Cramér–Rao bound, which makes it universal, regardless of the receiver architecture and the signal under analysis, and provides information on the actual achievable performance in terms of estimated time-delay (i.e., pseudorange) and Doppler frequency variances.

中文翻译:

清洁复合边界比:GNSS 信号设计和分析的多径准则

多路径是影响全球导航卫星系统 (GNSS) 的最具挑战性的传播条件之一,必须加以缓解才能获得可靠的导航信息。在任何情况下,随机多径特性都使其难以预测和克服。因此,对于传统 GNSS 信号性能评估、现代 GNSS 信号设计和未来基于 GNSS 的应用,对多路径的鲁棒性是一个基本标准。文献中存在不同的多路径度量,例如 MPEE,通常导致分析仅对专用接收器/信号组合有效,并且仅提供有关偏差的信息。本文提出了一个通用标准,用于表征通用限带信号(例如 GNSS 或雷达)的多径鲁棒性,同时考虑联合延迟多普勒和相位估计。
更新日期:2022-05-03
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