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Overview of multipath mitigation technology in global navigation satellite system

期刊

FRONTIERS IN PHYSICS
卷 10, 期 -, 页码 -

出版社

FRONTIERS MEDIA SA
DOI: 10.3389/fphy.2022.1071539

关键词

global navigation satellite system; multipath mitigation; new signal system; anti-multipath antenna; baseband signal processing; navigation data processing

资金

  1. National Natural Science Foundation of China
  2. [62003354]

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This paper introduces the impact of multipath signals on the positioning accuracy of the global navigation satellite system and summarizes the existing multipath mitigation technology, while prospecting the future development direction.
The global navigation satellite system is a high-precision radio navigation system based on artificial satellites. Among the factors affecting the positioning accuracy of the navigation satellite system, the multipath signal is the most significant and challenging to eliminate. Furthermore, the multipath environment of the receiver is also becoming more complex, and it seriously threatens the measurement accuracy and stability of the receiver. The multipath mitigation technology is also continuously improved and developed in practical application. This paper firstly introduces the concept and characteristics of multipath signals, and summarizes the influence of multipath signals on navigation satellite systems from two aspects of code tracking loop and carrier tracking loop. Furthermore, the existing multipath mitigation technology is summarized in four stages: signal system design, antenna design, baseband signal processing, and navigation data processing. Finally, according to the summary of the existing technology and the new demand, the future development direction of multipath suppression technology is prospected.

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