The effect of atmospheric ducts on the propagation of AIS signals

被引：0
作者：
Tang W. [1 ]
Cha H. [1 ]
Wei M. [2 ]
Tian B. [1 ]
机构：
[1] College of Electronic Engineering, Naval University of Engineering, Wuhan
[2] The Unit 31003 of PLA, Beijing
来源：
Australian Journal of Electrical and Electronics Engineering | 2019年 / 16卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Atmospheric duct; automatic identification system; parabolic equation; radio propagation;
D O I：
10.1080/1448837X.2019.1622491
中图分类号：
学科分类号：
摘要：
Electromagnetic wave propagates abnormally under atmospheric duct conditions. It is very important to study the influence of atmospheric duct on the radio propagation of the shipborne automatic identification system (AIS). AIS is a maritime navigation safety communication system that operates in the very high frequency (VHF) maritime mobile band and was developed primarily for collision avoidance. When AIS signals propagating in the atmospheric duct, the trapping effect can extend the signal range beyond the line-of-sight. In this work, the transmission of AIS signals under atmospheric duct conditions is modelled using the parabolic equation method. The simulation results demonstrate that both standard surface duct and surface-based duct can extend the detection range of AIS, whereas surface-based duct shows higher trapping capabilities over the standard surface duct. The results can be implemented to improve maritime situation awareness. © 2019, © 2019 Engineers Australia.
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页码：111 / 116
页数：5
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