基于信号到达角的船载WiFi室内定位影响因素分析  

Analysis of factors influencing the indoor location of WiFi on board based on the angle of arrival

作　　者：王国宇 刘克中[1,2,3] 陈默子 马杰[1,2] 曾旭明[1] WANG Guo-yu;LIU Ke-zhong;CHEN Mo-zi;MA Jie;ZENG Xu-ming(School of Navigation,Wuhan University of Technology,Wuhan 430063,China;Hubei Key Laboratory of Inland Navigation Technology,Wuhan University of Technology,Wuhan 430063,China;National Engineering Research Center for Water Transport Safety,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学航运学院,武汉430063 [2]武汉理工大学内河航运技术湖北省重点实验室,武汉430063 [3]武汉理工大学国家水运安全工程技术研究中心,武汉430063

出　　处：《大连海事大学学报》2020年第4期24-31,共8页Journal of Dalian Maritime University

基　　金：国家自然科学基金资助项目(51979216);湖北省技术创新专项重大项目(2017AAA120)。

摘　　要：为探究因船体材质、舱室空间形态及船舶运动对WiFi信号造成的严重的多径效应和噪声干扰而导致的现有基于WiFi信号的AoA室内定位方法在船舶环境中使用存在的局限性,在理论层面分析影响WiFi信号传播特性相关因素的基础上,通过实船测量研究内河大型客轮不同场景及航行状态对AoA测量值的影响,利用数据比对法重点分析船体材质、舱室空间形态及船舶运动对AoA测量值的影响程度.实验结果显示,狭窄船舶舱室空间对AoA测量精度的影响明显大于开阔船舶舱室空间,当收发装置距离6 m左右时,狭窄舱室相比开阔舱室,AoA测量偏移量增加15°~30°.研究同时表明,相同实验场景下,船舶运动或静止状态对AoA测量偏移影响相对较小,偏移范围一般在5°~12°.该结论为AoA室内定位系统工程研究与部署提供了依据.In order to explore the limitations of the existing WiFi Based AOA indoor positioning methods in the ship environment due to the serious multipath effect and noise interference caused by the hull material,cabin space shape and ship motion,on the basis of theoretical analysis of the relevant factors affecting WiFi signal transmission characteristics,the influence of different scenes and navigation conditions on AoA measurement value of large-scale inland river passenger ships was studied through real ship measurement,and the influence degree of hull material,cabin space shape and ship motion on AoA measurement value was analyzed by using data comparison method.The experimental results show that the influence of narrow ship cabin space on AoA measurement accuracy is significantly higher than that of open ship cabin space.When the distance between transmitter and receiver is about 6 m,AoA measurement offset in narrow cabin increases by 15°to 30°compared with open cabin.At the same time,the research also shows that the ship motion or static state has a relatively small impact on the AOA measurement offset in the same experimental scene,and the offset range is generally in the range of 5°to 12°.This conclusion provides a basis for the engineering research and deployment of AoA indoor positioning system.

关 键 词：智能交通 船载环境 船载WiFi 室内定位 信号到达角(AoA) 实验研究 

分 类 号：U675.79[交通运输工程—船舶及航道工程]