Authors: JuHyeon Seong EunChang Choi JangSe Lee DongHoan Seo
Publish Date: 2016/09/03
Volume: 94, Issue: 3, Pages: 1105-1121
Abstract
WiFibased fingerprint indoor localization is widely used owing to its low cost and the rapid increase of its network even though this method requires radio map creation and maintenance which accompany timeconsuming and continuous monitoring Considering these advantages and limitations and the fact that conditions in a ship are more likely to suffer from scattered and distorted wireless signals caused by a special structure of ship this paper presents an efficient shipboard positioning technique using existing shipboard WiFi network and additional ultrawide band UWB nodes which are the IEEE 802154a modules capable of precise positioning The proposed method can reduce computational complexity that can occur during signal acquisition and automatically create and update more rapid and precise modified radio maps by fusing the distance information obtained from UWB and WiFi fingerprint In addition the advantages of proposed system are that selective computation technique which can remove weak signals is applied to reduce the amount of computation needed to create modified radio map and the positioning errors can be improved by assigning a positioning weight to each preceding position value because the same signal intensities can occur in other areas within the WiFi network The efficiency of the proposed method and its comparison with other methods are demonstrated
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