無線區域網路環境下定位技術之效能分析

本研究利用802.11g及802.11b規格之無線網卡，在室內環境比較多種定位技術之優劣，採用的定位方法包括NNSS, KNN, 重心法，Curve Fitting, Wiener Filtering等，我們探討了AP數目及連線速率對定位準確度之影響。實驗結果顯示，3個AP的定位結果優於2個AP。另外，在大部分情況下，802.11b的定位表現優於802.11g。整體而言，以802.11b的連線速率加上KNN定位法可獲得最好的定位效果。

關鍵字

802.11b ； 802.11g ；室內定位；無線區域網路； WLAN

並列摘要

This study compares the accuracy of various positioning techniques including NNSS, KNN, center of gravity, curve fitting, and Wiener filtering via indoor measurement by applying 802.11b and 802.11g wireless cards. The effects of number of access point (AP) and link rates on positioning accuracy are also investigated. Experimental results indicate that the accuracy of 3 sets of AP is better than that of 2 sets of AP, and the accuracy of 802.11b is better than that of the 802.11g in most cases. Finally, it is found that the KNN approach with 802.11b is among the best choice for indoor positioning.

並列關鍵字

802.11b ； 802.11g ； indoor positioning ； wireless local area network (WLAN)

參考文獻

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參考文獻