An Information-Based Approach to Precision Analysis of Indoor WLAN Localization Using Location Fingerprint

Entropy

Mu Zhou¹  Feng Qiu¹  Zengshan Tian¹  Haibo Wu²  Qiao Zhang¹  Wei He¹ 

[1] Chongqing Key Lab of Mobile Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;China Internet Research Lab, Computer Network Information Center, Chinese Academy of Sciences, Beijing 100190, China;

关键词: WLAN localization;    access point placement;    location fingerprint;    Fisher information;    simulated annealing;   

DOI  :  10.3390/e17127859

来源: mdpi

【 摘 要 】

In this paper, we proposed a novel information-based approach to precision analysis of indoor wireless local area network (WLAN) localization using location fingerprint. First of all, by using the Fisher information matrix (FIM), we derive the fundamental limit of WLAN fingerprint-based localization precision considering different signal distributions in characterizing the variation of received signal strengths (RSSs) in the target environment. After that, we explore the relationship between the localization precision and access point (AP) placement, which can provide valuable suggestions for the design of the highly-precise localization system. Second, we adopt the heuristic simulated annealing (SA) algorithm to optimize the AP locations for the sake of approaching the fundamental limit of localization precision. Finally, the extensive simulations and experiments are conducted in both regular line-of-sight (LOS) and irregular non-line-of-sight (NLOS) environments to demonstrate that the proposed approach can not only effectively improve the WLAN fingerprint-based localization precision, but also reduce the time overhead.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.