Mitigating anomalous measurements for indoor wireless local area network positioning. Issue 7 (1st August 2016)

• Record Type: Journal Article
• Authors: Morales, Jafet; Akopian, David; Agaian, Sos
• Is Part Of: IET radar, sonar & navigation. Volume 10:Issue 7(2016)
• Page Start: 1220
• Page End: 1227
• Publication Date: 2016-08-01
• Subjects: indoor navigation -- indoor radio -- wireless LAN -- mobility management (mobile radio); indoor wireless local area network positioning -- WLAN access points -- indoor positioning methods -- location sensitive -- wireless signals -- location‐dependent received signal strength measurements -- RSS measurements -- signal reception -- WLAN localisation algorithms -- anomalous measurements mitigation; Signal processing -- Periodicals; Radar -- Periodicals; Sonar -- Periodicals; Electronics in navigation -- Periodicals; Navigation -- Periodicals; 621.3848
• DOI: 10.1049/iet-rsn.2015.0479
• Languages: English
• ISSNs: 1751-8784

Abstract

Abstract : Indoor positioning methods using location‐sensitive features of available wireless signals can achieve high accuracy. In particular, many state‐of‐the‐art methods exploit quite unique sets of location‐dependent received signal strength (RSS) measurements from multiple wireless local area network (WLAN) access points (APs), also called as wireless fingerprints. However, reception of signals from WLAN APs is not often stable, and RSS measurements tend to be unavailable due to WLAN card or AP transient effects, limited sensitivity of WLAN cards, and fluctuating attenuation and reflection of signals due to a multipath environment, structural changes and moving objects. In certain hostile scenarios, bogus APs may be installed to disorient WLAN localisation algorithms. In this study, two approaches are proposed to mitigate the impact of faulty signal strength measurements. Performance figures are provided for both simulated and empirical environments in order to support conclusions.