naa a22 4500 510792057 CHVBK 20180411083323.0 cr unu---uuuuu 180411e20130801xx s 000 0 eng 10.1007/s11277-012-0934-6 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0934-6 Access Point Height Based Location Accuracy Characterization in LOS and OLOS Scenarios [Elektronische Daten] [Udaykumar Naik, Vishram Bapat] Location estimation in a wireless local area network (WLAN) using received signal strength indication (RSSI) has gained considerable attention in recent years. In a conventional RSSI based indoor WLAN localization, mobile node position is estimated through access point (AP) placed at ceiling height. Researchers have proposed solutions for location estimation in line of sight (LOS) scenarios, by installing the AP at a fixed position. This paper demonstrates the improved location accuracy in LOS and obstructed line of sight (OLOS) scenarios by placing the AP at lower heights. The RSSI variations caused by shadow fading for changing AP heights are used to estimate the location accuracy. The localization performance is computed in terms of Cramer-Rao lower bound (CRLB) of range estimate under dynamic environments which is relatively less complex computation technique and is calibration free. Simulation results reveal that the proposed method has better performance than the multilateration with linearization for access point localization algorithm. The minimum mean localization errors are obtained by deploying the access point at 2 m height. The results also demonstrate that the indoor localization accuracy improves for higher order path loss exponent. Springer Science+Business Media New York, 2012 Indoor localization nationallicence RSSI nationallicence CRLB nationallicence LOS nationallicence Access point height nationallicence Naik Udaykumar Department of Electronics and Communication Engineering, K.L.E. Society's College of Engineering and Technology, Belgaum, India aut Bapat Vishram Ganga Institute of Technology and Management, Jhajjar, Haryana, India aut Wireless Personal Communications Springer US; http://www.springer-ny.com 71/3(2013-08-01), 2247-2258 0929-6212 71:3<2247 2013 71 11277 https://doi.org/10.1007/s11277-012-0934-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0934-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Naik Udaykumar Department of Electronics and Communication Engineering, K.L.E. Society's College of Engineering and Technology, Belgaum, India aut NATIONALLICENCE 700 1- Bapat Vishram Ganga Institute of Technology and Management, Jhajjar, Haryana, India aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 71/3(2013-08-01), 2247-2258 0929-6212 71:3<2247 2013 71 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer