Analysis of a Device-Free Passive Tracking System in Typical Wireless Environments

Device-free Passive (DfP) localization is a new concept in location determination where the tracked entity does not carry any device nor participate actively in the localization process. A DfP system operates by processing the received physical signal of a wireless transmitter at one or more monitoring points. The previously introduced DfP system was shown to enable the tracking of a single intruder with high accuracy in a highly controlled WLAN environment. In this paper, we propose and analyze different algorithms for DfP tracking in a typical indoor WLAN environment, rich in multipath. We also study the effect of the temporal and spatial changes in the environment on the accuracy of the system. In addition, we evaluate the effect of the different configurations of the wireless equipment placement on the DfP localization accuracy. Our results show that our proposed techniques can accurately track the user in typical environments, thus enabling a large number of DfP applications.

[1]  Moustafa Youssef,et al.  The Horus WLAN location determination system , 2005, MobiSys '05.

[2]  Paramvir Bahl,et al.  RADAR: an in-building RF-based user location and tracking system , 2000, Proceedings IEEE INFOCOM 2000. Conference on Computer Communications. Nineteenth Annual Joint Conference of the IEEE Computer and Communications Societies (Cat. No.00CH37064).

[3]  Eibe Frank,et al.  Evaluating the Replicability of Significance Tests for Comparing Learning Algorithms , 2004, PAKDD.

[4]  C. D. Kemp,et al.  Density Estimation for Statistics and Data Analysis , 1987 .

[5]  Hari Balakrishnan,et al.  6th ACM/IEEE International Conference on on Mobile Computing and Networking (ACM MOBICOM ’00) The Cricket Location-Support System , 2022 .

[6]  Moustafa Youssef,et al.  Smart cevices for smart environments: Device-free passive detection in real environments , 2009, 2009 IEEE International Conference on Pervasive Computing and Communications.

[7]  Hao Ling,et al.  Human Tracking Using Doppler Processing and Spatial Beamforming , 2007, 2007 IEEE Radar Conference.

[8]  J. Krumm,et al.  Multi-camera multi-person tracking for EasyLiving , 2000, Proceedings Third IEEE International Workshop on Visual Surveillance.

[9]  Per Enge,et al.  Special Issue on Global Positioning System , 1999, Proc. IEEE.

[10]  Moustafa Youssef,et al.  Small-scale compensation for WLAN location determination systems , 2003, 2003 IEEE Wireless Communications and Networking, 2003. WCNC 2003..

[11]  Gregory D. Abowd,et al.  The smart floor: a mechanism for natural user identification and tracking , 2000, CHI Extended Abstracts.

[12]  Andy Hopper,et al.  The active badge location system , 1992, TOIS.