Physical Modeling and Performance Bounds for Device-free Localization Systems

In this letter, an analytically tractable model based on diffraction theory is proposed to describe the perturbations of the electromagnetic propagation of radio signals caused by the presence of a moving object in the two-dimensional (2-D) area near the transmitting/receiving devices. This novel model is instrumental to the evaluation of non-cooperative device-free localization (DFL) systems as it allows to relate the received signal strength measurements of multiple radio links to the object size, orientation and position. The proposed model is validated experimentally using radio devices and it is used to derive closed-form fundamental limits to DFL accuracy, providing an analytical tool for DFL system design and network 2-D pre-deployment assessment.

[1]  Jens Zander,et al.  A body-shadowing model for indoor radio communication environments , 1998 .

[2]  Rodney G. Vaughan,et al.  A statistical basis for lognormal shadowing effects in multipath fading channels , 1998, IEEE Trans. Commun..

[3]  Sailes K. Sengijpta.  Fundamentals of Statistical Signal Processing: Estimation Theory , 1995 .

[4]  Z. H. Hu,et al.  Characterisation of narrowband communication channels on the human body at 2.45 GHz , 2010 .

[5]  Monica Nicoli,et al.  A Bayesian Approach to Device-Free Localization: Modeling and Experimental Assessment , 2014, IEEE Journal of Selected Topics in Signal Processing.

[6]  Benjamin R. Hamilton,et al.  Propagation Modeling for Radio Frequency Tomography in Wireless Networks , 2014, IEEE Journal of Selected Topics in Signal Processing.

[7]  B. A. Davis,et al.  Diffraction by a randomly rough knife edge , 2002 .

[8]  Irene A. Stegun,et al.  Handbook of Mathematical Functions. , 1966 .

[9]  Moustafa Youssef,et al.  Synthetic Generation of Radio Maps for Device-Free Passive Localization , 2011, 2011 IEEE Global Telecommunications Conference - GLOBECOM 2011.

[10]  Michael Cheffena.  Physical-statistical channel model for signal effect by moving human bodies , 2012, EURASIP J. Wirel. Commun. Netw..

[11]  R. Luebbers.  Finite conductivity uniform GTD versus knife edge diffraction in prediction of propagation path loss , 1984 .

[12]  P. Lazaridis,et al.  Comparative study of lateral profile knife-edge diffraction and ray tracing technique using GTD in urban environment , 1999 .

[13]  Philippe De Doncker,et al.  Ultra-wideband channel model for communication around the human body , 2006, IEEE Journal on Selected Areas in Communications.

[14]  George Koutitas,et al.  Multiple Human Effects in Body Area Networks , 2010, IEEE Antennas and Wireless Propagation Letters.

[15]  Moustafa Youssef,et al.  CoSDEO 2016 Keynote: A decade later — Challenges: Device-free passive localization for wireless environments , 2007, 2016 IEEE International Conference on Pervasive Computing and Communication Workshops (PerCom Workshops).

[16]  Neal Patwari,et al.  RF Sensor Networks for Device-Free Localization: Measurements, Models, and Algorithms , 2010, Proceedings of the IEEE.

[17]  Moustafa Youssef,et al.  Nuzzer: A Large-Scale Device-Free Passive Localization System for Wireless Environments , 2009, IEEE Transactions on Mobile Computing.

[18]  G.D. Durgin.  The Practical Behavior of Various Edge-Diffraction Formulas , 2009, IEEE Antennas and Propagation Magazine.

[19]  L. Talbi,et al.  A Conducting Cylinder for Modeling Human Body Presence in Indoor Propagation Channel , 2007, IEEE Transactions on Antennas and Propagation.

[20]  Moustafa Youssef,et al.  Ichnaea: A Low-Overhead Robust WLAN Device-Free Passive Localization System , 2014, IEEE Journal of Selected Topics in Signal Processing.

[21]  K. Woyach,et al.  Sensorless Sensing in Wireless Networks: Implementation and Measurements , 2006, 2006 4th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks.

[22]  Hoi-Jun Yoo,et al.  The Human Body Characteristics as a Signal Transmission Medium for Intrabody Communication , 2007, IEEE Transactions on Microwave Theory and Techniques.