Title :
Physical Modeling and Performance Bounds for Device-free Localization Systems
Author :
Rampa, Vittorio ; Savazzi, Stefano ; Nicoli, Monica ; D´Amico, Michele
Author_Institution :
Inst. of Electron., Comput. & Telecommun. Eng. (IEIIT), Rome, Italy
Abstract :
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.
Keywords :
electromagnetic wave diffraction; indoor radio; radio networks; radio receivers; radio transmitters; radiowave propagation; DFL system design; analytic tractable model; closed-form fundamental limits; diffraction theory; electromagnetic propagation perturbations; multiple radio links; network 2D predeployment assessment; noncooperative device-free localization systems; performance bounds; physical modeling; radio signals; received signal strength measurements; receiving devices; transmitting devices; Analytical models; Approximation methods; Computational modeling; Diffraction; Fading; Predictive models; Sensitivity; Cramer–Rao lower bound; device-free localization; human body shadowing; wireless sensor network;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2015.2438176
