Title :
Robust location using system dynamics and motion constraints
Author :
Gentile, Camillo ; Klein-Berndt, Luke
Author_Institution :
Wireless Commun. Technol. Group, Nat. Inst. of Stand. & Technol., USA
Abstract :
To our knowledge, the indoor location system which currently achieves the best performance using inexpensive off-the-shelf equipment locates a mobile within 1.5 meters with probability 77% in hallways. Even while maintaining this accuracy, the system often reports logical errors such as the mobile in the wrong cubicle of an office or even on the wrong side of a wall when broadening the domain of application to within rooms. We propose an extension of the work using the same Markov localization framework, however incorporating system dynamics (necessitating no post-processing of the output) and motion constraints which implicitly encode the physical properties of the survey area. Our system retains the advantages of its predecessor of low cost, wireless LAN connectivity and security, and large-scale deployment, however extending the survey area from simple hallways to the whole office environment, while maintaining the same precision without logical errors.
Keywords :
Markov processes; constraint theory; indoor radio; mobile radio; office environment; probability; telecommunication security; wireless LAN; Markov localization framework; encoding; indoor location; logical error; motion constraint; off-the-shelf equipment; office environment; probability; survey area; system dynamic; wireless LAN connectivity; Area measurement; Base stations; Calibration; Costs; Fading; NIST; Niobium; Robustness; Security; Wireless LAN;
Conference_Titel :
Communications, 2004 IEEE International Conference on
Print_ISBN :
0-7803-8533-0
DOI :
10.1109/ICC.2004.1312734