Innovative Indoor Geolocation Using RF Multipath Diversity

D. E. Gustafson, J. M. Elwell and J. A. Soltz

Abstract:	A new concept is presented for indoor geolocation in multipath environments where direct paths are sometimes undetectable. In contrast to previous statistically-based approaches, the multipath delays are modeled using a geometry-based argument. Assuming a series of specular reflections off of planar surfaces, the model contains a maximum of three unknown multipath parameters per path which may be estimated when geolocation accuracy is sufficiently high. If some of the direct paths subsequently become undetectable, it is possible under certain conditions to maintain geolocation accuracy using only the indirect path length measurements. The new concept is illustrated via simulation using a relatively simple representative scenario. Performance is compared to a traditional method which uses only direct path measurements, indicating the potential for significantly improved indoor geolocation accuracy in environments dominated by multipath. Since the estimated multipath parameters are geometry-dependent, this approach allows the possibility of building up indoor map information as the geolocation process commences.
Published in:	Proceedings of IEEE/ION PLANS 2006 April 25 - 27, 2006 Loews Coronado Resort Hotel San Diego, CA
Pages:	904 - 912
Cite this article:	Gustafson, D. E., Elwell, J. M., Soltz, J. A., "Innovative Indoor Geolocation Using RF Multipath Diversity," Proceedings of IEEE/ION PLANS 2006, San Diego, CA, April 2006, pp. 904-912. https://doi.org/10.1109/PLANS.2006.1650690
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