Indoor positioning based on radio signal strength distribution modeling using mirror image method

Authors:
Yaemi Teramoto;Akiko Sato;Akinori Asahara;Hitoshi Tomita
Affiliations:
Hitachi, Ltd., Central Research Laboratory, Kokubunji-shi, Tokyo, Japan;Hitachi, Ltd., Central Research Laboratory, Kokubunji-shi, Tokyo, Japan;Hitachi, Ltd., Central Research Laboratory, Kokubunji-shi, Tokyo, Japan;Hitachi, Ltd., Total Solutions Division, Chiyoda-ku, Tokyo, Japan
Venue:
Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Indoor Spatial Awareness
Year:
2011

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Abstract

Aiming to solve one of the serious problems of radio-signal strength (RSS) indoor positioning (namely, fluctuation of RSS values due to reflective waves), a novel indoor-positioning method based on RSS distribution modeling (called "RSS distribution modeling using the mirror-image method," RD-MMI), was developed and evaluated. With RDMMI, a model of RSS distribution is created by using measured RSS and considering reflective waves. RDMMI achieves an average positioning error of 4 m, which is better than that of conventional nearest-neighbor and trilateration methods by 50 to 60%. Furthermore, it accomplishes average positioning error of 5.4 m even with a small number of non-uniformly placed RSS measurements.