Presented at GNSS 2004
The 2004 International Symposium on GNSS/GPS
Sydney, Australia
6–8 December 2004
Comparisons of TDOA Triangulation Solutions for
Indoor Positioning
Hyonmin Kong
Deptment of Information and Communications Engineering,
Chungnam National University,
220 Gung-dong, Yuseong-gu, Daejeon, 305-764, Korea
Tel: +82-42-821-7791 Fax: +82-42-823-5586 Email: hmkong@ cnu.ac.kr
Youngmi Kwon
Deptment of Information and Communications Engineering,
Chungnam National University,
220 Gung-dong, Yuseong-gu, Daejeon, 305-764, Korea
Tel: +82-42-821-6890 Fax: +82-42-823-5586 Email: [email protected]c.kr
Taekyung Sung
Deptment of Information and Communications Engineering,
Chungnam National University,
220 Gung-dong, Yuseong-gu, Daejeon, 305-764, Korea
Tel: +82-42-821-5660 Fax: +82-42-823-5586 Email: [email protected]
Hyonmin Kong
ABSTRACT
In most of the location systems, the RF signal is used as a transmission
medium. But, in the indoor environment, the multipath effect is very severe.
So, the RF signal is not adequate for indoor environment. Rather it is used in
the outdoor positioning such as in the GPS. To overcome the limitation of
indoor positioning, the UWB positioning is recently developed and is being
vigorously studied. Some standardizations on the UWB are in progress at
IEEE 802.15 committee. In developing the UWB positioning system, we
should consider the synchronization of sensor nodes, positioning algorithms,
arrangement of sensor nodes, and so on. This paper presents a comparison of
positioning algorithms that are widely used in the location systems. Two
algorithms are compared; the one algorithm is derived by a linearization
solution (LS algorithm), and the other algorithm is by analytic solution (CH
algorithm). Simulation results show that the CH algorithm is superior to the
linearized least square in the indoor environment. The CH algorithm shows
consistent with the positioning performance regardless of the visibility and
the geometry of basestations.
KEYWORDS:
UWB Location, Location algorithm, Indoor Positioning
