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Comparison of TDOA Location Algorithms for Indoor UWB Positioning  

Kong Hyonmin (Department of Information and Communications Engineering, Chungnam National University)
Sung Taekyung (Electronics Radio, Information and Communications Engineering, Chungnam National University)
Kwon Youngmi (Electronics Radio, Information and Communications Engineering, Chungnam National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.42, no.1, 2005 , pp. 9-15 More about this Journal
Abstract
Most of location systems use RF signal. Because multipath is too severe at indoor environment, RF signal are usually used in outdoor positioning such as GPS. To overcome the difficulty at indoor positioning, m positioning is recently developed and is being vigorously studied. Some standardizations on UWB are in progress at IEEE 802.15 committee. In developing UWB positioning system, we should consider the synchronization of sensor network, positioning algorithm, sensor allocation, and so on. This paper presents a comparison of TDOA positioning algorithms that are widely used in location systems. Two algorithms are compared; one is derived by linearization, and the other is by analytic solution(CH algorithm). Simulation results show that the CH algorithm is superior to the linearized least square at indoor environment in that CH algorithm shows consistent positioning performance regardless of the visibility and geometry of basestations.
Keywords
UWB Location; TDOA; Indoor Positioning;
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