標題: GDOP-Assisted Location Estimation Algorithms in Wireless Location Systems
作者: Chu, Lin-Chih
Tseng, Po-Hsuan
Feng, Kai-Ten
電信工程研究所
Institute of Communications Engineering
關鍵字: Wireless location estimation;geometric dilution of precision (GDOP);time-of-arrival (TOA)
公開日期: 2008
摘要: In recent years, wireless location estimation has attracted a significant amount of attention in different areas. The network-based location estimation schemes have been widely adopted based on the radio signals between the mobile station (MS) and the base stations (BSs). The two-step Least Square (LS) method has been studied in related research to provide efficient location estimation of the MS. However, the algorithm results in inaccurate location estimation under the circumstances with poor geometric dilution of precision (GDOP). In this paper, the GDOP-assisted location estimation (GOLE) schemes are proposed by considering the geometric relationships between the MS and its associated BSs. According to the minimal GDOP criterion, the BSs are fictitiously repositioned and are served as a new set of BSs within the formulation of the two-step LS algorithm. The proposed GOLE schemes can both preserve the computational efficiency from the two-step LS method and obtain precise location estimation under poor GDOP environments. Comparing with other existing schemes, numerical results demonstrate that the proposed GOLE algorithms can achieve better accuracy in wireless location estimation.
URI: http://hdl.handle.net/11536/30743
http://dx.doi.org/10.1109/GLOCOM.2008.ECP.1032
ISBN: 978-1-4244-2324-8
ISSN: 1930-529X
DOI: 10.1109/GLOCOM.2008.ECP.1032
期刊: GLOBECOM 2008 - 2008 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE
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