Nonline-of-sight error mitigation in mobile location

Authors:
Li Cong;Weihua Zhuang
Affiliations:
Res. & Dev., UTStarcom, Hangzhou, China;-
Venue:
IEEE Transactions on Wireless Communications
Year:
2005

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Abstract

The location of mobile terminals has received considerable attention in the recent years. The performance of mobile location systems is limited by errors primarily caused by nonline-of-sight (NLOS) propagation conditions. We investigate the NLOS error identification and correction techniques for mobile user location in wireless cellular systems. Based on how much a priori knowledge of the NLOS error is available, two NLOS mitigation algorithms are proposed. Simulation results demonstrate that with the prior information database, the location estimate can be obtained with good accuracy even in severe NLOS propagation conditions.