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An Improved Method of Moments Estimator for TOA Based Localization

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  • Estimation accuracy and computational complexity are two major areas of consideration for localization system design. For time-of-arrival based systems, the 1st-order method of moments (MOM) least-square (LS) estimator is simple to implement, but its performance is much worse than that of some computationally more complex estimators such as the MOM weighted LS (WLS) and nonlinear weighted LS (NLLS-WLS) estimators. In this paper, we develop an improved 1st-order MOM estimator to efficiently utilize the variances of the range measurements and the target position that, as the NLLS estimator, has a performance also approaching the Crammer-Rao lower bound but is much simpler than MOM-WLS and NLLS-WLS estimators.
  • This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by IEEE-Institute of Electrical and Electronics Engineers and can be found at: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4234. Article © 2013 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
  • Keywords: Location estimation and method of moments
  • Keywords: Location estimation and method of moments
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  • Qiao, T., & Liu, H. (2013). An improved method of moments estimator for TOA based localization. IEEE Communications Letters, 17(7), 1321-1324. doi:10.1109/LCOMM.2013.052413.130734
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  • 17
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  • 7
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  • This work was supported by the National Science Foundation under Grant IIS-1118017.
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