Covariance Shaping Least-Squares Location Estimation Using TOA Measurements

Authors:
Ann-Chen Chang;Chin-Min Chung
Affiliations:
The author is with the Department of Information Technology, Ling Tung University, Taichung, Taiwan 408, R.O.C. E-mail: acchang@mail.ltu.edu.tw,;The author is with Communications, Electronics, and Information Division, Army Command Headquarters, Taoyuan, Taiwan 335, R.O.C.
Venue:
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Year:
2007

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Abstract

Localization of mobile terminals has received considerable attention in wireless communications. In this letter, we present a covariance shaping least squares (CSLS) estimator using time-of-arrival measurements of the signal from the mobile station received at three or more base stations. It is shown that the CSLS estimator yields better performance than the other LS estimators at low signal-to-noise ratio conditions.