Mobile Location Using Improved Covariance Shaping Least-Squares Estimation in Cellular Systems

Ann-Chen CHANG  Yu-Hong LEE  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E92-A   No.9   pp.2366-2368
Publication Date: 2009/09/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E92.A.2366
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Digital Signal Processing
mobile location,  time-of-arrival,  covariance shaping least-squares,  non-line-of-sight,  variable loading,  

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This Letter deals with the problem of non-line-of-sight (NLOS) in cellular systems devoted to location purposes. In conjugation with a variable loading technique, we present an efficient technique to make covariance shaping least squares estimator has robust capabilities against the NLOS effects. Compared with other methods, the proposed improved estimator has high accuracy under white Gaussian measurement noises and NLOS effects.