NDLI: A hybrid SS-TOA wireless geolocation based on path attenuation under imperfect path loss exponent

Content Provider	IEEE Xplore Digital Library
Author	Valera Martinez, M.I. Sieskul, B.T. Feng Zheng Kaiser, T.
Copyright Year	2010
Description	Author affiliation: Sch. of Telecommun. Eng., Univ. Carlos III of Madrid, Leganés, Spain (Valera Martinez, M.I.) \|\| Inst. of Commun. Technol., Leibniz Univ. Hannover, Hannover, Germany (Sieskul, B.T.; Feng Zheng; Kaiser, T.)
Abstract	We consider the wireless geolocation using the time of arrival (ToA) of radio signals in a cellular setting. The main concern in this paper involves the effects of the error knowledge of the path loss exponent (PLE). We derive the asymptotic error performance of the maximum likelihood (ML) estimator under the imperfect PLE. We point out that a previous method provides inaccurate performance prediction and then present a new method based on the Taylor series expansion. Numerical examples illustrate that the Taylor analysis captures the bias and the error variance of the ML estimator under the imperfect PLE better than the conventional method. Simulation results also illustrate that in the threshold region, the ML estimator outperforms the MC estimator even in the presence of the PLE error. However, in the asymptotic region the MC estimator and the ML estimator with the perfect PLE outperform the ML estimator under the imperfect PLE.
Starting Page	681
Ending Page	685
File Size	411842
Page Count	5
File Format	PDF
ISSN	22195491
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-08-23
Publisher Place	Denmark
Access Restriction	Subscribed
Rights Holder	EUSIPCO
Subject Keyword	Wireless communication Maximum likelihood estimator Maximum likelihood estimation Time-of-arrival estimation Taylor series Attenuation Path loss exponent Signal to noise ratio
Content Type	Text
Resource Type	Article

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