NDLI: Direction estimation for cellular enhanced cell-ID positioning using multiple sector observations

Content Provider	IEEE Xplore Digital Library
Author	Jiyun Shen Oda, Y.
Copyright Year	2010
Description	Author affiliation: Research Laboratories, NTT DOCOMO, INC., 3-6 Hikari-no-oka, Yokosuka, Kanagawa 239-8536 Japan (Jiyun Shen; Oda, Y.)
Abstract	In this paper, we propose a method that estimates the direction of a set of User Equipment (UE) more accurately for Enhanced Cell-ID (ECID) positioning of a cellular system than the conventional sector based positioning method. The proposed method estimates the direction of the UE using the number of observations in reception sectors. The average received power ratio of the reception sectors is calculated using the observation results of the sector reception situation and antenna patterns of the reception sector are used to estimate the UE direction. This enables estimation of the direction from simply obtained information. The evaluation results of the proposed method are presented based on computer simulations of the direction accuracy and positioning accuracy. The improvement in the direction accuracy compared to the conventional method is approximately 65% (11°) in a Rayleigh fading environment when the number of observations is 10 and the width of sector is 60°. Round Trip Time (RTT) positioning accuracy is improved by approximately 50% (150 m) using the proposed method when the error in the RTT measurement is 156 m and the cell spacing is 4 km.
Starting Page	1
Ending Page	6
File Size	1625604
Page Count	6
File Format	PDF
ISBN	9781424458622
e-ISBN	9781424458653
DOI	10.1109/IPIN.2010.5647833
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-15
Publisher Place	Switzerland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Positioning Estimation Rayleigh channels GPS Enhanced Cell-ID Niobium UMTS Accuracy RTT Rician channels Directive antennas Cell-ID Location
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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