NDLI: LOS estimation in overlapped multipath WCDMA scenarios via adaptive threshold

Content Provider	IEEE Xplore Digital Library
Author	Lohan, E.-S. Lakhzouri, A. Renfors, M.
Copyright Year	2004
Description	Author affiliation: Inst. of Commun. Eng., Tampere Univ. of Technol., Finland (Lohan, E.-S.; Lakhzouri, A.; Renfors, M.)
Abstract	Mobile positioning is a topic of high interest in current mobile communication systems. The position location is usually derived from the estimates of the distances between mobile and the base stations, which are obtained from the time-of-arrival of the line-of-sight (LOS) component. In time-varying multipath fading channels, the LOS component is not always present, and even when it is present, it might be obstructed by one or several components arriving within short delay (i.e., shorter than the width of the main lobe of the pulse shaping function). This situation of overlapped paths is one of the main sources of error in LOS estimation. We introduce here an adaptive threshold for estimating the LOS component in the presence of overlapped multipath components for wideband CDMA (WCDMA) positioning applications. Our threshold technique is used in conjunction with Teager-Kaiser (TK) based delay estimation. The TK estimator was previously introduced in the context of RAKE receiver and it was shown to be an efficient method for solving closely spaced multipaths.
Starting Page	353
Ending Page	357
File Size	376584
Page Count	5
File Format	PDF
ISBN	078037858X
DOI	10.1109/SPAWC.2003.1318981
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-06-15
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Base stations Fading Mobile communication Pulse shaping methods Estimation error Wideband Delay estimation Signal processing Automation
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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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