NDLI: Doppler-adaptive multipath window tracking for WCDMA FDD-uplink

Content Provider	IEEE Xplore Digital Library
Author	Held, I. Klein, O.
Copyright Year	2002
Description	Author affiliation: R&D Radio Commun., Ericsson Eurolab Deutschland GmbH, Nuremberg, Germany (Held, I.; Klein, O.)
Abstract	A dynamic RAKE diversity combiner used in the 3rd Generation Partnership Project (3GPP) UTRA FDD (WCDMA) uplink (UL) mobile communication system includes a path searcher to estimate time delays of channel taps to be coherently combined. Due to varying propagation delay between mobile and base station, the channel taps change their position over time. The path searcher has to track these changes by adapting its search window. This paper describes the concept of adaptive window tracking algorithms (WTA) and presents different approaches for position adaptation of the search window with emphasis on the required search window size - a major index for implementation complexity of the path searcher. In addition, it introduces a novel Doppler-adaptive WTA and compares the behavior of the different algorithms by means of tracking accuracy, tracking speed, and required search window size. The simulation studies show that the proposed Doppler-adaptive algorithm reduces the implementation complexity, significantly.
Starting Page	713
Ending Page	717
File Size	357242
Page Count	5
File Format	PDF
ISBN	0780374843
DOI	10.1109/VTC.2002.1002579
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-05-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Delay effects Diversity reception Delay estimation Propagation delay Base stations RAKE receivers Matched filters Wideband Multipath channels
Content Type	Text
Resource Type	Article

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