NDLI: Closed loop mode 1 transmit diversity with high speed downlink packet access

Content Provider	IEEE Xplore Digital Library
Author	Kurjenniemi, J. Leino, J. Kaipainen, Y. Ristaniemi, T.
Copyright Year	2003
Description	Author affiliation: Dept. of Math. Inf. Technol., Jyvaskyla Univ., Finland (Kurjenniemi, J.; Leino, J.)
Abstract	In this paper we consider the performance of a closed loop mode 1 transmit diversity in WCDMA network when high speed downlink packet access (HSDPA) scheme is used. Motivation for the use of multiple antennas arises from the expected gains in the performance of a wireless link. In closed loop mode 1 technique base station uses a suitable weight, which corresponds to phase adjustment, for its second transmission antenna according to UE's feedback commands. The study of the effects of it to the system's performance in a dynamic environment is extremely crucial due to the fact that phase adjustment may lead to destructive combining or received phases due to mobility and feedback errors and, as a consequence, might even lead to performance losses rather than gains for the system. In this paper we study the effect of mobility, feedback errors and feedback delays to the system performance and draw conclusions about the achieved capacity gains/losses.
Sponsorship	China Inst. Commun. (CIC) Chinese Inst. Electron. (CIE)
Starting Page	757
Ending Page	761
File Size	525850
Page Count	5
File Format	PDF
ISBN	7563506861
DOI	10.1109/ICCT.2003.1209645
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-04-09
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	China Institute of Communications(CIC)
Subject Keyword	Downlink Performance gain Diversity reception Multiaccess communication System performance Base stations Transmitting antennas Antenna feeds Feedback loop Performance loss
Content Type	Text
Resource Type	Article

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