NDLI: Adding diversity to multi-user downlink beamforming by using BER constraints

Content Provider	IEEE Xplore Digital Library
Author	Zanatta Filho, D. Fety, L. Romano, J.M.T.
Copyright Year	2006
Description	Author affiliation: State Univ. of Campinas, Campinas (Zanatta Filho, D.)
Abstract	In this work, we propose a novel structure and criterion for joint transmit diversity and multi-user downlink beamforming. The proposed structure can be seen as an extension of the purely spatial downlink beamforming and is a transformation that, for each user, transforms K real antennas into L virtual antennas, with L les K. Classical transmit diversity is then applied to these virtual antennas. We propose a design criterion to optimize the precoders in order to find the best trade-off between minimizing the interference generated towards the other users and maximizing the channel diversity for the desired user. This criterion is based on the minimization of the total transmit power subjected to a target BER constraint for each user. Applied to a multiple-antenna transmitter, the proposed technique outperforms the purely-spatial downlink beamformer by about 5 dB for a target BER of $10^{-2}$ in a simple scenario.
Starting Page	672
Ending Page	677
File Size	543286
Page Count	6
File Format	PDF
ISBN	9788589748049
DOI	10.1109/ITS.2006.4433358
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-09-03
Publisher Place	Brazil
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Downlink Array signal processing Bit error rate Transmitting antennas Mobile antennas Interference constraints Transmitters Design optimization Spatial filters Signal processing antenna correlation Minimum BER Multi-User Multiple antennas Smart antennas MIMO downlink beamforming transmit diversity channel correlation
Content Type	Text
Resource Type	Article

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