NDLI: Joint TX-RX optimisation for MIMO-SDMA based on a null-space constraint

Content Provider	IEEE Xplore Digital Library
Author	Bourdoux, A. Khaled, N.
Copyright Year	2002
Description	Author affiliation: IMEC, Leuven, Belgium (Bourdoux, A.; Khaled, N.)
Abstract	We address the problem of transmission pre- and post-filtering in multi-user MIMO communications using SDMA. In this set-up, multiple antennas are used at the base station and at the terminals. A double level of spatial multiplexing is used: the users are spatially multiplexed (SDMA) and each user receives spatially multiplexed bit streams (SDM). Multi-user interference is a potential performance limitation in this scheme. To avoid this, we propose a pre-filter with a null-space constraint that block-diagonalizes the channel matrix, resulting in zero multi-user interference. Each terminal then only has to eliminate its own inter-stream interference, which does not require information from the other users' channel. This scheme thus breaks down the optimisation schemes in independent, smaller per-user optimisation. It lends itself to numerous designs of which joint transmit-receive MMSE is discussed. The performance of this design scheme is assessed by simulations.
Starting Page	171
Ending Page	174
File Size	359189
Page Count	4
File Format	PDF
ISBN	0780374673
ISSN	10903038
DOI	10.1109/VETECF.2002.1040325
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-09-24
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Constraint optimization MIMO Multiaccess communication Base stations Interference constraints Modulation coding Fading Interference elimination Wireless communication Radio link
Content Type	Text
Resource Type	Article

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