NDLI: Multimode Transmission for Multiuser MIMO Systems With Block Diagonalization

Content Provider	IEEE Xplore Digital Library
Author	Runhua Chen Zukang Shen Andrews, J.G. Heath, R.W.
Copyright Year	1991
Abstract	A low-complexity multimode transmission technique for downlink multiuser multiple-input-multiple-output (MIMO) systems with block diagonalization (BD) is proposed. The proposed technique adaptively configures the number of data streams for each user by adjusting its number of active receive antenna and switching between single-stream beamforming and multistream spatial multiplexing, as a means to exploit the multimode switching diversity. We consider a highly loaded system where there are a large number of users, hence a subset of users need to be selected. Joint user and antenna selection has been proposed as a multiuser multimode switching technique, where the optimal subset of receive antennas and users are chosen to maximize the sum throughput. The brute-force search, however, is prohibitively complicated. In this paper, two low-complexity near-optimal user/antenna selection algorithms are developed. The first algorithm aims at maximizing a capacity lower bound, derived in terms of the sum Frobenius norm of the channel, while the second algorithm greedily maximizes the sum capacity. We analytically evaluate the complexity of the proposed algorithms and show that it is orders of magnitude lower than that of the exhaustive search. Simulation results demonstrate that the proposed algorithms achieve up to 98% of the sum throughput of the exhaustive search, for most system configurations, while the complexity is substantially reduced.
Sponsorship	IEEE Signal Processing Society
Starting Page	3294
Ending Page	3302
Page Count	9
File Size	1089644
File Format	PDF
ISSN	1053587X
Volume Number	56
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	MIMO Throughput Receiving antennas Downlink Base stations Instruments Array signal processing Algorithm design and analysis Interference Laboratories sum capacity multiple-input–multiple-output (MIMO) multiuser scheduling
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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