NDLI: User Selection Methods for Multi-User Downlinks with Multiple-Antenna Terminals

Content Provider	IEEE Xplore Digital Library
Author	Lim, B.C. Krzymien, W.A. Schlegel, C.
Copyright Year	2006
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Alberta Univ., Edmonton, Alta. (Lim, B.C.; Krzymien, W.A.; Schlegel, C.)
Abstract	The need for high downlink throughput has led to the consideration of multiple-input multiple-output (MIMO) systems with multi-antenna user terminals. Spatial multiplexing via orthogonal space division multiplexing (OSDM) may be achieved using block diagonalization (BD) techniques. User subset selection is required when the potential user pool exceeds the available transmission resources. Judicious user subset selection will help ensure high system throughput. However, optimum selection requires exhaustive search. We demonstrate how existing antenna selection algorithms may be modified to operate on blocks of the overall composite channel matrix to serve as user selection algorithms for BD-OSDM. Four algorithms are derived. The approach is efficient because no BD pre-coding related computations are needed. Next, BD may employ additional user selection or receive antenna selection on the chosen user subset to help increase the sum rate or minimize the transmission power. We will show how three of the proposed algorithms lend themselves for this purpose with low additional complexity. Numerical results show good sum rate performance for the proposed algorithms especially when receive antenna selection is done on the chosen user subset
Starting Page	1
Ending Page	5
File Size	7497130
Page Count	5
File Format	PDF
ISBN	142440410X
DOI	10.1109/ICCS.2006.301442
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-30
Publisher Place	Singapore
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Downlink MIMO Throughput Array signal processing OFDM Receiving antennas Base stations Transmitting antennas Channel state information Transmitters downlink beamforming Multi-user MIMO user selection antenna selection
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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