DocumentCode :
2696561
Title :
Low-Complexity User and Antenna Selection for Multiuser MIMO Systems with Block Diagonalization
Author :
Runhua Chen ; Andrews, Jeffrey G. ; Heath, Robert W. ; Zukang Shen
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas Univ., Arlington, TX, USA
Volume :
3
fYear :
2007
fDate :
15-20 April 2007
Abstract :
Block diagonalization is a downlink preceding technique that pre-cancels inter-user interference in multiuser MIMO systems. When there are a large number of users, the system throughput can be significantly increased by selecting a subset of users and a subset of receive antennas for each user. The optimal user and antenna subset can be obtained by exhaustively searching over all possible user and antenna combinations to find the one with the highest sum throughput. This brute-force solution, however, is prohibitively complicated. To reduce the complexity, in this paper we propose a low-complexity suboptimal user and antenna selection algorithm. For most system configurations, we show that our proposed algorithm achieves up to 98% of the optimal sum throughput of the exhaustive search, where the complexity is orders of magnitude lower than the exhaustive search method.
Keywords :
MIMO communication; channel coding; computational complexity; interference suppression; multiuser channels; precoding; receiving antennas; antenna selection; antenna selection algorithm; block diagonalization; complexity reduction; downlink preceding technique; exhaustive search method; interuser interference cancellation; low-complexity suboptimal user; multiuser MIMO systems; receive antennas; Channel capacity; Computer networks; Downlink; Heat engines; MIMO; Receiving antennas; Resistance heating; Throughput; Transmitting antennas; Wireless communication; MIMO systems; multiuser channels; scheduling;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech and Signal Processing, 2007. ICASSP 2007. IEEE International Conference on
Conference_Location :
Honolulu, HI
ISSN :
1520-6149
Print_ISBN :
1-4244-0727-3
Type :
conf
DOI :
10.1109/ICASSP.2007.366754
Filename :
4217784
Link To Document :
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