A User Selection Algorithm Providing Maximum Sum-Rate for Multiuser MIMO Systems

Taeyoul OH
Seungheon HYEON
Hyunsung GO
Seungwon CHOI

IEICE TRANSACTIONS on Communications   Vol.E93-B    No.5    pp.1302-1305
Publication Date: 2010/05/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.1302
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
SDMA,  multiuser MIMO,  multiuser diversity,  user scheduling,  

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This letter presents an optimal user selection algorithm that provides a maximum sum-rate in a zero-forcing based Multiuser MIMO system for downlink. The proposed technique forms a primary group of users whose channel power exceeds a predetermined threshold. Through computer simulations, we have found that the proposed method outperforms the conventional technique yielding a sum rate that is 0.33 bps/Hz higher when the transmit SNR is 10 dB and the total number of users and transmit antennas in the cell is 100 and 4, respectively.