Performance Analysis of the Extended Low Complexity User Scheduling Algorithm over Up-Link Multi-User MIMO OFDMA Systems

Junyi WANG  Yuyuan CHANG  Chuyu ZHENG  Kiyomichi ARAKI  ZhongZhao ZHANG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E91-B   No.1   pp.327-329
Publication Date: 2008/01/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.1.327
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
multi-user MIMO,  OFDMA,  tree-structure,  user scheduling,  sum-rate capacity,  

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Summary: 
The low complexity tree-structure based user scheduling algorithm is extended into up-link MLD-based multi-user multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing access (OFDMA) wireless systems. The system sum capacity is maximized by careful user selection on a defined tree structure. The calculation load is reduced by selecting the M most possible best branches and sampling in frequency dimension. The performances of the proposed scheduling algorithm are analyzed within three kinds of OFDMA systems and compared with conventional throughput-based algorithm. Both the theoretical analysis and simulation results show that the proposed algorithm obtains better performance with much low complexity.