A Novel User Pairing Algorithm for Uplink Virtual MIMO Systems

Wei LIU  Wu-yang JIANG  Hanwen LUO  Ming DING  

IEICE TRANSACTIONS on Communications   Vol.E95-B   No.7   pp.2485-2488
Publication Date: 2012/07/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.2485
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
virtual multiple-input multiple-output (Virtual MIMO),  user pairing,  semi-orthogonal user selection (SUS),  inverse selection,  

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The conventional semi-orthogonal user pairing algorithm in uplink virtual MIMO systems can be used to improve the total system throughput but it usually fails to maintain good throughput performance for users experiencing relatively poor channel conditions. A novel user paring algorithm is presented in this paper to solve this fairness issue. Based on our analysis of the MMSE receiver, a new criterion called “inverse selection” is proposed for use in conjunction with the semi-orthogonal user selection. Simulation results show that the proposed algorithm can significantly improve the throughput of users with poor channel condition at only a small reduction of the overall throughput.