Assignment Schemes for Transmit Antennas in MIMO Systems

Masoomeh TORABZADEH  Yusheng JI  

IEICE TRANSACTIONS on Communications   Vol.E91-B   No.5   pp.1548-1556
Publication Date: 2008/05/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.5.1548
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
antenna assignment,  scheduling,  MIMO,  downlink,  

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In multiple-input multiple-output (MIMO) cellular networks, certain schedulers have two independent phases: the first selects a group of users based on the scheduler criterion, and the second assigns the selected users to the transmit antennas by using an assignment scheme taking into consideration capacity maximization. Other schedulers directly select among the available channels between users and the base station in a centralized way. The schedulers of the first category can be implemented with lower complexity compared with the schedulers of the second category. For the first category, we propose three near-optimal assignment schemes with low complexities. We conducted a simulation in which the mobility of users was considered that demonstrated the superior performance of our assignment schemes. Furthermore, we analytically demonstrate their efficiency.