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J Electromagn Eng Sci > Volume 11(2); 2011 > Article
Journal of the Korean Institute of Electromagnetic and Science 2011;11(2):71-75.
DOI: https://doi.org/10.5515/JKIEES.2011.11.2.071   
Low Complexity Multiuser Scheduling in Time-Varying MIMO Broadcast Channels
Seung-Hwan Lee1, Jun-Ho Lee2
1Electronics and Telecommunications Research Institute (ETRI)
2Mobile Communication and Digital Broadcasting Engineering, University of Science and Technology (UST)
Abstract
The sum-rate maximization rule can find an optimal user set that maximizes the sum capacity in multiple input multiple output (MIMO) broadcast channels (BCs), but the search space for finding the optimal user set becomes prohibitively large as the number of users increases. The proposed algorithm selects a user set of the largest effective channel norms based on statistical channel state information (CSI) for reducing the computational complexity, and uses Tomlinson-Harashima precoding (THP) for minimizing the interference between selected users in time-varying MIMO BCs.
Key words: Multiuser Scheduling, Multiple Input Multiple Output (MIMO), Statistical Channel State Information(CSI), Scheduling Delay, Channel Norm

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