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| A Suboptimal User Selection Algorithm Based on Block Diagonalization and Fairness |
| Chen Xiao-han①②; Liu Ju①; Zheng Li-na①; Xu Hong-ji① |
| ①School of Information Science and Engineering, Shandong University, Jinan 250100, China; ②State Key Lab. of Mobile Communications, Southeast University, Nanjing 210096, China |
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Abstract In this paper, a suboptimal user selection method is proposed based on Block Diagonalization (BD). Firstly, an upper-bound of sum-rate capacity is deduced, and is used as the selection criterion of proposed algorithm. Secondly, the upper-bound is used as the adaptive criterion instead of capacity formula, called simplification of the proposed algorithm. Finally, considering the fairness between users, proposed algorithm is combined with Proportional Fair Scheduling (PFS) method. The simulation results show that proposed algorithm almost achieves the performance of the optimal algorithm and the proposed algorithm with PFS can obtain a tradeoff between the system sum-rate capacity gain and fairness.
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Received: 23 April 2008
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2009, Vol. 31 
