上海交通大学学报（英文版） ›› 2011, Vol. 16 ›› Issue (6): 691-695.doi: 10.1007/s12204-011-1212-6
Joint User and Antenna Selection for Multiuser MIMO Downlink with Block Diagonalization
LIU Wei (刘 伟), ZOU Jun (邹 俊), LUO Han-wen (罗汉文), MA Ji-peng (马继鹏)
- (1. Department of Electronic Engineering, Shanghai
Jiaotong University, Shanghai 200240, China;
2. State Key Laboratory of Wireless Communications, China Academy of
Telecommunications Technology, Shanghai 201206, China; 3.
Leadcore Technology Co., Ltd., Shanghai 201206, China)
Joint User and Antenna Selection for Multiuser MIMO Downlink with Block Diagonalization
LIU Wei (刘 伟), ZOU Jun (邹 俊), LUO Han-wen (罗汉文), MA Ji-peng (马继鹏)
- (1. Department of Electronic Engineering, Shanghai
Jiaotong University, Shanghai 200240, China;
2. State Key Laboratory of Wireless Communications, China Academy of
Telecommunications Technology, Shanghai 201206, China; 3.
Leadcore Technology Co., Ltd., Shanghai 201206, China)
摘要： User selection is necessary for multiuser multiple-input multiple-output (MIMO) downlink systems with block diagonalization (BD) due to the limited free spatial transmit dimensions. The pure user selection algorithms can be improved by performing receive antenna selection (RAS) to increase sum rate. In this paper, a joint user and antenna selection algorithm, which performs user selection for sum rate maximization in the first stage and then performs antenna selection in the second stage, is proposed. The antenna selection process alternately drops one antenna with the poorest channel quality based on maximum determinant ranking (MDR) from the users selected during the first stage and activates one antenna with the maximum norm of projected channel from the remaining users. Simulation results show that the proposed algorithm significantly outperforms the algorithm only performing user selection as well as the algorithm combining user selection with MDR receive antenna selection in terms of sum rate.
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