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.
LIU Wei (刘 伟), ZOU Jun (邹 俊), LUO Han-wen (罗汉文), MA Ji-peng (马继鹏)
. Joint User and Antenna Selection for Multiuser MIMO Downlink with
Block Diagonalization[J]. Journal of Shanghai Jiaotong University(Science), 2011
, 16(6)
: 691
-695
.
DOI: 10.1007/s12204-011-1212-6
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