关键词: 反馈时延, 信道估计误差, 多用户MIMO系统, 中断容量, 多用户分集, 误比特率

Abstract:

In this paper, the impacts of such imperfect channel state information as the feedback delay and the channel estimation error on the performance of closed-loop multiuser-MIMO system based on antenna selection are analyzed, and the analytical expressions of both the outage capacity and the bit error rate are deduced. Moreover, the effect of muhiuser diversity on the system performance is revealed. Theoretical analyses show that the system performance degrades due to the feedback delay and the estimation error. Numerical simulations indicate that the theoretical analyses are valid and reasonable.

Key words: feedback delay, channel estimation error, multiuser-MIMO system, outage capacity, muhiuser diversity, bit error rate