关键词: 多用户, 分布式多输入多输出, 天线选择, 容量, 低复杂度

Abstract:

The number of antennas at the base station side in a multi-user distributed MIMO system is much larger than that of a centralized one. Accordingly, antenna selection at the base station side becomes one of the key technologies in such a system. However, traditional algorithms are too complex to be realized. A low complexity receive antenna selection algorithm based on parameter optimization is proposed to deal with the complexity problem in the uplink of multi-user distributed MIMO systems. In order to reduce the complexity, an elimination method with capacity computation replaced by iterative parameter optimization computation is introduced in the algorithm. Both complexity analysis and simulation results show that the computation complexity is largely reduced while the capacity performance is still close to that of the optimal algorithm.

Key words: multi-user, distributed MIMO, antenna selection, capacity, low complexity