摘要
相对于集中式系统,多用户分布式MIMO系统的基站端天线数量显著增大,因此基站端天线选择技术成为该系统的关键技术之一,然而采用传统的天线选择算法会因复杂度过高而制约系统的可实现性.为解决上述问题,针对多用户分布式MIMO系统的上行链路,提出一种基于优化参数的低复杂度接收天线选择算法.该算法采用逐减方法,以迭代优化参数的方式代替容量计算,从而达到降低计算复杂度的目的.复杂度分析和性能仿真结果表明,在有效降低运算量的同时,该算法的容量性能仍逼近最优算法.
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 tbe 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.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2011年第1期184-188,共5页
Journal of Xidian University
基金
国家863计划重点项目高频段无线链路技术研究资助项目(2009AA011504)
