基于S参数的共轭匹配MIMO系统注水容量研究

The water-pouring principle capacity of S parameter conjugate matched MIMO system

大规模MIMO系统需要在有限的空间里采用多副天线,这将不可避免的引入耦合,耦合会影响MIMO系统性能。研究基于S参数的匹配网络MIMO系统注水容量。通过S参数网络模型,在传输端功率分配上引入注水定理,推导分析不同匹配条件下的容量闭合公式,通过Matlab对不同的接收端匹配条件下的容量进行仿真,包括:无耦合、自阻抗匹配和最优匹配几种情况。结果表明引入注水定理最大化传输端功率并且在接收端最佳共轭匹配的情况下,系统性能得到很大的改善和提高。

Large-scale MIMO systems need multiple antennas in a limited space,which will inevitably introduce coupling and will affect the performance of MIMO systems.This paper studies the Water-Pouring capacity of MIMO systems based on S-parameters.Through the S-parameter network model,the Water-Pouring Principle is introduced on the power distribution of the transmission end,and the capacity closure formula under different matching conditions is derived.The capacity under different matching conditions of the receiver is simulated by Matlab,including:no coupling,self-impedance matching,optimal matching.The results show that the introduction of the Water-Pouring Principle maximizes the power of the transmission end and the system performance is greatly improved under the condition of optimal conjugate matching at the receiving end.