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提出一种采用波束调度策略的MIMO与智能天线融合设计方案,用以解决MIMO传输中空域相关性问题。融合方案在天线结构上以智能天线单元组建MIMO阵列,智能天线单元之间协同工作。分析了采用波束调度时的MIMO矩阵构成及其合并接收方式,给出一种波束间空域相关性的计算方法。仿真结果表明,在小角度扩展条件下,同指向的波束相关性与全向阵元相关性相似,而波束调度策略具有良好的去相关性,能有效提高MIMO信道容量。
A scheme of MIMO and smart antenna fusion based on beam scheduling is proposed to solve the problem of spatial correlation in MIMO transmission. The fusion scheme uses a smart antenna unit to form a MIMO array on the antenna structure, and the smart antenna units work together. The composition of the MIMO matrix when using beam scheduling and its combined reception mode are analyzed, and a method for calculating the spatial correlation between beams is given. The simulation results show that the beam correlation with the same direction is similar to that of the omnidirectional array under the condition of small-angle extension, and the beam scheduling strategy has good decorrelation and can effectively improve the MIMO channel capacity.