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相对于点对点多输入多输出(MIMO)系统,分布式MIMO系统的天线数量显著增大,采用现有的性能较优的天线选择算法,复杂度的增加会大大制约系统的可实现性.为了解决这一问题,根据分布式架构特点提出一种基于端口选择的改进型逐减天线选择算法.该算法通过设定上限的动态端口选择有效缩小待选天线范围,进而采用逐减方法,以优化参数迭代更新的方式达到进一步降低复杂度的目的.理论分析和性能仿真结果表明,该算法在显著降低计算复杂度的同时,其容量性能仍可逼近穷举算法.
Compared with the MIMO system, the number of antennas in distributed MIMO system increases significantly, and the existing antenna selection algorithm with better performance is used, and the increase of complexity will greatly restrict the realization of the system.In order to solve According to the characteristics of distributed architecture, this paper proposes an improved antenna selection algorithm based on port selection, which reduces the range of antennas to be selected effectively by setting the upper limit of dynamic port selection, and then uses the subtraction method to optimize the parameters The iterative updating method achieves the goal of further reducing the complexity.The theoretical analysis and performance simulation show that the proposed algorithm can reduce the computational complexity significantly and its capacity performance can still approach the exhaustive algorithm.