MIMO系统中的接收天线选择算法研究

多输入多输出(MIMO)系统能极大地提高通信系统的容量和频谱利用率,然而多个射频链路的使用增加硬件成本和信号处理负担。最优的选择算法(穷举算法)和次优算法(递增或者递减算法)均能减少系统的成本和复杂度。但在天线规模较大时,选择天线时的计算量仍较大。提出一种基于信道矩阵特征空间的范数算法,仿真表明:相对于最优算法(穷举算法)和次优算法(递增或者递减算法),该算法能在损失较少容量的同时,极大地减少系统天线选择的计算时间。

Research on Receive Antenna Selection Algorithm in MIMO

Multiple-input Multiple-output(MIMO)systems can improve the capacity and reliability.However,the multiple RF chains associated with it are costly in terms of size,power and hardware.The optimal antenna selection or the subset antenna selection is an efficient way to decrease cost and complexity.However,the computation complexity is still large in the systems with large-scale antenna array.A simple heuristic algorithm based on main eigenvectors of Channel System Information(CSI)is proposed.Simulation results demonstrate that the presented algorithm yields a negligible loss compared to the the optimal selection or the subset optimal selection technique,while the computing time is reduced.