多入多出中继系统的一种贪心天线选择算法

Greedy Antenna Selection Algorithm for MIMO Relay System

针对多输入多输出(MIMO)中继系统天线选择算法容量不高的问题,提出了一种基于容量最大化的贪心天线选择算法.该算法在考虑噪声的影响情况下,根据添加一个天线对后系统容量的闭式表达式,逐步选取使得容量最大的天线对.仿真结果表明,在不同的中继数量及功率约束条件下,该算法与已有算法相比,能够获得更高的系统容量性能.

To improve the capacity of multi-input multi-output（MIMO） relay systems with relay selection,a greedy capacity maximization antenna selection algorithm was proposed.By taking noise at relay nodes into account,the proposed algorithm selects the backward and forward sub-channel gradually according to the closed form expression of capacity when one more antenna pair is added.The simulation results show that the proposed scheme outperforms the existing selection algorithms in terms of ergodic capacity.