针对装甲编队在复杂战场环境下的紫外光端到端通信中断问题，多采用中继辅助方式建立协作通信链路，而中继选择是关键问题之一。为了提高编队之间的通信协同能力，在解码转发协议的前提下，结合门限决策思想，提出了一种基于无线紫外光隐秘通信的装甲编队最佳中继选择算法。该算法结合紫外光非直视通信的优点，根据信噪比门限和信道特性的选择策略，对编队进行最佳中继的选择，并在高斯噪声模型下，分析了其误码率性能。仿真结果表明，在根据不同的信噪比环境和中继数来选取适当的协作门限，可获得最佳中继链路，以及在协作通信链路动态变化时，调整中继的接收和发射状态，能有效提高协作中继链路的通信质量。

In view of the end-to-end communication interruption problem of armored formations in complex battlefield environments, relay-assisted methods are often used to establish cooperative communications links, and the choice of relay is a key issue. In order to improve the communication coordination ability among formations, an optimal relay selection algorithm for armored formations based on wireless ultraviolet (UV) covert communication is proposed on the premise of decode-and-forward protocol, combined with the threshold decision idea. The algorithm combines the advantages of UV NLOS(non-line-of-sight) communication. The optimal relay selection is made for the formations according to the signal-to-noise ratio (SNR) threshold and channel characteristics selection strategy, and the bit error rate (BER) performance is analyzed under Gaussian noise model. The simulation results show that the optimal relay link can be obtained by selecting the appropriate cooperation threshold according to different SNR environments and relay number. Furthermore, adjusting the receiving and transmitting status of the relay, when the cooperative com-munications link changes dynamically, can effectively improve the communication quality of the cooperative relay link.