基于延迟自相关双门限的短波天线选择方法

短波固定台站配有多副发信天线，在实际应用时，一般是根据预先方案选择一副天线发射信号，没有充分利用天线的方向性，因而通信效果并不是最佳。针对这一问题，设计了一种能够在收发双方进行天线发送信号质量评估的探测机制，通过基于延迟自相关运算的双门限检测技术，在收接端判决各发信天线探测信号质量，然后根据评估分值，从短波固定台站众多的天线中自动选择通信效果最佳的发信天线发射信号，在不改变现有配置的情况下最大限度地提升通信质量。仿真结果表明，该方法可行有效，能够以较小的代价提高天线选择效率，充分利用天线的方向性，达到提升发射效率和通信效果的目的。

A selection method for HF antenna based on double threshold detection theory of delay autocorrelation

The high frequency(HF) fixed station is equipped with multiple transmitting antenna. In the actual application,a fixed antenna is generally chosen to transmit signal according to the plan,which does not make full use of antenna directivity. As a result,the communication effect is not the best. In order to solve this problem,a detection mechanism is designed to evaluate the quality of transmitting signals between transmitter and receiver. Based on double threshold detection theory of delay autocorrelation,the quality of the probing signal of each transmitting antenna is judged. Then,according to the evaluation scores,the antenna with the best communication effect is selected automatically from the transmitting antennas. Without changing the existing configuration,the proposed method can greatly improve the quality of communication. The simulation results show that the proposed method is feasible and effective. It can improve the efficiency of antenna selection and make full use of antenna directivity to achieve the purpose of improving emission efficiency and communication effect at a lower cost.