本文研究的是在同时使用最少频率的约束下,根据雷达回波对飞机目标进行识别分类时最佳特征量的选择问题。结果表明,仅用两种频率就可得到相当高的分类可靠性。如果同时使用两个正交极化的幅度和相位信息,那么即使采用单一频率也可得到95％以上的分类可靠性。仿真试验数据包含八架尺寸变化范围超过三倍的军用飞机。 In this paper, we study the selection of the best feature when recognizing and classifying aircraft targets based on radar echoes while using the least frequency constraint. The results show that a very high classification reliability can be obtained with only two frequencies. If you use both orthogonally polarized amplitude and phase information, you get more than 95% of classification reliability even with a single frequency. Simulation test data includes eight military aircraft with a three-fold change in size.