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中文摘要：
目前，极化特征在弹道目标识别中已呈现出极大的应用潜力。研究了弹道目标极化特征的可分性和优选问题，首先定义了物理意义明晰的特征可分性准则，并根据典型战情下弹道目标的全极化宽窄带雷达回波，分别对其窄带极化特征和宽带极化特征的可分性进行了分析；在此基础上，优选了一组可分性高、性能稳健的极化特征量。仿真结果表明：宽带极化特征的可分性优于窄带极化特征；目标进动角越大、进动周期越短，极化特征的可分性越差。这些结论为导弹攻防对抗条件下，弹头目标极化特征的利用提供了有价值的参考。
英文摘要：
Presently polarimetry characteristics show great potential in the recognition of ballistic targets. The separability and optimization of ballistic targets＇ polarimetry characteristics have been researched in this paper. Firstly we define the separability criterion of polarimetry characteristics, which has distinct physical meaning. Based on full-polarization radar echoes of ballistic targets under typal battle situation, the separability of narrow-band and wide-band polarimetry characteristics is analysed. With these understandings, a set of polarimetry characteristics with high separability and robust performance are optimally selected. The simulation results suggest two conclusions. First, the separability of wide-band polarimetry characteristics is much better than narrow-band. Second, for greater angle of precession and shorter period of precession, the separability of polarimetry characteristics is worse. These conclusions are useful in measuring targets with polarimetry on the missile attack-defense background.
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