雷达高分辨距离像自动目标识别方法的改进
doi: 10.3724/SP.J.1146.2005.01544
Improvement on Radar Automatic Target Recognition Using HRRPs
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摘要: 在雷达自动目标识别中，广泛利用基于散射点模型的高分辨距离像(HRRP)，并取得较好的识别效果。由于散射点具有一些特点，且距离单元内的散射点的情况有时比较复杂，从而使高分辨距离像出现一些异常，导致识别发生误判。该文针对发生的问题，主要讨论了飞机类目标对偏航、俯仰、侧摆三维姿态角变化的敏感性、飞机类目标在正侧视附近的特点以及测试样本的相干峰现象，并提出了相应的改进措施。仿真数据的识别试验结果表明该文提出的改进措施可以有效地提高识别性能。Abstract: Scattering center target model is widely used to describe the target electromagnetic scattering properties in optical region.It achieves good recognition performance in High Resolution Rang Profiles (HRRPs) based Radar Automatic Target Recognition (RATR). Due to the characteristics of scattering center, sometimes HRRPs may appear abnormity, which results in error classification. In order to solve the above problems, this paper mainly discusses the sensitivities of airplane targets with the variation of course, pitch and roll angle, the property of the HRRPs near the airplane targets broadside, and coherent apex phenomena in test data. Corresponding schemes are proposed to improve the recognition performance. Experimental results based on the simulated HRRP data show the proposed schemes can improve the recognition performance effectively.
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