中段目标高分辨距离像姿态敏感性影响度量方法

高分辨距离像（HRRP）存在散射中心模型改变、越距离单元走动、闪烁现象三个方面的姿态敏感性，同时影响距离像预处理、特征选择、模板生成等方面。为了区分不同姿态敏感性对距离像识别的影响，从而研究针对性的解决办法，首先在识别理论框架下，建立了“HRRP姿态敏感性影响水平统计模型”作为姿态敏感性对目标识别性能影响的定量分析工具。其次，针对弹道中段目标识别问题，定量分析了中段目标HRRP的姿态敏感性。暗室实测数据表明，闪烁现象与越距离单元走动对HRRP识别的影响程度相近。最后，通过比较聚类模板生成算法和邻近姿态角模板生成算法，验证了基于姿态敏感性影响水平分析方法的有效性。此分析方法对于弹道中段目标识别具有一定的参考价值。

Impaction Measurement of Target Aspect Sensitivity on HRRP BasedRATR Techniques for Ballistic Target in Midcourse

Target aspect sensitivity of high range resolution profiles (HRRP) includes three aspects: variation of scattering center model, migration through range cells (MTRC) and glint. All of them affect the recognizing process, such as data preprocessing, feature extraction, template generation and so on. To quantitatively analyze the impacts of the target aspect sensitivity and develop relevant methods, a measurement method named ’statistical model of HRRP target aspect sensitivity impacts’ based on the HRRP based recognition techniques is proposed in this paper. The proposed method is applied in analyzing the HRRP of a ballistic target in anechoic chamber. The analysis indicates that the effect of glint is close to MTRC. At last, the recognition experiment based on clustering templates and neighborhood templates is used to verify the measurement method. These research results bear certain significance for ballistic target recognition.