摘要
提出一种雷达目标全角度高维散射中心建模新方法,实现了基于一维宽带测量数据的高维散射中心模型重构。利用散射中心一维投影位置在空间的球面分布规律,提出一维——高维散射映射图(OTSM)表现目标高维散射特性,采用Hough变换提取稳定散射中心,采用最小二乘方法估计散射系数。对空间网格的密度没有严格限制,降低了建模需要的原始数据量,建立的模型能较好地概括目标在空间网格覆盖范围内的稳定点散射结构,并可外推到光学区其他频段。实例验证了方法和模型的有效性。
A novel scheme for extracting the global scattering center model of radar targets is proposed. The 2D/3D scattering center models can be reconstructed based on the wide band measurements at different viewing angles. The sphere spreading of the 1D scattering center projections is exploited; the 1D-2D/3D Scatterer Map （OTSM） is designed to manifest the high dimensional scattering characteristic of radar targets; the Hough transform and the Least Squares method are used to extract the stable scattering centers and their scattering coefficients. This modeling method does not need a high density of the spatial grid, which greatly reduce the necessary original data. The model built in this way describes the stable point scattering mechanisms in a large spatial extent and can be extrapolated to other frequencies in the optical region. Examples verify the validity of both the model and the method.
出处
《电波科学学报》
EI
CSCD
北大核心
2007年第3期436-441,480,共7页
Chinese Journal of Radio Science
基金
"973"国家安全重大基础研究项目
关键词
雷达目标
散射中心
全角度
特征重构
radar target, scattering center, global, signature reconstruction
