基于相干极化GTD模型的散射中心提取新方法

针对高分辨极化测量雷达体制,提出了一种基于相干极化几何绕射模型(GTD)的雷达目标散射中心提取新方法。首先建立了全极化测量条件下的相干极化GTD模型,并将MUSIC算法拓展用于高分辨雷达目标的全极化散射中心提取。该方法是一种极化和超分辨联合处理方法,它实现了对不同极化通道的散射中心数目、位置、类型、强度以及归一化相干极化散射矩阵的同时估计,同时还因充分利用了全极化信息,提高了各参数估计的精度。基于仿真和实测数据的实验结果验证了该方法的有效性。

Novel method for scattering center extraction based on coherent polarization GTD model

For high-resolution polarimetric radar systems,a novel method for full-polarization scattering center extraction based on GTD model is presented.Firstly,the coherent polarization GTD signal model is established based on the full-polarization measurements.Thereby,the improved MUSIC algorithm,which can estimate the number,type,position,intensity and normalized coherent scattering matrix of scattering centers instantaneously,is proposed.The algorithm is a joint processing between polarization and super-resolution essentially.It is able to estimate the parameters of scattering centers instantaneously for each channel,and its performance is better than the one which extracts parameters from every channel separately because the full-polarization information is used.The validity is proved by the experimental results based on simulated and real data.