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针对机载雷达平台运动造成的杂波谱中心偏移和展宽,提出一种Doppler分布式杂波(DDC)模型在时域描述杂波协方差矩阵.并基于该参数化模型,研究了最大似然、加权子空间匹配等超分辨率方法在杂波Doppler参数估计中的应用,取得了明显优于传统方法的性能.理论推导和实际数据处理结果也验证了模型的正确性及参数估计方法的有效性.
A new Doppler distributed clutter (DDC) model is proposed to describe the clutter covariance matrix in the time domain according to the shift and broadening of the clutter spectrum center caused by the airborne radar platform motion. Based on this parametric model, the maximum likelihood , Weighted subspace matching and other super-resolution methods in clutter Doppler parameter estimation, and achieved significantly better than the traditional method performance. Theoretical derivation and the actual data processing results also verify the correctness of the model and parameter estimation method is valid Sex.