低重频数据辅助的近程杂波抑制方法

发布时间：2018-02-26 02:06

  本文关键词： 机载雷达 空时自适应处理 距离非平稳杂波 自适应波束形成　出处：《电波科学学报》2014年04期 　论文类型：期刊论文

【摘要】：针对机载非正侧视雷达的距离非平稳杂波抑制问题,提出了一种低重频数据辅助的俯仰预滤波方法,用于滤除距离非平稳的近程杂波.该方法在无俯仰主瓣杂波信号的低重频数据域选取训练样本,并采用自适应俯仰空间频率补偿技术估计协方差矩阵,能够得到较理想的俯仰自适应方向图.推导了近程杂波俯仰维杂波秩的计算公式,为近程杂波抑制提供了理论支撑.在滤除距离非平稳的近程杂波后,能为方位-多普勒空时自适应处理器提供距离平稳的训练样本,使其性能明显改善.仿真实验验证了该方法的有效性.
[Abstract]:The airborne sidelooking radar distance nonstationary clutter suppression, proposed pitch pre filtering method of a low frequency data, for the non smooth short-range clutter filtering distance. This method in pitch main clutter low repetition frequency domain data signal selection of training samples, and the adaptive pitch spatial frequency compensation technique to estimate the covariance matrix, can obtain ideal pitch adaptive pattern. Derived short-range clutter elevation formula of wave clutter rank, and provides theoretical support for short-range clutter suppression. In the non-stationary process near distance filtering clutter, can provide a steady distance training sample for the range - Doppler space-time adaptive processor, its performance can be significantly improved. The simulation results verify the validity of the method.

【作者单位】： 西安电子科技大学雷达信号处理国家重点实验室;
【基金】：国家自然科学基金(No.61101241,No.61372133) 中央高校基本科研业务费专项资金(K50511020008)
【分类号】：TN959.73
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本文编号：1536062