| 摘要: |
| 传统多普勒频移（DW）法对天空双基地预警雷达(Space Air Based Bistatic Radar，SABBR)非平稳杂波具有较好的抑制效果，但如果雷达几何配置关系未知，杂波方位 多普勒曲线无法得到，传统DW法无法使用。针对这一问题，提出一种基于DW法的改进算法，首先在慢时间维对杂波数据进行分块处理，减少非平稳性的影响；然后采用最小二乘估计待检测单元杂波方位 多普勒曲线，将参考单元的时域导向矢量与待检测单元对齐，估计出待检测单元的杂波协方差矩阵；最后进行STAP处理。仿真结果表明，该方法能够改善杂波抑制性能，且适用性更强。 |
| 关键词: 天空双基地预警雷达 杂波抑制 空时自适应处理 多普勒频移法 |
| DOI：DOI:10.3969/j.issn.1672-2337.2019.05.009 |
| 分类号:TN959 |
| 基金项目:学院科研创新基金重大基础研究专项课题（No.ZDJC0102） |
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| Non Stationary Clutter Suppression Method Based on Improved DW Method for Space Air Based |
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WANG Yue，YUAN Junquan，HUANG Zhongyan，WEN Jianxiong
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Air Force Early Warning Academy，Wuhan 430019，China
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| Abstract: |
| Conventional Doppler warping (DW) method has good suppression effect for space air based bistatic radar non stationary clutter. But if radar geometrical configuration relations are unknown，the clutter azimuth Doppler lines cannot be obtained，resulting in conventional DW method malfunctioning. Aiming at this problem，an improved algorithm based on DW method is proposed. First，the clutter data is segmented in the slow time dimension to reduce the impact of non stationarity. Then the clutter azimuth Doppler lines of detection cell are estimated through least square method. The time domain steering vector of reference cell and detection cell are aligned，so the clutter covariance matrix of detection cell can be estimated. Finally，STAP is performed. The simulation results show that this method can improve the performance of clutter suppression and is more applicable. |
| Key words: space air based bistatic radar clutter suppression space time adaptive processing Doppler warping method |
