| 摘要: |
| 天空双基地预警雷达杂波具有严重的非平稳性，同时存在距离模糊，使得杂波抑制变得困难。针对考虑距离模糊时天空双基地预警雷达杂波抑制问题，基于子孔径平滑处理和重构杂波协方差矩阵的思想，提出了一种非平稳杂波抑制方法。首先对某一距离环杂波数据进行子孔径平滑处理，估计出子孔径下的杂波协方差矩阵；然后计算该距离环功率谱并作为幅度值，重构模糊距离环的杂波数据和协方差矩阵；最后利用重构数据对距离模糊杂波进行空时自适应处理。仿真结果验证了所提方法的有效性。 |
| 关键词: 天空双基地预警雷达 距离模糊 杂波协方差矩阵 杂波抑制 空时自适应处理 |
| DOI：DOI:10.3969/j.issn.1672-2337.2019.04.006 |
| 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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| Clutter Suppression Method for Space-Air Based Bistatic Radar Under Range Ambiguity |
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WANG Yue，YUAN Junquan，HUANG Zhongyan，CHEN Alei，WEN Jianxiong
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Air Force Early Warning Academy，Wuhan 430019，China
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| Abstract: |
| The clutter of space-air based bistatic radar has serious non-stationarity and the range ambiguity exists at the same time，which makes clutter suppression difficult.Aiming at clutter suppression problem for space-air based bistatic radar in consideration of range ambiguity，a non-stationary clutter suppression method is put forward based on the ideas of subaperture smoothing and clutter covariance matrix reconstructing. Firstly，subaperture smoothing is achieved for the clutter data of one range ring，and clutter covariance matrix is estimated under subaperture. Then，the power spectrum of the range ring is calculated as the amplitude value，and the clutter data and covariance matrix of the fuzzy range ring are reconstructed. Finally，the reconstruction data is used to achieve space-time adaptive processing for the range ambiguity clutter. Simulation results demonstrate the effectiveness of the proposed method. |
| Key words: space-air based bistatic radar range ambiguity clutter covariance matrix clutter suppression space-time adaptive processing |
