| 摘要: |
| 针对雷达主瓣干扰和计算量大的问题进行深入系统的研究，给出了基于空间谱估计斜投影滤波的主瓣抗干扰方法。首先，将阵元域数据变换到波束域进行处理能够在保证感兴趣区域内性能不变的情况下大大降低计算量。其次，对波束域数据进行斜投影滤波处理，抑制主瓣干扰，具有较高的工程应用价值。最后，通过计算机仿真表明：只有保证接收数据的快拍数大于2倍阵元数目，信号与主瓣干扰方位间隔大于1/4波束宽度，并且信噪比和主瓣干噪比的差异在20dB以内时，处理后的波束域数据在信号估计时不会出现估计误差，能正确地检测出目标信号。 |
| 关键词: 主瓣干扰 斜投影滤波 波束域 检测 |
| DOI：DOI:10.3969/j.issn.1672-2337.2019.03.015 |
| 分类号:TN958 |
| 基金项目: |
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| A Mainlobe Jamming Suppression Method Based on Spatial Spectrum Estimation Oblique Projection Filtering in Beam Space |
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GUO Xiaole，LI Xiangyang，QIU Wei
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The 38th Research Institute of China Electronics Technology Group Corporation, Hefei 230088, China
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| Abstract: |
| The problem of radar mainlobe jamming and large computational cost is studied in this paper. A mainlobe jamming suppression method based on spatial spectrum estimation oblique projection filtering is proposed. The obtained beam domain data can reduce the computational cost greatly under the premise of eliminating the mainlobe jamming. Simulation results show that this method can detect the target signal correctly when the snapshot number is twice the element number, the interval of signal and mainlobe jamming is greater than 1/4 beam width, and the interval of signal-noise-ratio (SNR) and mainlobe jamming-noise-ratio (JNR) is less than 20dB. |
| Key words: mainlobe jamming oblique projection filtering beam space detection |
