机载双基雷达波束域杂波抑制方法

doi:10.12305/j.issn.1001-506X.2024.06.11

摘要/Abstract

摘要：

阵元域杂波补偿和抑制算法在阵元数增加时运算量急剧增大, 采用同时多波束接收的空域降维方案能够显著降低系统复杂度, 但波束域的机载双基雷达杂波非平稳性给杂波抑制带来了很大的困难, 且波束域的补偿方法目前没有相关研究。针对上述问题, 本文提出了一种适用于波束域的机载双基雷达非平稳杂波抑制方法。通过构造一个距离空变插值矩阵, 对不同距离门的回波数据做不同的插值处理, 实现了波束域距离非平稳性补偿, 针对补偿后的数据采用波束域空时自适应处理方法, 在降低复杂度的同时实现了有效的杂波抑制。仿真实验验证了该方法的有效性和可行性。

关键词: 机载双基雷达, 波束域, 杂波补偿, 杂波抑制

Abstract:

The calculation amount of clutter compensation and suppression algorithm in array element domain increases sharply when the number of array elements increases. The spatial-domain reduced-dimensional scheme of simultaneous multiple-beam reception can significantly reduce the complexity of the system, but the non-stationary property of airborne bistatic radar clutter in the beam domain brings great difficulties to clutter suppression, and there is currently no relevant research on the beam domain compensation method. To solve the above problems, this paper proposes a non-stationary clutter suppression method for airborne bistatic radar which is suitable for the beam domain. By constructing a range-dependent space-time interpolation matrix, the echo data of different range gates is interpolated differently, and the beam domain range-dependent compensation is realized. Then, the beam domain space-time adaptive processing (STAP) method is adopted for the compensated data, which achieves effective clutter suppression while reducing complexity.Simulation experiments verify the effectiveness and feasibility of this method.

Key words: airborne bistatic radar, beam domain, clutter compensation, clutter suppression

中图分类号:

TN957.51

杨艺琼, 吴建新, 梁毅. 机载双基雷达波束域杂波抑制方法[J]. 系统工程与电子技术, 2024, 46(6): 1935-1945.

Yiqiong YANG, Jianxin WU, Yi LIANG. Airborne bistatic radar beam domain clutter suppression method[J]. Systems Engineering and Electronics, 2024, 46(6): 1935-1945.

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参考文献 39

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飞行构型	速度角/(°)	主瓣杂波多普勒通道
单飞	α_t=0, α_r=0	65
同向	α_t=0, α_r=0	75
平行	α_t=90, α_r=90	105
垂直	α_t=0, α_r=90	84
交叉	α_t=40, α_r=120	90

参数	值
发射峰值功率/kW	400
占空比	0.2
脉冲重复频率/kHz	3
光速/(m·s^-1)	3e8
杂噪比(clutter-noise ratio, CNR)/dB	20
载频/GHz	1
带宽/MHz	2.5
发射、接收阵元数	24
脉冲数	128
发射机位置/km	[150, 0, 8]
接收机位置/km	[0, 0, 8]
主瓣照射坐标/km	[150, 300, 3]
发射、接收阵面角/(°)	0

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