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

Abstract

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

CLC Number:

TN957.51

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

Figures/Tables 10

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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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Airborne bistatic radar beam domain clutter suppression method

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