空天双基雷达杂波建模与分析

doi:10.12305/j.issn.1001-506X.2025.06.09

Abstract

Abstract:

The air-space bistatic radar system has the characteristics of ultra long baseline distance between the transmitter and receiver platforms, large coverage scale of the transmission and reception beams, large diffe-rences in platform speed, and complex geometric structure configuration of transmitter and receiver. Due to factors such as the separation of transmitter and receiver, as well as the rotation of the Earth, the clutter spectrum of the air-space bistatic radar system has significantly expanded and the non-uniformity of spatial-temporal coupling becomes more prominent. Therefore, a spatial-temporal clutter model for air-space bistatic radar is established, which is suitable for space-based launch platforms at any orbital altitude. The main focus is analyzing the differences in beam coverage of the transmission and reception antenna pattern, deriving expressions for Doppler frequency and spatial frequency, and discussing the transmission Doppler distribution corresponding to different orbital heights of space-based platforms through simulation experiments, as well as the spatial-temporal coupling characteristics and range dependence of air-space bistatic clutter. The simulation results indicate that the proposed modeling method is applicable to the analysis of clutter characteristics with any air-space bistatic structure configuration.

Key words: air-space bistatic radar, clutter modeling, bistatic iso-range ring, transmission and reception beam coverage, spatial-temporal coupling

CLC Number:

TN959.73

Qingyun KAN, Jingwei XU, Guisheng LIAO, Weiwei WANG. Clutter modeling and analysis for air-space bistatic radar[J]. Systems Engineering and Electronics, 2025, 47(6): 1806-1815.

Figures/Tables 15

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References 30

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平台	参数	数值
平台	参数	中轨卫星	低轨卫星
发射平台	高度/km	15 500	828
	惯性速度/(km/s)	4.2	133(E), 18(N)
	经度和纬度/(°)	7.4	94(E), 45(N)
接收平台	高度/km	25
	速度/(m/s)	120
	经度和纬度/(°)	110(E), 34(N)

参数	数值
接收通道数	8
载波频率/GHz	1.0
波长/m	0.3
通道间距/m	0.15
相干处理脉冲数	32
脉冲重复频率/Hz	1 500

[1]	WANG Cheng-hao, LIAO Gui-sheng, XU Jing-wei, ZENG Cao. Modeling and characteristics analysis of space-time clutter for ultralong baseline bistatic airborne radar [J]. Systems Engineering and Electronics, 2016, 38(10): 2258-2266.
[2]	ZHANG Bai-hua, XIE Wen-chong, WANG Yong-liang, ZHANG Yong-shun. Airborne bistatic radar clutter suppression method based on maximum likelihood estimation [J]. Journal of Systems Engineering and Electronics, 2010, 32(8): 1590-1595.

Clutter modeling and analysis for air-space bistatic radar

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