基于频域滤波的无人机载预警雷达抗主瓣无意干扰方法

doi:10.12305/j.issn.1001-506X.2026.03.10

Abstract

Abstract:

For the operating frequency bands of airborne early warning radars are continuously expanding towards lower frequency ranges, more wireless communication devices share the same frequency bands with radar systems, causing significant unintentional jamming to unmanned aerial vehicle (UAV)-borne radars during operation and severely affecting its target detection performance. To address these issues, a mainlobe unintentional jamming suppression architecture and method based on passive/active dual-mode coordination are proposed while keeping the parameters of the airborne radar system unchanged. Firstly, in passive mode, the frequency and bandwidth of each mainlobe jamming signal are estimated using adaptive beamforming techniques and constant false alarm rate detection criteria. Then, in active mode, the suppression of mainlobe unintentional jamming is achieved through frequency domain filtering. At the same time, the filtered color noise is whitened to white noise through noise compensation, which further improves the target detection performance while achieving jamming suppression. Finally, the effectiveness of the proposed method is verified through simulation experiments.

Key words: airborne radar, mainlobe unintentional jamming, frequency spectrum estimation, frequency-domain filtering, noise compensation

CLC Number:

TN 957

Chenran GAO, Xichuan ZHANG, Yuanyi XIONG, Wei CHEN, Wenchong XIE. Anti-mainlobe unintentional jamming method for UAV-borne early warning radar based on frequency-domain filtering[J]. Systems Engineering and Electronics, 2026, 48(3): 826-834.

Figures/Tables 10

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参数分类	名称	取值
系统参数	峰值发射功率/kW	230
	脉冲重复频率/Hz	2 000
	载频/MHz	450
天线参数	阵元方向图	余弦方向图
天线参数	阵元增益/dB	4
载机参数	高度/km	8
载机参数	速度/（m/s）	220

参数分类	名称	取值
干扰参数	调制方式	AM、OFDM、FM、PM
	干扰信号个数	4
	干扰方位角/（°）	88、89、90、91
	干扰俯视角/（°）	1、1、1、1
	载频/MHz	451.6、451.5、451.0、450.5
目标参数	目标方位角/（°）	88≤θ≤92
	目标俯视角/（°）	0≤ψ≤2
	目标个数	20

干扰信号类型	干扰信号功率/dBm	SINR改善/dB
AM	14	7.23
	20	10.96
	26	14.32
OFDM	14	7.70
	20	11.42
	26	15.13
FM	14	7.38
	20	11.28
	26	14.68
PM	14	6.72
	20	10.68
	26	14.17

序号	噪声功率谱密度估计偏差率/%	信干噪比改善/dB
1	0	11.42
2	50	11.16
3	100	10.82
4	150	10.44
5	200	10.03
6	250	9.60
7	300	9.16

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Anti-mainlobe unintentional jamming method for UAV-borne early warning radar based on frequency-domain filtering

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