基于间歇采样转发的机载干涉仪稳定虚假目标生成方法

doi:10.12305/j.issn.1001-506X.2026.02.07

Abstract

Abstract:

For the scenario of interfering with airborne interferometer direction-finding and localization, there is no method yet to form stable false target. To address this problem, an interferometer stable false target generation method is proposed, i.e., using interrupted-sampling forwarding technique to achieve coherence between the forwarding source and the radiation source signal, and making the two signals quasi-synchronously arrive at the receiving end of the interferometer through amplitude and phase modulation and delayed forwarding. Firstly, the synthetic signal mathematical model of dual-point source generating stable false target is established, and the factors that affect the interferometer angle measurement results are obtained and analyzed in simulation. Then the stable false target generation steps are proposed and analyzed for specific scenarios of single/dual-site localization. Finally, the angle measurement results with using unmodulated dual-point source signals and the proposed method are simulation compared, and the ability to generate stable false targets under single/dual-site localization is analyzed. Theoretically, it is possible to accurately control the stable false target, subject to engineering constraints, with control errors on the order of kilometers and stabilization up to 97.5%.

Key words: coherent interference, angle deception, false target

CLC Number:

TN 972+.1

Qi ZHAO, Zhonghao LU, Jiapeng YIN, Weidong HU, Shunping XIAO. A stable false target generation method for airborne interferometer based on interrupted-sample forwarding[J]. Systems Engineering and Electronics, 2026, 48(2): 447-455.

Figures/Tables 16

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References 25

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参数名称	符号	取值
转发源附加相位差/rad	Φ_J	π/6
两源幅度比	A	0.9
基波比	D/λ	1/2
辐射源角度/（°）	θ_E	20
转发源角度/（°）	θ_J	−10

参数名称	符号	取值
机载干涉仪起始位置/km	P_I0	（−10, −50）
机载干涉仪速度/（m/s）	v	110
辐射源位置/km	P_E	（−3, 8）
转发源位置/km	P_J	（5, 0）
虚假目标1位置/km	P_F1	（−1, −5）
虚假目标2位置/km	P_F2	（3, 4）
载频/MHz	f_c	200
辐射源信号脉宽/μs	pw	15
辐射源脉冲重复周期/μs	PRI	80
辐射源初相/rad	Φ₀	π/6
干涉仪基线长度	D	λ/2
转发源附加相位差/rad	Φ_J	π/3
信噪比/dB	SNR	20
转发源信号脉宽/μs	pw_J	pw/2
转发处理时间/μs	t_p	3

参数名称	符号	取值
机载干涉仪1起始位置	P_I10	（−10, −50）
机载干涉仪2起始位置	P_I20	（0, −50）
辐射源位置	P_E	（−3, 8）
转发源1位置	P_J1	（5, 0）
转发源2位置	P_J2	（−5, 3）
虚假目标位置	P_F	（0, −5）

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A stable false target generation method for airborne interferometer based on interrupted-sample forwarding

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