基于单脉冲三维成像的抗交叉眼干扰方法

doi:10.12305/j.issn.1001-506X.2022.04.15

摘要/Abstract

摘要：

交叉眼干扰是针对末制导雷达实施的一种有效的角度欺骗干扰, 使得导弹不能有效地跟踪并打击目标。针对这种主瓣干扰, 现有末制导雷达缺乏较为有效的对抗措施。为此, 本文提出一种基于单脉冲三维成像的抗交叉眼干扰方法。该方法首先对单脉冲雷达和、方位差、俯仰差3个通道信号在距离、多普勒两维上进行高分辨处理, 通过测量各分辨单元的方位角和俯仰角, 再结合距离信息得到目标三维像, 然后利用目标的团聚效应设定合适的阈值, 剔除由交叉眼干扰引起的目标尺寸之外的奇异点, 从而得到干扰对抗后的测角结果, 确保了导弹对目标的有效跟踪。仿真结果证明了这种抑制主瓣角度干扰措施具有一定的有效性。

关键词: 比幅单脉冲, 交叉眼干扰, 主瓣干扰抑制, 三维成像

Abstract:

Cross-eye jamming is an effective angle deception jamming against terminal guidance radar, making the missiles unable to track and strike targets effectively. For this kind of main lobe interference, the existing terminal guidance radar lacks effective countermeasures. To this end, this paper proposes an anti-cross-eye jamming method based on monopulse radar 3-D imaging. The method first performs high-resolution processing on the three-channel signals of monopulse radar in the range and Doppler dimensions. By measuring the azimuth angles and pitch angles of each resolution unit, the 3-D image of the target is obtained by combining the distance information. The three-dimensional image is then used to set an appropriate threshold using the agglomeration effect of the target to eliminate the singular points outside the target size caused by cross-eye interference, so as to obtain the angle measurement result after the interference countermeasure, which ensures the effective tracking of the target by the missile. The simulation results prove the effectiveness of this method to suppress the main lobe angle interference.

Key words: amplitude-comparison monopulse, cross-eye jamming, main-lobe jamming suppression, 3-D imaging

中图分类号:

TN958

胡艳芳, 陈伯孝, 吴传章. 基于单脉冲三维成像的抗交叉眼干扰方法[J]. 系统工程与电子技术, 2022, 44(4): 1188-1194.

Yanfang HU, Baixiao CHEN, Chuanzhang WU. Anti-cross-eye jamming method based on monopulse radar 3-D imaging[J]. Systems Engineering and Electronics, 2022, 44(4): 1188-1194.

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参数	数值	参数	数值
载频f₀/GHz	35	信号时宽T/μs	25
信号带宽B/GHz	1	弹目距离R₀/km	3.2
脉压前SNR/dB	-12.8	干信比JSR/dB	35.6
散射点数目/个	275	两干扰幅度比β	0.95
脉冲重复周T_r/ms	1	干扰基线长L/m	16
干扰支路1增益G₁/dB	64	两干扰支路相位差Δ?/(°)	178
导弹发射功率P_t/W	40	雷达天线增益G/dB	46
飞机等效散射截面积σ/m²	2.5	飞机平动速度V_r/m·s^-1	31.7

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