全双工干扰机的自干扰对消和目标回波削弱方法研究

doi:10.12305/j.issn.1001-506X.2024.12.01

摘要/Abstract

摘要：

全双工干扰机具备同时收、发高威胁信号的能力，在电子对抗领域具有广泛的应用前景。然而，泄露的强自干扰非线性信号的对消，成为侦收高威胁信号的难题。为了解决这一问题并提升全双工干扰机的干扰效果，提出全双工干扰机的自干扰非线性模型及其模型求解方法；为解决目标掩护能力弱的问题，提出目标削弱方法。所提全双工自干扰抑制方法旨在提高干扰机的波形捷变适应能力，目标削弱方法旨在提高对目标的掩护能力。仿真实验结果表明，所提方法可以适应雷达波形变化，与传统方法相比，归一化匹配结果实现了将目标削弱至底噪以上2 dB的水平，而传统方法无法实现目标削弱。所提方法能够迅速适应雷达信号的变化，具备更强的自干扰抑制性能，为提升全双工干扰机的目标掩护性能提供了一种技术途径。

关键词: 全双工干扰机, 自干扰对消, 自干扰非线性模型, 目标削弱方法, 雷达波形捷变, 自干扰对消性能, 目标掩护性能

Abstract:

The full-duplex jammer has the capability to simultaneously transmit and receive high-threat signals, and has broad application prospects in the field of electronic countermeasures field. However, the cancellation of leaked strong self-interference nonlinear signals has become a challenging problem for detecting and receiving high-threat signals. In order to solve this problem and enhance the interference effect of the full-duplex jammer, a self-interference nonlinear model and its model solving method for the full-duplex jammer is proposed, and a target weakening method is presented to address the weak target masking ability. The proposed full-duplex self-interference cancellation method aims to improve the waveform agility capability of the full-duplex jammer, while the proposed target attenuation method aims to enhance the masking capability for the target. Simulation experimental results demonstrate that comparing with traditional methods, the proposed methods can adapt to radar waveform variations, achieving target attenuation with a level of 2 dB above the noise floor with normalized matching results, whereas traditional methods are fail to achieve such target attenuation effect. The proposed methods can quickly adapt to changes in radar signals and has stronger self-interference cancellation performance, which provides a technical approach to enhance the target masking performance of full-duplex jammer.

Key words: full-duplex jammer, self-interference cancellation, self-interference nonlinear model, target weakening method, radar waveform agility, self-interference cancellation performance, target masking performance

中图分类号:

TN974

朱虹宇, 黄敬健, 王超, 王延祺, 袁乃昌. 全双工干扰机的自干扰对消和目标回波削弱方法研究[J]. 系统工程与电子技术, 2024, 46(12): 3939-3947.

Hongyu ZHU, Jingjian HUANG, Chao WANG, Yanqi WANG, Naichang YUAN. Research on self-interference cancellation and target echo attenuation methods in full-duplex jammer[J]. Systems Engineering and Electronics, 2024, 46(12): 3939-3947.

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参数	取值
信号类型	LFM
载频频率/GHz	10
带宽/GHz	1
无线信道长度	4
K/dB	30
主通道延迟/ns	2
IRR/dB	30
相位噪声/dB	3
带宽/Hz	50
PA平滑参数	3
回退功率/dB	0
接收机底噪/dBm	-100

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