单比特多模态SAR干扰方法研究  

One-bit Multi-modality Jamming Method against SAR

作　　者：赵博[1] 陈基 黄磊[1] ZHAO Bo;CHEN Ji;HUANG Lei(College of Electronic and Information Engineering,Shenzhen University,Shenzhen 518060,China)

机构地区：[1]深圳大学电子与信息工程学院,深圳518060

出　　处：《雷达学报（中英文）》2022年第6期1119-1130,共12页Journal of Radars

基　　金：国家自然科学基金(62171293,U1713217,61925108);深圳大学科研启动项目(2019119)。

摘　　要：该文提出了一种针对合成孔径雷达(SAR)的单比特多模态干扰方法,干扰机在截获SAR信号后,将其与单频阈值比较后量化为单比特数据。与传统高精度采样量化生成高逼真度假目标的欺骗干扰方法相比,单比特量化仅保留了数据的符号信息,降低了采样数据的位宽,达到简化系统、提升效率、降低成本的目的。同时,基于单频阈值的单比特量化在截获SAR信号中引入了丰富的谐波分量,通过合理设计阈值的幅度、频率与相位参数,可以将单频阈值泛化为多种阈值。不同阈值可以有效利用不同特性的谐波,进而达到单目标欺骗干扰、多目标欺骗干扰、射频干扰和类噪声干扰等多种干扰模态单一对抗或协同对抗、多模态间捷变的灵巧干扰效果。通过仿真实验定量分析了不同干扰模态下的干扰性能,验证了所提方法的有效性。This paper proposes a one-bit multi-modality jamming method against Synthetic Aperture Radar(SAR).After being intercepted by the jammer,the SAR signal is quantized to one-bit sampling data through comparison with the single-frequency threshold.Compared with the conventional deceptive jamming method that uses the high-precision samples of a SAR signal to generate false targets with high fidelity,one-bit quantization only preserves the symbolic information of the signal,which reduces the data width of the sampled data and consequently simplifies the system,improves efficiency,and reduces the cost.Meanwhile,abundant harmonic components have been introduced into intercepted SAR signals by one-bit quantization based on the Single-Frequency Threshold(SFT).The SFT can be generalized to various thresholds by reasonably designing the threshold parameters,including amplitude,frequency,and phase.Harmonics with different characteristics can be effectively used by purposely designed thresholds.Then,ingenious jamming is achieved,which can manifest a single modality or combine multiple jamming modalities among single-target deceptive jamming,multi-target deceptive jamming,radio-frequency jamming,and noise-like jamming and has modality agility.The performance of the proposed method under different jamming modes is quantitatively analyzed through simulation experiments,verifying its effectiveness.

关 键 词：合成孔径雷达 多模态干扰 单比特量化 单频阈值 

分 类 号：TN974[电子电信—信号与信息处理]