基于DUC的ISAR图像欺骗干扰技术

Image deception jamming technology based on DUC

摘要:

针对宽带线性调频体制雷达，介绍了一种图像欺骗干扰信号的实现方法。通过分析雷达回波去斜率解调原理，得到图像欺骗干扰信号的特征表达式。然后采用正交数字上变频(DUC)技术进行基带信号数字域调制和频率变换。经过高性能频谱仪和成像软件分析，证明了该干扰算法能产生具有欺骗效果的图像(400点×400点)。

Abstract:

Aimed at wide-band linear frequency modulation(LFM) radar，a method of image deception signal generation was put forward. Via the analysis of the demodulation of radar echo, the expression of the image deception signal was obtained. Then, a solution based on Digital Up Converter(DUC) was proposed, which implemented the conversion of a complex digital baseband signal to a real passband signal. Through the analysis by using high performance spectrum analyzer and image software, the validity of this method to generate jamming picture(400×400 pixel) was proved.