宽带逆合成孔径雷达欺骗干扰技术研究

Study on deception jamming technology against wideband inverse synthetic aperture radar

根据逆合成孔径雷达(ISAR)发射信号特点,该文基于模糊函数理论研究了宽带线性调频信号模糊函数及其分辨特性。用数字方法合成雷达假目标图像,实现对ISAR的欺骗性干扰。分析了数字图像合成器的工作原理和硬件实现,提出了调制器结构方案,该方案降低了资源消耗,提高了系统运行速度。理论分析和实例仿真表明,该方法可以逼真地产生假目标图像,达到了对逆合成孔径雷达欺骗干扰的预期效果。

According to the characteristics of inverse the synthetic aperture radar（ISAR） transmitted signal, the ambiguity function and its resolution of the wideband linear frequency modulation signal are researched based on the principle of radar ambiguity function. The false target radar image is syn- thesized in digital way to realize deception jamming against ISAR. The operating principle and hardware realization of the digital image synthesizer are analyzed. A scheme of the modulator structure is proposed to reduce the resource consumption and improve the operating speed of the system. Theoretical analysis and instance simulation show that this method can generate the false target image realistically and realize the deception jamming against ISAR.