机动平台大斜视SAR散射波干扰方法研究

Scattering Wave Jamming Method for Maneuvering Platform High Squint SAR

机动平台大斜视SAR系统的运动参数难以实时侦察和精准预测,极大地增加了对其实施高逼真度欺骗干扰的难度。本文基于散射波干扰无需侦察平台运动参数的特点,研究了散射波干扰应用于机动平台大斜视SAR的干扰机理、干扰效果及有效干扰区域,提出了基于乘积调制频控阵的机动平台大斜视SAR散射波干扰方法,该方法利用频控阵的多载波特性和乘积调制的方位扩展特性,形成高逼真度的阵列假目标。理论分析和仿真结果表明,所提方法无需侦察平台运动参数,能够对机动平台大斜视SAR系统形成高逼真度的多假目标欺骗干扰或欺骗压制混合干扰。

The motion parameters of maneuvering platform high squint SAR system are difficult to be detected in real time and accurately predicted,which greatly increases the difficulty of high fidelity deception jamming.Based on the characteristics of scattering wave jamming without the reconnaissance of platform motion parameters,the jamming mechanism,jamming effect and effective jamming area of scattering wave jamming applied to maneuvering platform high squint SAR are studied.A scattering wave jamming method for maneuvering platform high squint SAR based on product modulated frequency controlled array is proposed in this paper.The multi⁃carrier characteristics of frequency controlled array and the azimuth expansion characteristics of product modulation are used to form high fidelity array false targets.Theoretical analysis and simulation results show that the proposed method does not need the reconnaissance of platform motion parameters,and can form high fidelity multi⁃false target deception jamming or deception suppression hybrid jamming against maneuvering platform high squint SAR system.