空间微动目标极化欺骗式干扰信号合成方法

基于宽带逆合成孔径雷达原理,提出一种动态产生微动目标有源欺骗式干扰信号的合成方法。在多散射中心假目标模板中引入了目标全姿态运动模型、全极化散射模型,推导了与进动参数直接相关的微多普勒及姿态角表达式,建立了目标本地极化基到任意雷达极化基下的散射矩阵变换关系,基于瞬时姿态角动态生成了虚假的微动相位和极化散射调制因子,实现了距离或速度欺骗干扰。对进动假目标合成信号的时频分析和雷达成像结果表明,该方法可有效合成具有特定的微动效应、极化散射特性和结构特征的假目标信号。

Signal synthetic method of polarized deceptive jamming for spatial micro-motion targets

Based on the wideband inverse synthetic aperture radar principle, a method of synthesizing dynamically deceptive jamming signals for micro-motion targets is proposed. The full attitude model and full polarization model are introduced into the multi-scattering center model, and formulas of micro Doppler and aspect angles directly related to precession parameters are derived. The polarization scattering matrix transformation relation between targets local polarization and arbitrary radar polarization is established. On the basis of the instantaneous attitude angle, the false micro-motion phase and polarization scattering modulation factors are generated dynamically to implement distance or velocity deceptive jamming. The results of time frequency analysis and radar imaging of synthetic false targets echo show that the proposed method can effectively synthesize specific micro-motion effect, polarization scattering characteristics and structural characteristics of false target signals.