脉冲卷积干扰技术在超宽带SAR中的应用分析

为探讨脉冲卷积干扰技术在超宽带SAR中应用的可行性,详细分析了距离像和二维像的干扰效果,发现在二维图像中,方位向的聚焦性能明显下降。通过对目标回波和干扰信号处理流程的分析,发现超宽带SAR空变特性是导致二维图像散焦的根本原因。提出对干扰信号进行相位调制,调整干扰信号的分布曲线,以降低空变特性的影响,取得了较好的干扰效果。研究表明,距离向的干扰效果与常规雷达一致,可以形成滞后的假目标欺骗干扰,改进的脉冲卷积干扰大大提高了方位向聚焦性能,用于对超宽带SAR进行假目标干扰。仿真结果验证了理论分析的正确性。

Analysis of Pulse Convolution Jamming Technique Applied to Counter UWB SAR

To study the feasibility of using pulse convolution technique in jamming the Ultra Wide Band(UWB) Synthetic Aperture Radar(SAR),the jamming effects on both range profile and two dimensional(2D) images were analyzed and simulated.It was discovered that the image of the jamming signal cannot focus completely in 2D images.The space-variant is the main reason causing the degradation of the image.Introduced here is an extension of the pulse convolution technique which modulating the phase of the jamming signal t...