基于图像合成的ISAR有源欺骗干扰方法研究

As a powerful microwave imaging recognition system in many civilian and military fields, the Inverse Synthetic Aperture Radar (ISAR), with high coherent imaging gain, is not only inhibition to the non-coherent jamming, but also can carry on the classification and recognition utilizing high resolution images, which becomes a serious threat to important target..In this research, the mechanism of synthesis of the ISAR images is exploited thoroughly, and the methods of ISAR coherent active jamming are enriched. The signal characteristic analyses and the output of ISAR imaging are concerned based on ISAR imaging theory, novel ISAR technique, novel ISAR imaging methods and space target recognition technique. The theory and methods of active deception jamming against ISAR imaging are addressed, combined with the target modeling technology and target characteristics modulation jamming technology. The jamming signal synthesis method and the improvement of false-target images are also concerned. Inspired by the radar image interpretation, image understanding and application, the evaluation criterion, index set, evaluation methods and standard evaluation process are all put into the research category. This research will give a theoretical argument and technique support for the demonstration, design and application of active deception jamming against ISAR imaging system.

ISAR作为一种重要的民用和军用微波成像识别系统，不仅具备相干成像增益，对非相干干扰有较强抑制能力，且能利用高分辨成像进行分类识别，对重要目标生存构成严峻威胁。.本项目深入探索ISAR有源图像合成机理，丰富并完善ISAR有源相干干扰样式：依托ISAR成像理论、新体制ISAR技术、ISAR成像新方法以及空间目标识别等技术，从ISAR有源图像欺骗干扰信号特性分析和成像输出响应入手，结合目标特性精确建模技术和目标特征调制干扰技术，着力突破ISAR有源图像欺骗干扰信号合成方法、虚假图像逼真度改善等关键技术，以雷达目标图像解译、图像理解和应用为评估准则，研究ISAR有源图像欺骗干扰评估指标集、评估方法和标准评估流程，开展仿真评估实验，为ISAR有源图像欺骗干扰原理样机的论证、设计及其应用提供的理论和技术支撑。

逆合成孔径雷达(ISAR)能获取非合作目标二维高分辨微波图像，在目标成像、目标识别、导弹寻的制导与摧毁等军事应用中潜力巨大，世界各国研制配备的先进体制ISAR系统对军事敏感目标(如卫星、飞机、舰船、导弹等)构成了严重威胁。针对ISAR的干扰技术研究已经成为当前雷达对抗领域中一个重要的研究课题。本项目以保护重要军事目标为需求背景，从ISAR有源转发理论与方法入手，以目标细微特征调制欺骗干扰为目的，采用理论分析和仿真实验相结合的方法，系统深入地研究了基于目标散射及微动特性调制的ISAR干扰方法。.首先，以ISAR有源转发干扰基本原理为基础，详尽分析了间歇采样、欠采样以及全脉冲采样分段等三种有源直接转发相干干扰信号及各自经ISAR二维信号处理后输出特性。其次，基于ISAR有源转发干扰信号理论与方法，借鉴目标散射波调制思想，将散射波干扰引入到ISAR二维图像欺骗干扰领域，提出了间歇/欠采样散射波ISAR图像欺骗干扰方法。将采样脉冲分段转发与目标散射波调制相结合，研究提出了采样脉冲分段转发ISAR二维图像欺骗干扰方法。最后，研究了旋转微动目标成像特性及目标微动特性调制干扰方法。以频率步进宽带雷达信号处理理论和外场测量实验数据为支撑，研究并验证了旋转微动目标回波ISAR成像特性。以旋转微动目标成像特性和欠采样转发干扰信号理论为基础，研究提出基于旋转微动特性调制的ISAR干扰调制方法和欠采样旋转微动特性调制ISAR干扰方法。