【作者】 徐志鹏；

【导师】 张兴敢；

【作者基本信息】 南京大学 ， 信号与信息处理， 2012， 硕士

【摘要】 如果将弹道导弹比作长空利剑,那么导弹防御系统就是遮盖在广袤国土之上的一面无形的盾牌。研究弹道导弹防御系统对于打破国际霸权主义、维护国家安全、维护发展局面的具有重要意义。本文以弹道导弹防御系统研究为主要背景,着重讨论了目标的雷达散射截面积(RCS)、散射中心和目标高分辨率一维距离像(HRRP)这几个方面的问题,并对影响目标RCS和HRRP的主要因素做了仿真分析。首先阐述了课题研究的目的和意义,总结了国内外的研究现状。说明了研究弹道导弹防御系统的必要性和紧迫性。总结了弹道导弹的参数、飞行阶段、突防手段以及根据导弹的运动特征,守方所能提取的特征,弹道中段的识别方法。给出了RCS的定义,总结了预测和计算的方法。讨论了影响RCS的主要因素,并对雷达波频率和雷达视角对RCS的影响做了仿真。从散射中心的概念入手,以锥体目标为例,分析了几类散射中心对一维距离像的贡献。给出了多散射中心的距离像模型,并以步进频率波形为例,讨论了HRRP的距离模糊现象、平移(速度)敏感性和姿态敏感性,给出了仿真结果。更多还原

【Abstract】 If ballistic missiles is the sky sword, missile defense system is the invisible shield covered on top of vast landmass.Research on ballistic missile defense system is of great significance. It’s important to break the international hegemonism, safeguard national security, and maintain the peaceful of the situation.In this thesis, we set the ballistic missile defense system as the main background, focused on the target’s radar cross section (RCS), the scattering centers and target high-resolution range profile (HRRP), and analysis the main factors of the target RCS and HRRP. Some simulation results are given.Firstly, we describe the purpose and significance of the research, summarizes the research status at home and abroad. We illustrate the necessity and urgency of the ballistic missile defense system, summarize the parameters of the ballistic missile, flight phases, penetration means of the attacking side, and according to the motion characteristics of the missile, the characteristics of ballistic and the identification method of midcourse for the defending side.Secondly, given the definition of RCS and summarizes the forecasts and the method of calculation. We discuss the main factors to affect the RCS, and do simulation on the influencing factors of RCS derived from the radar frequency and perspective. We start from the concept of scattering centers, take cone target for example, study on types of scattering centers on the contribution of HRRP. Given the range profile model of the multi-scattering centers. To take the Step-Frequency Modulation as example, we discuss range ambiguity, speed sensitivity and the attitude sensitivity of HRRP, given the result of simulation experiment.更多还原