飞机尾流目标的最优搜索参数设计与雷达检测技术

项目名称： 飞机尾流目标的最优搜索参数设计与雷达检测技术

项目编号： No.61302193

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 刘俊凯

作者单位： 中国人民解放军空军预警学院

项目金额： 24万元

中文摘要： 飞机尾流是飞机飞行时所产生的固有的流体力学现象，与周围大气相比散射较强。尾流探测是航空安全、反隐身等领域的前沿研究课题。从雷达探测的角度看，飞机尾流属于微弱扩展介质目标，具有空间尺度大、驻留时间长的特点。现役雷达将目标视为快速点目标，未能充分利用回波特性，难以满足大空域内尾流实时监测，以及隐身飞机尾流探测的需求。面向尾流探测雷达的设计，着力研究回波建模、最优搜索参数设计以及微弱扩展目标检测技术等问题，尝试通过对尾流时、空、频域的积累提高检测性能。最优搜索参数设计利用相控阵雷达波束扫描的灵活性和资源调度的高效性来搜索尾流目标，是一种雷达体制上的创新性应用。信息几何在信号处理中的应用是一个正在引起关注的新兴学科方向，初步研究显示其具有较强的微弱扩展目标检测能力。研究成果将为尾流探测雷达设计和应用提供理论基础，将应用于飞行安全、军用飞机快速出动、隐身目标探测等方面。

中文关键词： 雷达目标检测；飞机尾流；微弱扩展目标；搜索参数设计；信息几何

英文摘要： Aircraft wake vortex is a fluid dynamical phenomenon that generated by a flying aircraft. In comparison with the ambient air, the wake vortex has stronger scattering. The detection of wake vortices has been an important problem in the fields of aviation safety, anti-stealth and other application. In point of view of radar detection, wake vortices are weak distributed medium target,with large spacial scale and long dwell time. Because of the assumption of fast point targets, the radars in commission did not fully utilize the echo characteristics, and are difficult to fulfill the requirements of the real-time surveillance of wake vortices in the larger controlled airspace, and the requirement of detection of stealth aircraft wake vortices. Based on the background of phased-array radar design of detection of wake vortices, this project studies the radar echo modeling, design of optimal search operation parameters and detection technology of weak distributed target, in an attempt to improve the detection performance through echo accumulation in time, space, frequency domain. Design of optimal search operation parameters is a creative application research in phased-array radar system through using the agility of beam scan and high efficiency of resource scheduling. Application of information Geometry to radar signal

英文关键词： radar target detection；aircraft wake vortices；weak distributed target；search operation parameters design；information geometry