【作者】 冯天军；

【导师】 邓新蒲；

【作者基本信息】 国防科学技术大学 ， 电子与通信工程， 2008， 硕士

【摘要】 随着电子干扰和反辐射导弹技术的不断发展,以雷达为代表的有源定位方式日益受到威胁。无源定位系统由于其隐蔽工作,不易受到电子干扰和反辐射导弹的攻击,在电子战条件下具有较强的生存能力。双机无源时差-频差组合定位精度高,定位距离远,在电子对抗条件下仍能正常工作,成为学术界与工程界的研究热点。研究双机无源时差-频差组合定位技术,对于发展我国无源定位技术,提高我军的电子战和预警探测能力具有重要的现实意义。本论文对双机时差-频差组合定位的定位方法及定位精度进行了深入研究。本论文以双载机为观测平台,围绕双机无源时差-频差组合定位技术,研究了无源定位与跟踪的若干技术问题,包括研究双机时差-频差组合定位的原理、模型、定位误差分析方法、各种参数对目标高度假设定位精度的影响、三维空间跟踪定位的滤波算法以及影响定位效果的因素。论文首先给出双机时差.频差组合定位的原理,建立三维空间的定位模型,依据模型确定定位方程,通过方程推导出定位精度理论分析的几何稀释(Geometric Dilution Of Precision)公式,得出定位精度的理论分析方法;运用数值方法计算仿真出双机时差-频差组合单次定位的GDOP分布图,通过GDOP分布图的对比,分析影响定位精度的因素;建立双机时差-频差定位的系统模型,给出状态方程和量测方程,推导相关公式,给出双机时差-频差定位的扩展卡尔曼滤波算法;仿真得出典型情况下的双机时差-频差组合定位的滤波误差,并分析影响定位效果的因素。研究工作重点围绕载机作为观测器平台进行,其方法和结论是不难推广到其它类型的双观测器运动平台时差-频差无源定位与跟踪应用中。更多还原

【Abstract】 Along with the development of ECM and ARM, the active localization mode typically in which radar works is threatened increasingly. Passive localization systems are not easy to be attacked by ECM and ARM while working silently, so they have the advantage of survival ability in the environment of modern electronic warfare. With high localization precision, large detection range, working normally in the condition of ECM, time difference of arrival and frequency difference of arrival (TDOA-FDOA) localization system has attracted great research interest by both academia and engineering. Study on passive TDOA-FDOA localization system is very important to develop the national passive detection technology and improve the military ability of EW and early warning detection. Therefore, in-depth studies are made on the two-aircraft passive TDOA-FDOA joint localization method and the precision of localization in this dissertation.In this dissertation using two-aircraft as observation platform, several technology problems of passive target localization and tracking centre to two-aircraft passive TDOA-FDOA joint localization method are dealt with, they are the theory of two-aircraft passive TDOA-FDOA joint localization, modeling, analyzing for the localization precision, the impacts of various parameters to localization precision in the circumstances of the target high assumptions, three-dimensional space tracking localization filtering-algorithm as well as the factors influencing the localization. Firstly the dissertation gives the theory of two-aircraft passive TDOA-FDOA joint localization, establishes three-dimensional space model of the localization, determines the localization equation based on the model, derives from the theoretical formulas of Geometric Dilution Of Precision(GDOP) through the localization equation and obtains a theoretical method of the localization precision; calculates and simulations the GDOP curve diagrams of the single localization using the numerical method, and analyzes the factors influencing the localization precision contrasting these diagrams; establishes the system model of two-aircraft passive TDOA-FDOA joint localization, gives the equation of state and the gauging equations, infers the correlation formulas, gives the expanded Kalman filtering algorithm of the localization; obtains the localization difference in the typical situation through the simulations, and analyzes the factors influencing the localization effect. The key of the work carries on using two-aircraft as observation platform, the method and the conclusion are not difficult to promote the application of the other type two-sight moving platform passive TDOA-FDOA joint localization and tracking.更多还原