【作者】 李海丰；

【导师】 孙付平；

【作者基本信息】 解放军信息工程大学 ， 大地测量学与测量工程， 2008， 硕士

【摘要】 随着卫星导航技术应用深度和广度的不断发展,尤其是伴随着我国导航系统的迅猛发展,用户对卫星导航用户设备的软硬件需求在日益提高,建立一套严格的测试规范来科学准确的评价接收机的工作性能具有重要意义。本文主要完成了对卫星导航基本型接收机各项性能的测试方法研究,并在此基础上,开发了一个测试场景设计软件平台,模拟产生了一系列可供卫星导航用户设备测试使用的场景模版,为进一步实现接收机的物理测试提供了较好的理论依据和数据基础。本文首先介绍了用户机测试系统的组成及工作原理,同时以基本型用户机为例,认真分析了接收机的工作原理,进而针对接收机的误码率、伪距测量精度、多通道时延一致性、首捕与重捕时间、首次定位时间、定位/测速精度、动态性能、抗干扰性等多项性能指标,研究并提出了相应的测试方法,经实际测试验证,方法具有较好的实用性和可行性。其次,基于测试系统模拟用户机真实工作环境的需要,文中对测试场景的设计进行了分析与研究,综合考虑了星座结构、用户轨迹以及各种误差因素对接收机工作性能的影响,设计了能较为科学的衡量接收机工作性能的场景模版。最后,基于所构建的数学模型,在Windows平台下,使用C#.NET开发了用户机测试场景设计软件平台。更多还原

【Abstract】 With the development of the GNSS technology, especially with the development of China CNSS, the applications are tremendously made in many fields, this leads to more and more good performances requirements both in hardware and software for navigation equipments. Thus it is of high significance to establish a stringent test standards to evaluate the performance of the receivers scientifically and accurately. This thesis presented the methods for basic receiver test, based on it, a platform for test scene designation was developed, several scene templates which can be used for user equipment test were simulated and generated. Our work provides theoretical basis and data foundations for further realization of receivers physical test.This thesis introduced the components and functional principles of the user receiver test system, as a example of basic user receiver, analyzed the principle of the receivers, then considering the receiver bit error rate, pseudo range measurement accuracy, consistency of multi-channel delay, time delay for acquisition and re-acquisition, time for first positioning, position/velocity precision, dynamical performance and anti-interference, etc. We developed test methods corresponding to these different aspects. The methods have good availability and feasibility based on real data test result. For the needs of truly working environment simulation of receivers, designation of test scene was analyzed and studied. Considering the effects of satellite constellation, user trajectory and many kinds of error source on receiver working performance, scene templates which can evaluate the receiver performance were developed. Last but not least, based on the mathematical model created in the thesis, user receiver test scene designation platform was developed with C#.NET as design language, under Windows operation system.更多还原