伪卫星室内导航定位系统研究和设计

摘要

GPS (Global Position System) pseudolite is a kind of equipment generating and transmitting GPS-like signals in space . Pseudolites can be applied as the augment of the GPS constellation in case of weak GPS signal or in-comprehensive. They can also be use< to establish an independent in-door positioning system when GPS is completely ineffective. In this paper, a low-cost pseudolite design I: proposed to meet the requirements of in-door positioning) it can be captured and tracked by a spectrum analyzer and the receiver as a hard ware basis of the in-door positioning system. An algorithm named SPP was analyzed and derived as the position method, which can dea with the receiver output measurement information and obtain the results . Meantime the design of pseudolite distributing and the constitute of the in-door network is considered to improve the accuracy. Finally, in the laboratory, an experiment was conducted for static and dynam ic positioning to test the signal transmission and the ability to capture and track the pseudolite signals, also came to centimeter-level statii positioning results.%GPS (Global Position System)伪卫星是一种用来生成并发射类似GPS信号的装置,在卫星信号脆弱的情况下,伪卫星可以作为GPS辅助增强,也可以在GPS信号完全失效的情况下用来建立独立定位系统;基于伪卫星室内独立定位的需求,提出一种低成本伪卫星的设计方案,通过频谱仪和接收机能够稳定捕获和跟踪到设计的伪卫星信号,作为室内组网的硬件基础;分析和推导SPP定位算法,将接收机输出的伪距和载波相位等测量信息进行定位处理,获得定位结果;并对伪卫星室内定位进行组网布局和设计,分析实验过程中的各组网组成部分;最后,在实验室内进行静态和动态定位实验,验证能够捕获和跟踪伪卫星信号,并得出厘米级的静态定位结果.