【作者】 陆新颖； 郑正奇；

【Author】 Xinying Lu 1,Zhengzheng Qi 2 East China Normal University

【机构】 华东师范大学；

【摘要】 全球定位系统(GPS)在广域区域依赖可跟踪卫星的数量以及几何分布情况,能够实现可靠精确的定位。但是在峡谷、室内和地下等封闭场合就无法获得GPS卫星信号,从而限制了定位甚至无法实现定位。本文利用伪卫星技术作为GPS的增补系统,将定位从室外无障碍的过渡到室内。通过从GPS接收机中获取基准时钟信号,重点考虑四个基站之间的时钟同步方案,以及同一基站内,伪随机序列初始状态的上升沿如何与时钟脉冲上升沿同步的问题,以提高室内定位的精度。本文提出了一个基于伪卫星技术的无缝定位发射系统的方案,可应用于火灾救援、地下室、大型会展等特殊场合。更多还原

【Abstract】 Global positioning system (GPS) achieving reliable and accurate positioning depends on tracking satellite numbers and geometric distribution in the wide area.But in enclosed places such as canyon、indoor place and underground,GPS signals cannot be captured so that positioning is limited.In this paper,pseudo satellite technology is used to be a supplement for GPS which implements the indoor position.By gaining a reference clock signal from a GPS receiver,the synchronization of rising edge between the initial state of pseudo random sequence and the clock pulse in one pseudo satellite will be focused on as well as the clocks synchronization among 4 satellites in order to improve the accuracy of indoor positioning.This paper designs a seamless positioning transmission system based on pseudo satellite which can be used for fire rescue,the basement,large-scale exhibition and other special occasion.更多还原