地面数字电视广播和导航卫星信号混合定位系统中的新型定位算法.pdfVIP

中国科技论文在线 地面数字电视广播和导航卫星信号混合定 位系统中的新型定位算法# 吴虹，陈瑶，向坤，赵迎新，章辉* 5 （南开大学信息技术科学学院，天津 300071） 摘要：针对导航卫星定位系统在室内和高楼间无法定位的难题，考虑到地面电视信号的自身 优越性，文中提出利用我国正在大力发展的地面数字多媒体电视广播来辅助卫星导航信号进 行混合定位。在城市环境中众多障碍物的遮挡会使多径影响严重，对此本文基于混合定位系 统提出一种新型非视距误差消除算法——距离动态补偿和线性位置线联合算法。仿真结果表 10 明，该联合算法优于传统的泰勒级数展开法，即使在非视距影响严重的恶劣环境中仍可实现 可靠定位。 关键词：无线定位；导航卫星；到达时间；非视距传播；多径 中图分类号：TN929.53 15 A novel location algorithm based on hybrid positioning system combining DTMB with satellite navigation signals Wu Hong, Chen Yao, Xiang Kun, Zhao Yingxin, Zhang Hui (College of Information Technical Science, Nankai University, TianJin 300071) Abstract: Given the advantages of digital television signals, the hybrid positioning system 20 combining DTMB and satellite navigation signals has been introduced, in case of failure in satellite positioning alone. In this paper we take some further study on the method of NLOS error mitigation based on this system in view of a large number of obstacles in the urban environment. This novel algorithm is referred to as Range Dynamic Compensation and Linear Line of Position Joint Algorithm. The simulation testing result indicates that this joint algorithm which is superior 25 to Taylor series algorithm can achieve reliable location even in areas with serious NLOS contamination. Keywords: wireless location; satellite navigation; Time Of Arrival; Non-Line-Of-Sight propagation; multipath 30 0 引言 随着社会经济发展和信息化进程的不断深入，人们对空间信息的获取和要求愈发迫切， 卫星导航技术日益成熟。但是由于在高楼耸立的市区所能观测到的卫星数目和卫星的几何图