提高GPS定位精度的数据处理技术  

Overview of GPS Data Processing to Improve Positioning Precision

作　　者：宋茂忠[1] 

机构地区：[1]南京航空航天大学信息科学与技术学院,南京210016

出　　处：《数据采集与处理》2001年第2期220-226,共7页Journal of Data Acquisition and Processing

基　　金：航空科学基金 (编号 :97E5 2 0 33)

摘　　要：尽管全球定位系统 (GPS)已经是目前精度最高的无线电导航系统 ,但仍有许多用户不满足于 GPS定位的原始精度 ,希望获得更高的性能。基于 GPS输出信息的数据处理就是一种广泛采用的技术。GPS数据基本的处理方法有两种 :基于单个 GPS接收机输出数据的滤波、平滑处理 ;基于两个或多个 GPS接收机的差分校正处理 (DGPS)。差分 GPS只能消除选择可用性和电离层时延等公共误差 ,对多径干扰仍无能为力。多径已成为近距差分的主要误差源。为了抗多径 ,本文还综述了两种先进的 GPS数据处理方法 :空间Although the global positioning system (GPS) is the most accurate radio navigation system, a lot of users are still not satisfied with the accuracy of the original positioning. To improve the accuracy, the data processing based on the information output from a GPS receiver is widely used in many application systems. Basic data processing for GPS information includes: (a) filtering and smoothing for single GPS receiver, and (b) differential correction using two or more GPS receivers (DGPS). DGPS removes only the common errors such as selective availabi lity and ionospheric delay errors. But multipath which is not common error thus remains and therefore the dominant error source in DGPS. To mitigate multipath , advanced data processing for GPS which includes: (c)space time processing to mitigate multipath,(d) data diagnosing and excluding, is reviewed.

关 键 词：无线电导航系统 GPS 定位精度 数据处理 

分 类 号：TN96[电子电信—信号与信息处理] TP274.2[电子电信—信息与通信工程]