交通行业GNSS差分信息播发技术研究

Research on Broadcasting Technology of GNSS Differential Information in Transportation

GNSS差分定位技术已经广泛应用在各个领域,而实现差分定位的关键是如何将差分信息通过一定的通信手段播发给用户。本文介绍了基于现有AIS和RBN-DGPS系统的差分信息播发技术。对利用3G、FM调频副载波等常用通信方式播发差分信息进行了分析,并首次验证了FM播发差分信息的可行性。最后,在分析各种播发方式特点的基础上,结合交通行业应用,分析了适合交通行业应用的差分信息播发方式。

GNSS differential positioning technology has been widely used in various fields, and the key point of difference positioning is how to broadcast the difference informa- tion to the user by proper means of communication. This paper first introduced the differen- tial information broadcast technology based on the existing AIS and RBN--DGPS system. Secondly, common communication like 3G, FM subcarriers used to broadcast differential in- formation is analyzed, and the first time certified the feasibility of FM broadcasting the dif- ferential information. Finally based on analysis of various broadcast modes characteristics, combined with the application of transportation, this paper analyzed the suitable means for transportation industry application of differential information broadcasting mode.