随着旺盛的卫星应用社会需求及航天新技术的迅猛发展，天基无线电系统相互交叉融合已成趋势。北斗系统从两颗卫星起步，以快速定位报告（RDSS）与短报文通信（MSS）业务为特色建成中国第一代卫星导航定位系统。随后，用8年时间构建了RNSS连续导航与RDSS定位报告相结合的北斗技术体制，完成了亚太地区覆盖。通过有效的卫星无线电频率兼容设计与国际协调，北斗系统是世界上第一个被国际电信联盟（ITU）规则认可的RNSS、RDSS、MSS三大业务相结合的卫星无线电系统。本文阐述了北斗系统在创新超越理念下的三大业务、四大功能的发展历程、技术体制、主要特点及前景预测。
Due to the strong demand for satellite applications and rapid development of new space technology,the cross-integration of space-based radio systems has become a trend.BeiDou system started from two satellites to build China's first generation satellite navigation and positioning system with the features of fast location reporting(RDSS)and short message communication(MSS)service.Then BeiDou technology frame combined with RNSS continuous navigation and RDSS location report,was constructed in eight years,and the coverage in Asia-Pacific was completed.Through effective satellite radio frequency compatible design and international coordination,BeiDou system is the first radio satellite system which includes RNSS,RDSS,MSS three major services,approved by International Telecommunication Union(ITU)in the world.This paper expounds the development process,technical frame,main features and prospect of BeiDou system with three major services and four key functions,in the concept of innovation and transcendence.
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