1． 国防科技大学 电子科学学院， 湖南 长沙 410073，zhuxiangwei@nudt.edu.cn
黄新明
1． 国防科技大学 电子科学学院， 湖南 长沙 410073
宿晨庚
2． 北京跟踪与通信技术研究所， 北京 100094
周鸿伟
2． 北京跟踪与通信技术研究所， 北京 100094
欧钢
1． 国防科技大学 电子科学学院， 湖南 长沙 410073
出于以导频通道为代表的北斗全球导航卫星系统现代化信号结构升级以及后向兼容的需求，北斗系统近几年提出了多种新型恒包络调制和复用技术，包括适用于北斗系统B1频点的正交复用二进制偏移载波（QMBOC）调制和非对称双正交相移键控（ADualQPSK）调制，适用于B2频点的时分复用AltBOC（TD-AltBOC）调制与非对称恒包络二进制偏移载波（ACE-BOC）调制，适用于B3频点的双正交相移键控（DualQPSK）调制，适用于双边带任意信号路数、任意功率配比的广义恒包络二进制偏移载波（GCE-BOC）调制。本文系统性地论述了北斗全球系统中提出的多种新型恒包络调制和复用技术，在此基础上基于GCE-BOC调制总结出了一种恒包络调制的统一解析表示形式，对全面理解北斗全球系统信号设计思路及在此基础上发展设计新型的恒包络调制和复用技术均能提供重要的借鉴。
国家自然科学基金资助项目(61403413)
1．College of Electronic Science, National University of Defense Technology, Changsha 410073, China,zhuxiangwei@nudt.edu.cn
HUANG Xinming
1．College of Electronic Science, National University of Defense Technology, Changsha 410073, China
SU Chengeng
2．Beijing Institute of Tracking and Telecommunication Technology, Beijing 100094, China
ZHOU Hongwei
2．Beijing Institute of Tracking and Telecommunication Technology, Beijing 100094, China
OU Gang
1．College of Electronic Science, National University of Defense Technology, Changsha 410073, China
For the demand of structural enhancement and backwards compatibility of modern BDS navigation signal which is represented by the pilot channel, BDS has proposed several new constant envelope modulations recently, including QMBOC and ADualQPSK modulations applied to B1 band, TD-AltBOC and ACE-BOC modulations applied to B2 band, DualQPSK modulation applied to B3 band, GCE-BOC modulation that multiplexes arbitrary signals at two different carrier frequencies. All the new modulations were systematically analyzed and a unified analytical expression of constant envelope modulation and multiplexing was summarized on the basis of the GCE-BOC modulation, which can provide an important reference for the comprehensive understanding of the signal design of the BDS global navigation satellite system and the development of new type of constant envelope modulation and multiplexing technology on this basis.