摘要
为了加强全球定位系统（GPS）对美军现代化战争的支撑作用、保持其在全球民用导航领域中的领先地位，美国提出了GPS现代化计划。本文总结了GPS现代化信号体制下，新增民码L2C、L5、L1C以及军码M码的特点以及新导航电文的变化。通过理论分析GPS现代化体制下系统裕量的改善状况，说明GPS现代化以后，广播新导航电文，干扰容限将提高8～9dB，系统抗干扰性能将得到较大提升，特别是应用点波束增强技术，M码信号的抗干扰性能将得到很大提升。
In order to enhance the performance of Global Position System（GPS） in modem warfare and keep to be the leader in global civil navigation, American proposed the plan of GPS modernization. This paper summarizes the character of new civil signals of L2C,LS,L1C and new military code M-code and the differences between the new and the old navigation data in the system of modernized GPS. Finally, the system margin improvement of GPS modernization with broadcasting CNAV which is analyzed, indicates that the limit of sufferance interferences will be improved 8～9dB, the antijamming ability also be improved Espedally, with the application of beam spot technique, the antijamming ability of M-code will improve even more.
出处
《全球定位系统》
2006年第6期20-24,共5页
Gnss World of China
