中文摘要：

随着GPS现代化建设进程的不断推进，改善导航与定位精度、扩大服务覆盖面和改善服务持续性，提高系统安全性和抗干扰性、注重兼容与扩充等技术相继得到了应用与实施。为此，在分析新一代GPS卫星信号改进与变化的基础上，从包含新的信号调制体制、新的军用伪码信号及其增强型应用，考虑兼容和新需求的民用伪码及新频段增设等方面进行了较为系统的归纳与深入地研究，进一步通过仿真分析验证了新一代GPS卫星信号的先进性和拓展性，从而为发展我国天基导航系统提供依据。

英文摘要：

With the unceasing development of the GPS modernization, the key technology which was used in the improvement navigation and the position accuracy, the expanded service coverage and the service endurance, the system safety enhancement and the anti-jamming ability, the compatibly attention and expansion is implemented. Therefore, it has been concluded systematic and researched thoroughly which includes the new signal modulation system, the new military pseudo-code signal and the enhanced application, the considered compatible and new demand civil pseudo-code, the new frequency band by analyzing the new generation of GPS satellite signal improvement, and further more the new generation of GPS satellite signal advancement and expansion, based on the simulation analysis, has been validated. Accordingly it provides foundation for the development of our country.space-based guidance system.