卫星导航信号模拟器是卫星导航系统建设、信号体制设计、接收机研发与性能指标评估、导航终端批量检测不可缺少的重要测试设备，是当前卫星导航领域的热点方向之一。传统模拟器和接收机彼此独立，模拟器的自身指标往往不能评测。本项目在进行高精度卫星信号空间环境传播效应模拟、多种导航信号体制信号精确生成、中国BD/GPS/GLONASS多系统的空间和时间同步、多种星座模式的精密轨道仿真等理论与技术的研究基础上，解决亚厘米级导航信号生成技术，不仅解决高精度、多系统的卫星导航信号模拟器关键技术，并组合高性能接收机技术，使整个系统测量历元可配置，以实现信号生成信息和测量信息同步闭环比对，构建模拟器－接收机实时闭环测试系统，可以从更广泛、更微观的视角评估卫星导航中的问题。通过以上研究，研制具有国际先进水平的多系统卫星信号模拟器闭环测试设备。

Satellite navigation signal simulator is a important and indispensable test equipment for satellite navigation system, signal structure design, receiver development and performance assessment, the navigation terminal batch testing. It has a wide range of applications in various fields of military and civilian, and it have important academic value and it is a hot research point in the field of satellite navigation. Traditional simulator and receiver are independent of each other, the simulator indicators often can not evaluation, and is unconvincing. The project study the high-precision satellite signal propagation effects of space environment simulation, and technique for generation multi navigation system signals with high accuracy, BD /GPS/ GLONASS multi-system space and time synchronization, precise orbit simulation of the constellation model theory and technology. The project will solve the sub-centimeter-level navigation signal generation technology based on the study, and with combinations of high-performance receiver technology, the whole system will measure the generated signal and the measured information at the configured epoch with synchronization closed loop. The simulator - receiver real-time closed-loop test system will measure the problem from a broader, more micro perspective in the assessment of satellite navigation. Through the above research, the project will develop of multi-system satellite signal simulator with the international advanced level prototypes and the closed-loop test system