GNSS中频信号模拟与实现

Modeling and realization for GNSS IF signal

GNSS中频信号为系统级仿真测试提供信号源.在推导GNSS中频信号数学模型的基础上,考虑载体动态特征的自适应性,给出了模拟流程和软件实现.利用GNSS软件接收机对仿真信号进行验证,结果表明数学模型的正确性和模拟实现方法的可行性,软件扩展性强,增加相应的算法就可以模拟GALILEO、COMPASS等卫星中频信号.

GNSS IF signals provide a signal source for system simulation testing. We present a software realization and simulator structure based on the mathematical models of GNSS IF simu- lator and considering the users＇ dynatnic specifications. The GNSS receiver software is used for the test of developed simulator software. Our results show that the mathematical model is valid and the implementation method is feasibility, due to its flexible structure. GALILEO and COM- PASS signals can be easily realized by adding other algorithm.