GPS IF信号的计算机模拟和实现
Modeling and Realization of GPS IF Signal
-
摘要: 提出了用GPS卫星星历来近似模拟计算载波多普勒频率和卫星信号延迟,进而用计算机模拟GPS接收机的中频数字信号,为软件GPS接收机的模型算法提供数据源。与实际接收的卫星中频数字信号的频谱进行比较,结果表明,用计算机模拟GPS IF信号是可行的和有效的。Abstract: A GPS IF signal computer-aided simulation method is proposed.The carrier Doppler frequency and the total propagation delay time can be modeled or calculated with the input GPS satellite ephemeris file.The simulated GPS IF signal is output to a text file for GPS software receiver post-processing and analyzing.The simulated GPS IF signal spectrum is compared with the received real one.The validity of the simulation result is verificated.
下载:
