GPS中频接收机同步的实现

Simulation of an IF GPS Receiver Synchronization

介绍了一种GPS接收机的同步实现仿真过程,由于捕获部分采用FFT变换方法,大大缩短了捕获时间,码跟踪采用数字延迟锁相环(DPLL),载波跟踪采用数字锁相环(DPLL),位同步采用了一种计算所有可能比特跳变位能量的最大似然位同步算法,可以在极低的信号与噪声功率谱密度之比的条件下,检测到比特位边界。

This paper describes the synchronization of the GPS receiver. The use of FFT in the acquisition greatly shortens the acquisition time and the use of DPLL in code tracking and carrier tracking enables bit boundary to be detected in a very low signal to noise ratio.