中文说明：gps信号的跟踪，采用锁相环实现，包括码环的跟踪和载波的跟踪环
English Description：
GPS signal tracking is realized by PLL, including code loop tracking and carrier tracking loop
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中文说明：gps信号的跟踪，采用锁相环实现，包括码环的跟踪和载波的跟踪环
English Description：
GPS signal tracking is realized by PLL, including code loop tracking and carrier tracking loop