It adopts the way of PLL (Phase Locked Loop) and FLL (frequency Locked Loop).It not only satisfies the dynamic capability and tracking precision, but also can alternate according to the environment.

• 在载波跟踪中，采用了PLL(锁相环)与FLL (锁频环) 结合的载波跟踪方案，使得跟踪环能够同时满足动态性能与跟踪精度的要求，且根据环境的变化使PLL和FLL交替工作。