由于有锁频环的频率牵引，锁相环路滤波器可以设计得很窄，具有很好的抑噪性能，满足精确跟踪载波相位的要求。
Due to the frequency pulling of FLL, the passband of the filter in PLL can be made very narrow to suppress the noise, and the PLL can lock carrier's phase with high accuracy.
在分析伪码和载波跟踪环性能的基础上，给出了跟踪环路的最优带宽。
Based on the performance of PN code and carrier tracking loop, an optimal loop bandwidth is presented.
在跟踪方面，采用了基于卡尔曼滤波的载波跟踪环来提高跟踪环的性能。
In tracking aspect, use carrier tracking loop based on Kalman filter to improve tracking performance.
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