采用递推傅氏算法测频，动态跟踪频率变化，实时调整采样率进行定点采样；

The recursive Fourier algorithm is used in frequency measuring to dynamically track the frequency change and real-timely adjust the sampling rate for fixed sampling points.

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外场实验表明，系统工作稳定，可满足无人机跟踪监视要求，适用于地面定点或移动车载对无人机的跟踪监视。

Field experiments show that the system is reliable. It meets the requirement of tracking and monitoring of UAV and can be applied to fixed point or mobile vehicle to track and monitor UAV.

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通过对调制器不均衡的模型讨论，深刻分析了调制器不均衡对载波跟踪环路稳态锁定点和平均BEP的影响。

We begin our discussion with a description of an imbalance model, then analyse its effect on carrier tracking loop steady-state lock point and its effect on average BEP.

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