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本文所叙述的多卜勒频率跟踪器是用于导航雷达测量地速的装置。本方案中百分之九十以上的电路由数字逻辑部件组成。实现了数字混频,数字鉴相,数字积分及数字振荡等功能。实践证明,模拟数-字式方案具有精度高,不需调整,无漂移,可靠性高等一系列优点,与计算机接口,检测也十分灵活方便。频率跟踪器将完成搜索,捕获,跟踪三个过程。四个波束的回波,由时序电路控制,每个波束占有62.5毫秒,它们周而复始轮流切换工作。
The Doppler frequency tracker described in this article is a device for navigating radar to measure ground speed. Ninety percent of the circuit in this scenario consists of digital logic components. Achieved digital mixing, digital phase identification, digital integration and digital oscillation and other functions. Practice has proved that the analog number - word program with high precision, without adjustment, no drift, high reliability and a series of advantages, and the computer interface, testing is also very flexible and convenient. Frequency tracker will complete the search, capture, track three processes. The echoes of the four beams, which are controlled by the timing circuit, occupy 62.5 milliseconds per beam, switching them around in turn.