本文讨论的弹载脉冲多普勒雷达目标模拟器主要是在外场静态联试时为雷达提供模拟动态目标回波信号，以检查其截获跟踪性能。
The pulse Doppler radar simulator discussed is used to provide radar echo signals and checkout the performance of radar in an open condition.
为此，他们产生高频率的超声波脉冲回波是由传感器检测和评估。
For this purpose they generate a high frequency ultrasonic pulse the echo of which is detected and evaluated by the sensor.
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