广播式自动相关监视器(ADS-B)是一种用于空中交通管制的监视设备,因为其优越的各项性能,在雷达监视领域被广泛推广。为了方便快捷地测试ADS-B 设备的准确性、可靠性和及时性等技术指标,需要使用目标模拟器来生成各种场景的ADS-B 射频测试信号,包括不同的衰减、时延、多普勒频移和交织情况等。文中给出了一种基于数字射频调制技术的目标模拟器设计与实现,阐明了其工作原理与具体实现方法。对该模拟器的测试和使用表明:该模拟器可按照设定产生多个ADS-B 目标叠加信号,操作简单且运行稳定,能够实现对ADS-B 接收系统性能和功能测试,具有很好的应用价值。

Automatic dependent surveillance broadcast (ADS-B) is a kind of surveillance device used for air traffic control. Because of its superior performance, it is widely promoted in the field of radar surveillance. In order to test the accuracy, reliabilityand timeliness of ADS-B equipment conveniently and quickly, it is necessary to use the target simulator to generate ADS-B radio frequency (RF) test signals in various scenarios, including different attenuation, delay, Doppler shift and interleaving. The design and implementation of a target simulator based on digital RF modulation technology is presented, and its working principle and specific implementation method are expounded. The test and use of the simulator show that the simulator can generate multiple ADS-B target superposition signals according to the setting, and the operation is simple and stable, which can test the performance and function of ADS-B receiving system and has good application value.

TN957