针对一种三坐标雷达故障检测和在线模拟训练需求,文中设计一款雷达目标模拟器。该目标模拟器基于直接数字频率合成技术,采用数字信号处理器+现场可编程阵列+直接数字频率合成硬件架构,通过软件配置生成一组和、差模拟中频回波信号,可模拟特定方位、俯仰以及距离的雷达目标回波。采用该目标模拟器进行系统联试,结果表明该模拟器控制简单、运行稳定,便于扩展。

A 3-D radar target simulator is designed to provide an effective method for radar fault detection and online simulation training. This target simulator is based on DDS technology, using DSP + FPGA + DDS architecture, and a team of addition and difference simulation intermediate frequency echo signals are generated through software configuration, which can simulate radar target echo of specific azimuth, elevation and range. Using the target simulator in systematic joint test, the results show that the target simulator has the features of facile control, stable operation and flexible expansion.