一种雷达目标模拟器的设计

Design of a Radar Target Simulator

目标模拟器在雷达系统的研制、调试和使用维护中发挥着重要的作用,文章提出了一种数字储频式目标模拟器的设计,该模拟器采用两次变频技术;具备两个独立发射上变频通道;采用先进的数字储频技术(DRFM),复制信号具有高精度和稳定性;目标多普勒频率调制模拟采用DDS实现,频率分辨率高、相位连续、控制灵活;系统结构采用VXI总线方式。经实际验证,该目标模拟器完全满足实际使用需求,具备一定的通用性。

Target simulator plays important role in the development, commissioning, use, and maintenance. This paper proposes the design of a digital frequency target simulator. It adopts twice frequency-conversion, offers two independent transmission up conversion channels. In addition, it uses advanced digital radio frequency memory （DRFM） technique, so the duplicated signal has high accuracy and stability. The target Doppler FM simulation adopts DDS to realize, featuring high frequency resolution, continuous phase, flexible control. The system adopts VXI bus mode. Experiment verifies that the target simulation can completely meet practical application demand, having universality.