基于通用仪器的DRFM雷达目标模拟器实现

Realization of DRFM Radar Target Simulator Based on General Instruments

在雷达测试系统中,需要模拟目标回波;同时,为了测试雷达的抗干扰特性,还需要产生欺骗干扰的信号。数字射频存储(Digital Radio Frequency Memory,DRFM)由于可以高保真地存储和复制采样信号,测试系统不仅能产生多个假目标,还能产生距离拖引干扰和速度拖引干扰,是现代雷达目标测试的首选方式。文中基于通用的矢量信号源SMW200 A和实时频谱仪FSW构建的DRFM雷达目标模拟器,实现了雷达多目标实时模拟和干扰模拟,模拟器工作频率覆盖10 k Hz^40 GHz,能够实现雷达多辐射源的信号产生、多目标回波特性、欺骗干扰、噪声干扰、多种环境杂波、合成孔径雷达面目标模拟等。基于通用仪器构建的DRFM模拟器实现了雷达目标模拟器的通用化和标准化,适合各种雷达系统的测试需求。

The target echo should be simulated in the radar testing system. Meanwhile, the deception jamming signals should be generated to test the anti-jamming characteristic of radar. As the digital radio frequency memory （ DRFM } can store and duplicate sampling signals with high fidelity, the testing system is a preferred method to test the modern radar targets which can not only gen- erate multiple false targets, but also generate the range-gate pull-off jamming and velocity-gate pull-off jamming. The DRFM radar target simulator constructed based on the universal vector signal generator SMW200 A and real-time spectrum analyzer FSW realizes the real-time simulation of multiple radar targets and jamming simulation with an operating frequency ranging from 10 kHz to 40 GHz. It can also realize generation of signals from multiple radar emitters, multi-target echo characteristic, deception jamming, noise jamming, multiple environment clutters and synthetic aperture radar area target simulation. The DRFM simulator constructed based on the general instruments realizes the universality and standardization of radar target simulator, and it can meet the require- ments for testing various radar systems.