基于微波光子时间拉伸的雷达多普勒干扰信号产生技术研究

Study on the Technology of Radar Doppler Jamming Signal Generation based on Microwave Photonics Time-Stretch

摘要:

基于传统的数字射频存储的多普勒雷达干扰信号产生技术被证实为一种有效的雷达干扰技术,该技术能够通过数字域存储雷达信号,并调制产生一定的频率偏移量,达到欺骗雷达的目的。另一方面,基于光学射频存储技术的雷达干扰信号产生技术虽然能够保留雷达信号的指纹信息,但无法产生预定的多普勒调制。本文提出一种基于微波光子时间拉伸效应的多普勒雷达干扰信号产生技术,在光学射频存储的基础上,通过微波光子时间拉伸效应,在调制到光域的雷达脉冲信号中加入一定量的多普勒频移,达到对雷达速度欺骗的效果。对该项技术开展了仿真工作,验证了该方案的可行性和实现效果。

Abstract:

Traditional radar Doppler jamming signal generation based on DRFM is proven to be an effective method to realize radar jamming,which cheats radars by the method of storing radars’ signal in digital domain, and generating Doppler frequency shift through modulating. On the other hand, radar jamming signal generation based on photonic radio frequency storage is able to reserve radar signal’s fingerprint information, but is not able to generate desired Doppler modulation. This article suggests a technology of radar Doppler jamming signal generation based on microwave photonics time-stretch effect, which takes advantage of photonic radio frequency storage, through the effect of microwave photonics time-stretch, adds a certain Doppler frequency shift to the radar signal modulated into the optical domain, in order to cheat radars in velocity. Simulation is conducted to prove this method’s feasibility and its effect.