自适应多门限副瓣匿影电路设计与仿真

Design and Simulation of Adaptive Multi Threshold Sidelobe Blanking Circuit

针对典型副瓣匿影电路存在的特定场景下真实目标被匿影的问题,提出了一种自适应多门限判决副瓣匿影电路设计方法。该方法一方面通过增加辅助通道检测门限判决,提高微弱小目标信号检测概率;另一方面采用匿影门限自适应计算,提高真、假目标距离上重合时,真实目标的检测概率。文章对此进行了推导分析,得到了改进后的副瓣匿影电路判断逻辑,并进行了仿真验证。结果表明:改进后的副瓣匿影电路能够提高系统在所述场景下的检测概率。

Aiming at the problem that the real target is hidden in a specific scene in a typical sidelobe blanking circuit,a de⁃sign method of adaptive multi threshold decision sidelobe blanking circuit is proposed.On the one hand,this method improves the detection probability of weak small target signal by increasing the blanking threshold decision of auxiliary channel,on the other hand,the adaptive calculation of concealment threshold is used to improve the detection probability of real targets when the distance between true and false targets coincides.This paper deduces and analyzes,obtaines the improvs judgment logic of sidelobe blanking ciucuit,and carries out simulation verification.The results show that the improved sidelobe blanking circuit can improve the detec⁃tion probabiltiy of the system in the scene.