激光脉冲编码抗有源干扰效果研究

激光脉冲编码是激光制导武器的抗干扰措施之一。角度欺骗式干扰和高重频干扰是目前半主动激光制导武器的主要有源干扰来源。为研究不同激光脉冲编码方式对激光半主动制导武器抗这两种干扰性能的影响,本文针对敌方激光告警机的识别算法与我方导引头的解码过程,提出自相关函数与归一化互相关函数评价方法,并对目前主要编码方式进行仿真,仿真结果表明:激光脉冲编码的抗角度欺骗式干扰能力受编码序列周期性与脉冲间隔随机性的影响;抗高重频激光干扰能力受编码序列脉冲间隔随机性的影响; LFSR状态码的抗角度欺骗式干扰与抗高重频干扰效果均优于其他编码方式。

Research on anti-active-jamming effect of laser pulse coding

Laser pulse coding is one of the anti-jamming measures for laser-guided weapons.The laser-angle cheating jamming and the high-repetition-frequency laser jamming are the main sources of jamming for semi-active laser-guided weapons.To study the effect of different encoding methods on the anti-angle-cheating jamming performance and the anti-high-frequency laser jamming performance of semi-active laser terminal guidance weapons,the auto-correlation function and normalized cross-correlation function quantized methods were presented,which were concerning to the decoding algorithm of the enemy laser warning equipment and the decoding process of our seeker.In this paper,during the simulation on the main coding methods,the results show that the ability of anti-angle-cheating jamming of laser pulse coding is affected by the periodicity of coding sequences and the randomness of pulse interval;and the ability of anti-high frequency jamming of laser pulse coding is affected by the randomness of pulse interval;and the anti-angle-cheating jamming and anti-high frequency jamming effects on LFSR status coding are better than other coding methods.