激光导引头探测性能对高重复频率干扰激光器的影响

Influence of Laser-Seeker Detection Performance on High Repetition Rate Interference Laser

高重复频率干扰激光器被激光导引头精确探测是高重复频率有效干扰的必要条件,因此基于激光导引头探测性能研究高重复频率干扰激光器至关重要。采用计算分析的方法研究导引头虚警概率和探测概率,得出:当阈噪比TNR为3.5时,虚警概率Pf约为0.02%;当阈噪比TNR为3.5且被检测信号在导引头入瞳处的功率密度为导引头探测器门限值的1.9倍时,探测概率Pp约为99.92%。基于探测概率研究高重复频率干扰激光器的激光导引头探测概率Pp与高重复频率干扰激光器参数(平均功率P1、脉冲发射频率f、脉冲宽度τ)、激光导引头参数(探测器门限值Pth、阈噪比TNR)以及作用距离R之间的关系,并结合应用背景通过MATLAB软件进行仿真分析。

The effective detection of high repetition rate interference lasers depends on the accurate performance of laser seekers.Therefore,we use computational analysis to investigate the laser-seeker detection performance and false-alarm probability.By applying this method,we reach the conclusions that when the threshold-to-noise ratio TNR=3.5,the approximate false-alarm probability Pf=0.02%;when TNR=3.5 and the power density of the detected signal at the seeker entrance is 1.9 times the seeker-detector threshold,the approximate detection probability Pp=99.92%.Considering such detection probability,we study the high repetition rate interference laser to obtain the relationship among the laser-seeker detection probability Pp,parameters of the high-frequency interference laser(average power P1,pulse-transmission frequency f,and pulse widthτ),laser-seeker parameters(detector threshold Pth and threshold-to-noise ratio TNR),and action distance R.During this process,we use MATLAB for simulation analysis in combination with the application background.