导弹起飞零时测量方法的仿真研究

Correlation detection of the zero time of missile launching

摘要: 在采用激光测量导弹起飞零时刻的系统中,关键的问题是要解决抗强背景光干扰和寻求适应背景不断变化的探测技术.为此提出了一种基于激光脉冲编码、相关检测的自适应门限控制方法,并给出了最佳判决门限、信噪比和相关峰动态范围之间的解析表达式.研究了最小探测光功率一定时,信号、噪声的相关峰动态范围K和信噪比对探测概率、虚警概率的影响.仿真实验表明,当相关峰的信噪比为5.803dB,>1.4时,虚警为10-6,检测概率为0.988.

Abstract: A modulated laser detection system is designed to measure the zero time of launching.The best way is to adopt the correlation detection to enhance the signal-noise ratio(SNR) and the adaptive threshold,which can detect laser echo in the worst environment.The relationship among the optimal threshold level,SNR and the dynamic separation K is deduced.At SNR is 5.803dB,>1.4,the detection probability and the false alarm probability are 0.988,10-6respectively.