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从激光敌我识别原理和询问信号编码模式分析出发,研究了重频激光对PPM编码调制的激光敌我识别系统的干扰机理,得出了在一定重复频率激光干扰环境下激光敌我识别概率的数学表达式。针对干扰激光重频、询问信号编码、应答设备波门等参数对激光敌我识别概率的影响进行了仿真计算和分析,得出了不同参数设置对激光敌我识别概率的影响。仿真结果表明,对于同一种激光询问信号,正确识别概率随着干扰激光重频的升高而明显降低,可以通过缩短应答设备的波门宽度、降低询问信号基频或提高询问信号中有效脉位的占空比等方法,改变激光询问信号的参数,以降低其受非询问激光信号的干扰程度,从而提高激光敌我识别系统的抗重频激光干扰能力,对提高激光敌我识别系统的抗激光干扰能力具有一定的参考价值。
Based on the analysis of the principle of the enemy's and the enemy's recognition and the coding mode of the interrogating signal, the interference mechanism of the repetition laser to the PPM code recognition system is researched, and the mathematical expression of the recognition probability of the laser adjective and the enemy under a laser repetition frequency laser interference environment . The effects of parameters such as interfering laser repetition rate, interrogation signal coding, and response device wave gate on the recognition rate of the enemy and the enemy are simulated and analyzed. The influence of different parameters on the recognition rate of the enemy and the enemy is obtained. The simulation results show that the correct recognition probability decreases obviously with the repetition rate of the interfering laser for the same kind of laser interrogation signal, which can be achieved by shortening the gate width of the transponder, reducing the fundamental frequency of the interrogation signal or increasing the effective pulse in the interrogation signal The duty cycle and other methods to change the parameters of the laser interrogation signal to reduce its interference with the non-interrogating laser signal so as to improve the anti-repetition laser interference ability of the laser self-identification system and to improve the anti-laser interference Ability has a certain reference value.