Scattering effects of cloud and fog produce the backscattering signal which results in laser fuze false alarm. The quantitative studies on the baseline distance of laser fuze effecting cloud-and-fog backscattering echo are seldom concerned. Based on the Monte-Carlo technology, the changing rules of wave shape and peak power of cloud-and-fog scattering echo varying with baseline distance were quantitatively given, Simulation results showed that the peak position delay of the scattering echo relative to the transmitting pulse increased, the strength of pulse-broadening effects went up and the peak power decreased along with the baseline distance increasing. With the baseline distance increasing, wave shape was more close to the Gaussian shape. Simulated results might provide optimized design of the detecting threshold and receiving-and-transmitting viewing field of laser fuze with reference.%云雾后向散射会产生引发激光引信虚警的回波信号,针对激光引信收发间距对激光引信云雾回波影响未见定量研究报道,基于蒙特卡罗法,对云雾散射回波特征进行了模拟仿真,并定量给出了云雾散射回波的波形、脉宽、波峰位置和峰值功率随收发间距的变化规律.仿真结果表明:当引信处于云雾中时,收发间距越大,散射回波相对于发射脉冲的波峰延时和展宽程度越大,而峰值功率越小,且盲区距离越小或云雾能见度越大,峰值功率随收发间距增大而减小的速度越小.分析表明:仿真结果符合云雾对传输光束的散射规律,可以为激光引信的目标识别以及收发视场参数的优化设计提供依据.
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