多次散射激光雷达接收信号的模拟

MonteCarlo方法模拟多次散射激光雷达接收信号是一种经典方法，但这种方法的最大缺点是计算时间很长．为提高计算效率，本文在传统的半解析MonteCarlo方法的基础上，使用Henyey－Greenstein函数的修正公式来表示散射相位函数，计算出每个散射点处光子不发生进一步散射而直接到达接收机的概率．模拟结果显示，一、二、三次散射起主要作用，但随着海水衰减系数和接收机视场角的增大，高次散射对激光雷达的接收信号的作用也越来越强．

The Simulations of Multiple-scattering Lidar Received Signals

Monte Carlo method is a classical method used to simulate the mutiplescattering lidar received signals, but its main disadvantage is that calculation time can become prohibitively long. For improving calculation efficiency, based on the traditional semianalytic Monte Carlo method, the paper uses a modified HenyeyGreenstein function to represent the scattering phase function and calculates the probability of the photons direct reaching receiver at each scattering point. The simulation results show that the first, second and third scattering play the main influence and as the increasements of sea water extinction coefficient and receiver field of view, the influence of higher scattering on the lidar received signals are also strengthening.