The de-noising of lidar signal, especially for the range-dependent systematic noise, always affects the signal-to-noise ratio of lidar signal and the inversion accuracy of aerosol backscatter coefficient. To avoid this issue, a simple de-noising operation is implemented to increase the signal-to-noise ratio and obtain a more accurate aerosol backscatter coefficient. Theoretically, the subjectivity of the iterative number of iteration method can be avoided by the simple de-noising operation. And the feasibility of the simple de-noising operation is investigated by simulation and the routine lidar experimental data. In the near ground, the aerosol backscatter coefficient with higher accuracy of about 4-10 times could be obtained with the simple de-noising operation, compared with the traditional de-noising operation. Moreover, the long-term stability of the range-dependent systematic noise can be found by the experimental results, which avoids the frequent measurement of the systematic noise. In addition, a higher effective detection altitude is obtained with the simple de-noising operation.

激光雷达信号的去噪，特别是对于与距离有关的系统噪声，总是会影响激光雷达信号的信噪比和气溶胶反向散射系数的反演精度。为避免此问题，实施了简单的降噪操作以增加信噪比并获得更准确的气溶胶反向散射系数。从理论上讲，通过简单的去噪操作可以避免迭代次数迭代方法的主观性。并通过仿真和常规激光雷达实验数据研究了简单降噪操作的可行性。与传统的降噪操作相比，在近地面上，通过简单的降噪操作，可以获得约4至10倍的高精度气溶胶反向散射系数。此外，实验结果可以发现距离相关系统噪声的长期稳定性，避免了系统噪声的频繁测量。另外，通过简单的降噪操作可以获得更高的有效检测高度。