调频连续波（FM/CW）激光雷达是一种新体制光学非相干雷达，能成高分辨率的距离像和强度像，因此受到关注。距离像提取和噪声抑制是激光雷达的关键技术。分别对目标模型进行无噪声和含噪声激光雷达的距离像提取仿真研究，分析噪声对距离像提取结果的影响。同时，对像元数为64×64的距离像噪声分别使用均值滤波、中值滤波和顺序均值滤波等算法进行噪声抑制。仿真结果表明，顺序均值滤波对高斯和椒盐噪声的抑制都取得了较好的结果。

Frequency-modulation/continuous-wave (FWCW) ladar is a new kind optical incoherent ladar with high-resolution range image and intensity image. Therefore it attracts a lot of interest. Range image extraction and noise suppression are the key technologies. The range images of ladar with and without noise are extracted and studied respectively to analyze the influence of noise on the process of range image extraction. Meanwhile, mean filtering algorithm, median filtering algorithm and order-median filtering algorithm are used to suppress the noise of the range images. The pixel number of our range image is 64×64. The simulation results show that order-median filtering algorithm has better performance on suppressing Gaussian noise and salt-and-pepper noise.