激光雷达含噪距离像仿真实现与影响因素分析  

Simulation implementation and influencing factors analysis of ladar rang images with noise

作　　者：赵明波[1,2] 何峻[1] 付强[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院ATR重点实验室 [2]中国人民解放军93246部队

出　　处：《系统工程与电子技术》2011年第8期1770-1777,共8页Systems Engineering and Electronics

摘　　要：成像激光雷达的实测距离像通常受失落信息和距离反常等噪声的影响。针对实测数据获取相对困难且失落信息与距离反常噪声强弱不易控制等问题,提出了一种新的含噪距离像仿真方法。该方法根据激光雷达距离像噪声的形成机理,对成像激光雷达系统进行了仿真建模,建立起散斑、大气湍流和接收机噪声三种主要影响因素的精确模型。基于MATLAB工具软件,获取了多种场景下的成像结果。对仿真结果的分析表明:探测策略得当时,散斑效应、大气湍流和接收机噪声是造成距离像中出现失落信息和距离反常的主要因素;单纯的接收机噪声对距离反常的影响作用有限;图像的背景和目标区域内均同时存在失落信息和距离反常。A range image of imaging laser radar is usually disturbed by dropout and range anomalies.The data collection through real laser radar is time-consuming and is difficult to control the noise level.To solve these problems,a new simulation method for range images with noise is proposed.According to the noise formation,in laser radar range image,an accurate laser radar system model is constructed,which includes major affecting factors such as speckle,atmospheric turbulence and receiver noise.The range images with noise under various scenes are obtained by using MATLAB software.Simulation results reveal that speckle,atmospheric turbulence and receiver noise are major factors to cause the dropout and range anomalies when using the proper detection strategy;The receiver noise alone has a limited effect on range anomalies;The dropout and range anomalies both exist in background and target region.

关 键 词：成像激光雷达 距离像 系统仿真分析 失落信息 距离反常 

分 类 号：TN958.98[电子电信—信号与信息处理]