全波形激光雷达回波信号建模仿真与分析  

Simulation Modeling and Analysis of Full-Waveform Ladar Signatures

作　　者：赵明波[1,2] 何峻[1] 付强[1] 

机构地区：[1]国防科技大学电子科学与工程学院自动目标识别重点实验室 [2]中国人民解放军93246部队

出　　处：《光学学报》2012年第6期238-251,共14页Acta Optica Sinica

摘　　要：全波形回波信号建模仿真与分析是全波形激光雷达探测技术的一项重要研究内容。针对激光束在目标场景中投影点的获取问题,提出了一种基于激光束空间边界的光线求交快速算法,运算效率高,稳定性好。基于激光雷达信号的时空分布特性,推算出目标场景对信号的响应函数,建立二者的作用过程模型。并针对全回波检测技术中的距离选通探测模式,对目标回波信号与距离选通门限的位置关系进行了分类建模和分析。在研究以上三项关键技术的基础上,构建了全波形激光雷达回波信号仿真系统,仿真实现和分析了不同距离选通门限条件下的全波形回波信号特性,并生成了复杂场景下隐蔽目标的全波形激光雷达数据。Simulation modeling and analysis of full-waveform echo signals is an important research content of full-waveform ladar detection technology.For obtaining projection points of the laser beam in the target scene,a novel ray intersection fast algorithm based on the space boundary of the laser beam is proposed,which has high computing efficiency and robustness.Based on the spatial and temporal distribution characteristics of ladar signal,the response function of its projection points in the target scene is calculated,and the interaction between the ladar signal and target scene is also modeled.For full-waveform detection of range-gated mode,classified modeling and analysis of the positional relationship between echo signal and range-gated threshold are implemented.A full-waveform ladar echo signal simulation system is constructed on the basis of the three key technologies.Full-waveform characteristics of the echo signal under different range-gated thresholds are simulated and analyzed,and full-waveform ladar data of the hidden target in a complex scene is also produced.

关 键 词：激光技术 激光雷达 全波形 建模仿真 光线求交 距离选通 

分 类 号：TN958.98[电子电信—信号与信息处理]