扫描型成像激光雷达仿真加速算法  

A Fast Simulation Algorithm of Scanning Laser Radar

作　　者：陈骁[1] 石志广[1] 杨卫平[1] 鲁新平[1] 

机构地区：[1]国防科技大学ATR实验室,湖南长沙410073

出　　处：《中国激光》2014年第8期275-280,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(61101185;61302145)

摘　　要：扫描型成像激光雷达的建模和仿真是激光雷达信号处理和系统设计领域的一项重要研究内容。提出了一种快速成像仿真方法,在不影响仿真精度的同时提高了仿真效率。通过推导像元运动轨迹以及模型面元在像平面上投影的运动轨迹,得到判断像元和面元相交关系的不等式,利用时间剖分和近似处理,求解出像元和面元可能的相交关系,再对可能的相交关系判断是否确实相交,达到降低求交次数的目的。基于该方法,对6种目标进行仿真,算法仿真结果与传统方法得到的结果相同,求交次数与运算时间降低至传统方法的1%。Modeling and simulation of scan-imaging laser radar is an important research content in the field of signal processing and system design of laser radar. In order to improve the simulation efficiency without affecting the accuracy of the simulation simultaneously, a novel fast simulation algorithm is proposed. An inequation that can judge the intersection relations between the pixel and bins can be obtained by deriving the projection of their trajectories on the image plane. Then utilizing the time subdivision and approximate treatments to judge the potential intersection relations of pixel and bins. Finally, the goal of reducing the number of intersection operations can be achieved by testing all the potential relations and finding which of them is real intersection. The consequence of performing the new proposed simulation algorithm and the traditional algorithm in simulating 6 targets shows that they yield the same result, whereas the number of intersection operations of former is equivalent to only 1% of the latter.

关 键 词：激光技术 激光雷达 仿真 快速算法 求交操作 

分 类 号：TN958.98[电子电信—信号与信息处理]