文档介绍：激光测高仪高斯回波分解算法
第卷第期年月红外与激光工程 41 3 2012 3
Infrared and LaserE ngineerng Mar. 2012 i
激光测高仪高斯回波分解算法
赵欣,张毅,张黎明,王相京,赵平建,涂碧海
(中国科学院安徽光学精密机械研究所,安徽合肥 230031)
要 , 摘地球表面地形的复杂多样可对激光测高仪回波波形产生显著影响,造成多峰叠加形状,该波形通过经典的阈值比较或重心点等算法很难精确得到激光足印内每个反射面的海拔高度。通过高斯
分解法把测高回波波形分解成一系列连续的高斯波形,通过拟合得到每个高斯波形的宽度、中心点、幅度等基本参数来估计激光足印内起伏地形的不同反射面的海拔高度。将该算法应用于激光测高仪原理样机,并通过采集不同地形的多模回波数据对该算法进行了验证。
关键词 ,激光测高仪 , 高斯分解, 回波, 数据拟合
文献标志码 , 文章编号 , 中图分类号 , A 1007-2276(2012)03-0643-06 ,TN951
Algorithm of laser altimeter reflecting waveform based on
Gaussian decomposition
Zhao Xin, ZhangY i, ZhangL iming, Wang Xiangjing, Zhao Pingjian,Tu Bihai
(Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Science sHefei, 230031,C hina) Abstract: The rfelecting waveform will interact with complex terrain on the earth and a usec superposition peak shape. The la sscci algorithm of threshold comparison o r focus point is difficult to accurately obtain the desired frleecting surface e levation. To decompose rea turn waveform into a sreies of Gaussian components, the numobf e tr he Gaussian components and po thse itio n, half -width and amplitude of each Gaussian componewnet re obtained. From these basic parameters, topo the graphic information as the el evations and distributions, the surface slope and roughness, and alb etdohe s of distinct reflecting surfaces w ithin the laser footprint were got by fitting. At last, the Gaussan i
decomposition method by a prototype of laser altimeter which was used to collect the signal in the country was vliadated. The results show thait s tmhethod i s adapted to fit the echo s ignal of laser altimeter on different earth surface.
Key words: laser altimeter; Gaussiand ecomposition; reflecting waveform; data fitting
收稿日期 ,2011-07-28 , 修订日期 ,2011-10-01
基金项目 , 合肥物质科学研究院院长基金
作者简介 , 赵欣 (1978-) ，男，副研究员，主要从事激光测距、测高方面的研究。
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一个激光足印内最高和最低的反射表面。