| 高斯拟合误差对测距精度的影响 |
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| 引用本文： | 王欢,李松,周辉.高斯拟合误差对测距精度的影响[J].红外与激光工程,2006,35(3):318-321. |
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| 作者姓名： | 王欢 李松 周辉 |
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| 作者单位： | 1. 武汉大学,电子信息学院,湖北,武汉,430079
2. 武汉大学,测绘科学与技术学院,湖北,武汉,430079 |
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| 摘 要： | 给出了激光测高仪接收信号模型的建立过程,并模拟了斜坡地形下接收信号的波形图.为了判定是否可以将接收信号简化为高斯信号处理,提出了以高斯拟合误差对测距精度的影响作为判定依据.以MOLA系统为例,采用LM非线性拟合算法,得到了不同目标倾斜角及阈值情况下,最优化高斯拟合波形与实际接收信号波形的误差.详细分析了MOLA系统中拟合误差对系统测距精度的影响.结果表明,这个影响相对于系统测距误差而言,可以忽略不计.因此,将MOLA系统的接收信号简化成高斯信号处理是完全可行的.
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| 关 键 词： | 高斯函数 LM算法 拟合误差 测距精度 |
| 文章编号： | 1007-2276(2006)03-0318-04 |
| 收稿时间： | 2005-07-10 |
| 修稿时间： | 2005-08-02 |
Impaction of Gauss fitting-error on ranging precision |
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| WANG Huan,LI Song,ZHOU Hui.Impaction of Gauss fitting-error on ranging precision[J].Infrared and Laser Engineering,2006,35(3):318-321. |
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| Authors: | WANG Huan LI Song ZHOU Hui |
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| Affiliation: | 1.School of Electronic Information, Wuhan University ,Wuhan 430079, China; 2.School of Geodesy and Ge.omatics, Wuhan University, Wuhan 430079, China |
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| Abstract: | The procedure to setup a return signal model of laser altimeter was given.The waveforms of return signal from slope terrains were simulated. The impaction of Gauss fitting-error on ranging precision was used to determine whether return signal was Gaussian or not. The difference between optimum fitting-waveforms and practical waveforms of MOLA return signal, with different~ target slope angle and threshold value,were obtained by using LM nonlinear algorithm. The impaction of fitting-error on ranging precision of MOLA was analyzed.The result reveals that the impaction is too small to be considered. It means that it is feasible to regard the return signal of MOLA as Gaussian shape. |
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| Keywords: | Gaussian function LM algorithm Fitting-error Ranging precision |
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