Coherent Doppler lidar signal processing based on maximum likelihood estimation

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Coherent Doppler lidar signal processing based on maximum likelihood estimation

XING Xiaoqing¹, LU Wei², ZHUANG Zibo³

（1. Aviation Engineering Institute, Civil Aviation Flight University of China, Guanghan 618307, Sichuan, China;2. National Key Laboratory of Science Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China;3. College of Flight Technology, CAUC, Tianjin 300300, China）

Received:2017-10-13 Revised:2017-11-23 Online:2018-04-25 Published:2018-05-02
Supported by:
邢晓晴（1991—），女，辽宁新民人，助教，硕士，研究方向为激光雷达系统设计与信号处理.

Abstract

Abstract: The accuracy of speed measurement is an important parameter of coherent Doppler lidar. Echo signal processing method is the focus of the current research. A series of velocity measurement experiments are carried out.Maximum likelihood discretization estimation is used to estimate the spectrum frequency, which is then realized by Matlab and simulation toolbox. Analysis of velocity measurement error combined with relevant parameters found that when correlation coefficient is higher, the velocity measurement error generally becomes smaller. The biggest velocity measurement error will be smaller than 0.5 m/s and the average error will be less than 0.3m/s using maximum likelihood estimation.

Key words: maximum likelihood discretization estimation, coherent Doppler lidar, digital signal processing, error analysis

CLC Number:

V243.2
TN249

XING Xiaoqing, LU Wei, ZHUANG Zibo. Coherent Doppler lidar signal processing based on maximum likelihood estimation[J]. .

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