基于最大似然估计的相干多普勒雷达信号处理

taptap下载安装安卓学报

基于最大似然估计的相干多普勒雷达信号处理

邢晓晴¹，陆威²，庄子波³#br#

（1.中国民用航空飞行学院航空工程学院，四川广汉618307；2.哈尔滨工业大学可调谐（气体）激光技术重点实验室，哈尔滨150001；3.taptap下载安装安卓飞行技术学院，天津300300）

收稿日期:2017-10-13 修回日期:2017-11-23 出版日期:2018-04-25 发布日期:2018-05-02
基金资助:
国家自然科学基金项目（U1433202）

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.

摘要/Abstract

摘要： 测速精度是相干激光雷达系统的一个重要参数，着重对雷达回波信号处理方法进行分析研究。开展了一系
列1.55 μm相干激光雷达测速实验，采用最大似然离散谱方法对信号进行频谱估计，并通过Matlab 编程与
仿真工具箱共同实现。当频谱信息与高斯曲线逼近程度较高时，系统测速精确度较高。采用最大似然离散
谱峰值估计方法进行频谱估计可保证系统最大测速误差小于0.5 m/s，平均测速误差小于0.3 m/s。

关键词: 最大似然离散谱估计, 相干激光测风雷达, 信号处理, 误差分析

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

中图分类号:

V243.2
TN249

邢晓晴，陆威，庄子波. 基于最大似然估计的相干多普勒雷达信号处理[J]. taptap下载安装安卓学报.

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

参考文献

[1] DIAO WEIFENG, ZHANG XIN, LIU JIQIAO, et al. All fiber pulsed coherent lidar development for wind profiles measurements in boundary layers[J]. Chinese Optics Letters, 2014, 12(7): 71-74.
[2] WANG HENG, ZENG HAIYING, LI MIN, et al. Maximum likelihood estimationofclockskew inwirelesssensor networkswithperiodical clock correctionunder exponential delays[J].IEEE Transactions on Signal Processing,2017, 65(10): 2714-2724.
[3] 靳笑晗, 汪岳峰,竹孝鹏, 等. 最大概似法在多普勒激光测风雷达中的应用研究[J].光学仪器, 2012, 34(5): 28-33.
[4] JIN XIAOHAN, WANG YEFENG, ZHU XIAOPENG, et al. Performance of maximum likelihood estimators of Doppler frequency for coherent Doppler lidar[J]. Optical Instruments, 2012, 34(5): 28-33.
[5] FREHLICH R G, YADLOWSKY M J. Performance of mean frequency estimators for Doppler radar and lidar[J]. Journal of Atmospheric &Oceanic Technology, 1994, 11(5): 1217.
[6] 贾晓东. 1.55 滋m相干测风激光雷达样机的研制[D]. 合肥：中国科学技术大学, 2015.
[7] COSTA E, PAULA E R D, REZENDE L F C, et al. Equatorial scintillation calculations based on coherent scatter radar and C/NOFS data[J].Radio Science, 2016, 46(2): 1-21.
[8] 竹孝鹏,刘继桥,刁伟峰,等.相干多普勒测风激光雷达研究[J].红外,2012, 33(2): 8-12.
[9] MATHEWS J D. Incoherent scatter radar probing of the 60-100-km atmosphere and ionosphere[J]. IEEE Transactions on Geoscience & Remote Sensing, 1986, GE-24(5): 765-776.
[10] HYSELL D L, WOODMAN R F. Imaging coherent backscatter radar observations of topside equatorial spread F[J]. Radio Science, 2016, 32(6): 2309-2320.
[11] MEYERM G, SAHR J D. Passive coherent scatter radar interferometer implementation, observations, and analysis[J]. Radio Science, 2016, 39(3): 1-10.
[12] 邢晓晴. 相干激光测风雷达大气探测方法实验研究[D]. 哈尔滨：哈尔滨工业大学, 2016.