High-Precision Coherent Laser Ranging Method Based on Kalman Filtering

被引：7

作者：

Zhao Xiao ^{[1
]}

Yang Haima ^{[1
]}

Qiang Jia ^{[2
]}

Liu Jin ^{[3
]}

Wang Jianyu ^{[2
]}

机构：

[1] Univ Shanghai Sci & Technol, Coll Optoelect Informat & Comp Engn, Shanghai 200093, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Tech Phys, Shanghai 200083, Peoples R China

[3] Shanghai Univ Engn Sci, Coll Elect & Elect Engn, Shanghai 201620, Peoples R China

来源：

ACTA OPTICA SINICA | 2020年 / 40卷 / 14期

关键词：

measurement; remote sensing; coherent lidar; frequency modulated continuous wave; Kalman filter; data fusion; RATE DETECTION LADAR; DYNAMIC-RANGE;

D O I：

10.3788/AOS202040.1412001

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A high-precision coherent laser ranging method based on Kalman filtering is proposed using a single-linear frequency modulated continuous wave (S-LFMCW) laser as the transmitting signal. By measuring the beat frequency between the echo signal and the local oscillator signal, the frequency difference is first obtained. The distance and speed of the target arc then calculated with this frequency difference signal through analog-to-digital conversion and digital signal processing. Finally, the Kalman filter algorithm is used to fuse the measured data, and the target distance estimation is obtained with high accuracy. The experimental results show that the proposed method is suitable for large-scale dynamic coherent laser ranging lidar systems. The effective ranging range of the system is 8 m to 2. 7 km, and the ranging accuracy is within 0.1 m.

引用

页数：9

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