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Content Provider | IET Digital Library |
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Author | Huang, Huixin Xu, Chi Xia, Linghao Wu, Cheng |
Abstract | Light Detection and Ranging (lidar) technology has been applied in military and civil areas and shows great potential. However, in coherent lidar detection, significant Doppler Effect and velocity uncertainty result a bad influence on moving target ranging. In this study, the authors demonstrate a velocity compensation method based on both Doppler shift evaluation and velocity searching and matching method. The authors used dot-linear frequency modulation signal for detection in order to achieve both velocity and distance information in the same period. Further by using searching and matching processing based on Shannon entropy can give a better-compensated velocity to extract more accurate distance information of targets. The authors applied this method on passive and self-driving moving targets, which fit the actual characteristics of both kinds of targets. Especially in self-driving moving target, there exists a significant target fluctuation in movement during detection that causes the splitting of Doppler peaks. The blurry in velocity estimation restricts the accuracy of sensing. The authors found the Shannon entropy searching method could reduce this effect. On the other hand, the feature of fluctuation in micro movement may give a way to identify the targets in the future. |
Starting Page | 7065 |
Ending Page | 7068 |
Page Count | 4 |
Volume Number | 2019 |
e-ISSN | 20513305 |
Issue Number | Issue 20, Oct (2019) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/joe/2019/20 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0524 |
Journal | The Journal of Engineering |
Publisher | The Institution of Engineering and Technology |
Publisher Date | 2019-07-11 |
Access Restriction | Open |
Rights License | Creative Commons Attribution-Non Commercial-No Derivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/) |
Subject Keyword | Acceleration Coherent CW Lidar Coherent Lidar Detection Doppler Effect Doppler Shift Dot-linear Frequency Modulation Signal Entropy Frequency Modulation Light Detection And Ranging Technology Modulation And Coding Method Moving Target Detection Moving Target Ranging Object Detection Optical Radar Optimisation Technique Rotation Measurement Search Problem Shannon Entropy Searching Method Signal Detection Velocity Velocity Compensation Method Velocity Matching Method Velocity Measurement Velocity Searching Method |
Content Type | Text |
Resource Type | Article |
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