Intrapulse coherence degradation suppressing method of echo signal in coherent lidar

作     者：从海胜 孙建锋 卢智勇 贺红雨 任伟杰 姜玉鑫 许玲玲 李超洋 张龙坤 张正伟 Haisheng Cong;Jianfeng Sun;Zhiyong Lu;Hongyu He;Weijie Ren;Yucin Jiang;Lingling Xu;Chaoyang Li;Longkun Zhang;Zhengwei Zhang

作者机构：Key Laboratory of Space Laser Communication and Detection TechnologyShanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China Department of Aerospace Laser EngineeringShanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China 

出 版 物：《中国光学快报:英文版》 (Chinese Optics Letters)

年 卷 期：2023年第21卷第7期

页      面：7-15页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 081105[工学-导航、制导与控制] 081001[工学-通信与信息系统] 081002[工学-信号与信息处理] 0825[工学-航空宇航科学与技术] 0811[工学-控制科学与工程] 

基　　金：supported by the National Key Research and Development Program of China(No.2020YFB0408302) the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB43030400) 

主　　题：coherent lidar long-pulse signal coherent degradation frequency modulation continuous wave 

摘      要：Aiming at coherence degradation during target detection,a suppressing method based on frequency-modulated continuous wave coherent lidar is *** with a random iteration algorithm,a long-pulse echo signal with coherent degradation is matched with random phase noise of a certain frequency and achieves coherence *** and field experiment results show that this proposed method can recover the intrapulse coherence in long-pulse echo *** addition,for the real target echo signal at 4.2 and 19.8 km,the peak signal-to-noise ratio processed by this method is increased by 0.35 times and 4 times after pulse compression,respectively.