摘要
Aiming at coherence degradation during target detection,a suppressing method based on frequency-modulated continuous wave coherent lidar is proposed.Combined 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 restoration.Simulation and field experiment results show that this proposed method can recover the intrapulse coherence in long-pulse echo signals.In 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.
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(Key Laboratory of Space Laser Communication and Detection Technology,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Department of Aerospace Laser Engineering,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China)
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)。
