相干激光雷达回波信号脉冲内相干衰减抑制方法

IF 3.3 2区物理与天体物理 Q2 OPTICS

Chinese Optics Letters Pub Date : 2023-01-01 DOI:10.3788/col202321.071201

Haisheng Cong, Jianfeng Sun, Zhiyong Lu, Hongyu He, Weijie Ren, Yuxin Jiang, Lingling Xu, Chaoyang Li, Longkun Zhang, Zhengwei Zhang

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引用次数: 0

摘要

针对目标探测过程中相干性下降的问题，提出了一种基于调频连续波相干激光雷达的抑制方法。结合随机迭代算法，将相干退化的长脉冲回波信号与一定频率的随机相位噪声匹配，实现相干恢复。仿真和现场实验结果表明，该方法可以恢复长脉冲回波信号的脉冲内相干性。此外，对于4.2 km和19.8 km处的真实目标回波信号，经过脉冲压缩后，该方法处理的峰值信噪比分别提高了0.35倍和4倍。

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Intrapulse coherence degradation suppressing method of echo signal in coherent lidar

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.

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来源期刊

Chinese Optics Letters 物理-光学

CiteScore

5.60

自引率

20.00%

发文量

180

审稿时长

2.3 months

期刊介绍： Chinese Optics Letters (COL) is an international journal aimed at the rapid dissemination of latest, important discoveries and inventions in all branches of optical science and technology. It is considered to be one of the most important journals in optics in China. It is collected by The Optical Society (OSA) Publishing Digital Library and also indexed by Science Citation Index (SCI), Engineering Index (EI), etc. COL is distinguished by its short review period (~30 days) and publication period (~100 days). With its debut in January 2003, COL is published monthly by Chinese Laser Press, and distributed by OSA outside of Chinese Mainland.