基于混合卷积窗的激光多普勒信号处理研究

IF 0.9 4区物理与天体物理 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

激光与光电子学进展 Pub Date : 2023-01-01 DOI:10.3788/lop222062

陈昊 Chen Hao, 张达 Zhang Da

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引用次数: 0

摘要

快速傅里叶变换是激光多普勒测速系统信号处理的一种常用方法，但在异步采样时存在频谱泄漏和栏栅效应，其处理精度偏低。为了提高检测精度，提出基于Nuttall窗函数和五项最大旁瓣衰减窗函数的混合卷积窗改进六谱线插值校正算法。混合卷积窗在保证良好的旁瓣特性的同时也能保证主瓣不过宽，改进六谱线插值可有效抑制栏栅效应在参数估计过程中的负面影响，提高分析精度。为了避免解高次方程，提出三次B样条插值来拟合插值系数，并推导出改进六谱线插值的频率校正公式。搭建了双光束后向散射差动式激光多普勒测速平台，利用仿真数据和实测信号验证了本文算法在低信噪比环境下有较好的频率和速度测量精度。

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基于混合卷积窗的激光多普勒信号处理研究

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来源期刊

激光与光电子学进展 Multiple-

CiteScore

1.60

自引率

50.00%

发文量

18006

期刊介绍： Laser & Optoelectronics Progress, the first laser and optoelectronics journal published in China. The main columns include general, lasers and laser optics, fiber optics and optical communications, optical design and fabrication, materials, image processing, imaging systems, optical devices, remote sensing and sensors, atmospheric optics and oceanic optics, diffraction and gratings, atomic and molecular physics, detectors, thin films, ultrafast optics, etc. The journal is included in ESCI, INSPEC, Scopus, CSCD, Chinese Core Journals, Chinese Science and Technology Core Journals, and T2 level of the Classified Catalogue of High Quality Science and Technology Journals in Optical Engineering and Optical Fields, and other databases.