XIE Ruimin,LONG Feixu,LI Jieyi,et al.Research on Signal Processing Flow and Product Generation of Wind-Measuring Lidar[J].Journal of Chengdu University of Information Technology,2025,40(05):594-599.[doi:10.16836/j.cnki.jcuit.2025.05.004]
激光测风雷达信号处理流程及产品生成研究
- Title:
- Research on Signal Processing Flow and Product Generation of Wind-Measuring Lidar
- 文章编号:
- 2096-1618(2025)05-0594-06
- 分类号:
- TN958.98
- 文献标志码:
- A
- 摘要:
- 研究激光雷达中频信号的处理流程及风场产品的估计算法与数据处理流程,设计并实现完整的测风产品生成软件,实现对回波信号的实时处理、产品的实时生成与显示。在信号处理过程中,提出在功率谱中采用Savitzky-Golay滤波器和谱积累的处理算法,提高了信噪比; 采用3次样条插值算法重新对谱线进行拟合重构,以提高回波多普勒频率的估计精度; 在拟合的基础上,对功率谱进行谱峰识别及质量控制,提高了谱数据的有效性。在产品生成过程中,采用正交波束交叉提取的计算方法以提高实时风廓线产品的生成速度; 使用中值校验、双三次插值对风廓线数据行质量控制,提高了风廓线产品的精度。
- Abstract:
- This paper investigates the intermediate-frequency signal processing flow in Lidar systems and further explores the estimation algorithms and data processing flow for wind field products.A complete wind-measuring product generation software was designed and implemented,enabling real-time processing of echo signals and real-time generation and display of wind products.During signal processing,a Savitzky-Golay filter combined with spectral accumulation was proposed to enhance the signal-to-noise ratio(SNR).Additionally,a cubic spline interpolation algorithm was introduced to refit and reconstruct spectral lines,improving the estimation accuracy of echo Doppler frequency.Based on the fitting results,spectral peak identification and quality control were applied to power spectra to ensure data validity.For product generation,an orthogonal beam-crossing extraction method was proposed to accelerate the real-time generation of wind profile products.Median validation and bicubic interpolation were employed for quality control of wind profile dataand the wind product accuracy was enchanced.
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备注/Memo
收稿日期:2025-06-02
基金项目:四川省科技厅重点研发资助项目(2023YFG0170)
通信作者:王海江.E-mail:whj@cuit.edu.cn