光通信技术2024，Vol.48Issue(1)：85-89,5.DOI:10.13921/j.cnki.issn1002-5561.2024.01.016
基于改进VMD-WTFD算法的二次谐波光谱信号反演分析
Second harmonic spectral signal inversion analysis based on improved VMD-WTFD algorithm
摘要
Abstract
When using the variational mode decomposition and wavelet threshold adjustment function(VMD-WTFD)algorithm to deal with noise,the signal waveform recovery often deviates from the standard harmonic signal,resulting in deviations of the inversion results.An improved VMD-WTFD algorithm is proposed,which uses a new threshold function to improve the VMD-WTFD algorithm,and then uses this improved algorithm to perform inversion analysis on the second harmonic spectral sig-nal.The simulation and experimental results show that compared with several other denoising algorithms,the improved VMD-WTFD algorithm can invert the peak,peak position,and peak valley values of the original signal under different modulat ion degrees more closely to the original standard second harmonic spectral signal,with a signal-to-noise ratio of 17.545 dB and a correlation coefficient of 0.9929 after denoising.It can clearly invert the second harmonic amplitude of CO2 in human exhaled gas.关键词
可调谐二极管激光吸收光谱/阈值函数/二次谐波/波形恢复/信噪比Key words
tunable diode laser absorption spectrum/threshold function/second harmonics/waveform recovery/signal-to-noise ratio分类
信息技术与安全科学引用本文复制引用
王战,涂兴华,张瑞林..基于改进VMD-WTFD算法的二次谐波光谱信号反演分析[J].光通信技术,2024,48(1):85-89,5.基金项目
国家自然科学基金项目(批准号:GZ216003)资助 （批准号:GZ216003）
南京邮电大学校科研基金项目(批准号:NY217111)资助. （批准号:NY217111）
