Laser Doppler Signal Denoising Based on Wavelet Packet Thresholding Method
المؤلفون المشاركون
المصدر
International Journal of Optics
العدد
المجلد 2019، العدد 2019 (31 ديسمبر/كانون الأول 2019)، ص ص. 1-11، 11ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2019-11-14
دولة النشر
مصر
عدد الصفحات
11
التخصصات الرئيسية
الملخص EN
In laser Doppler velocimeter (LDV), calculation precision of Doppler shift is affected by noise contained in Doppler signal.
In order to restrain the noise interference and improve the precision of signal processing, wavelet packet threshold denoising methods are proposed.
Based on the analysis of Doppler signal, appropriate threshold function and decomposition layer number are selected.
Heursure, sqtwolog, rigrsure, and minimaxi rules are adopted to get the thresholds.
Processing results indicate that signal-to-noise ratio (SNR) and root mean square error (RMSE) of simulated signals with original SNR of 0 dB, 5 dB, and 10 dB in both low- and high-frequency ranges are significantly improved by wavelet packet threshold denoising.
A double-beam and double-scattering LDV system is built in our laboratory.
For measured signals obtained from the experimental system, the minimum relative error of denoised signal is only 0.079% (using minimaxi rule).
The denoised waveforms of simulated and experimental signals are much more smooth and clear than that of original signals.
Generally speaking, denoising effects of minimaxi and saqtwolog rules are better than those of heursure and rigrsure rules.
As shown in the processing and analysis of simulated and experimental signals, denoising methods based on wavelet packet threshold have ability to depress the noise in laser Doppler signal and improve the precision of signal processing.
Owing to its effectiveness and practicability, wavelet packet threshold denoising is a practical method for LDV signal processing.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Zhang, Da& Liu, Ranglei. 2019. Laser Doppler Signal Denoising Based on Wavelet Packet Thresholding Method. International Journal of Optics،Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1166547
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Zhang, Da& Liu, Ranglei. Laser Doppler Signal Denoising Based on Wavelet Packet Thresholding Method. International Journal of Optics No. 2019 (2019), pp.1-11.
https://search.emarefa.net/detail/BIM-1166547
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Zhang, Da& Liu, Ranglei. Laser Doppler Signal Denoising Based on Wavelet Packet Thresholding Method. International Journal of Optics. 2019. Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1166547
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1166547
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر