کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7125456 | 1461536 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An improved Newton algorithm based on finite element analysis for extracting the Brillouin scattering spectrum features
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
کنترل و سیستم های مهندسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: An improved Newton algorithm based on finite element analysis for extracting the Brillouin scattering spectrum features An improved Newton algorithm based on finite element analysis for extracting the Brillouin scattering spectrum features](/preview/png/7125456.png)
چکیده انگلیسی
In the distributed optical fiber sensing system based on Brillouin scattering, the photodetector offers the low signal-to-noise ratio (SNR) and can hardly demodulate complicated information. An improved Newton algorithm based on finite element analysis (FEA-Newton algorithm) is proposed to extract the estimated parameters of Brillouin scattering spectrum from noisy signals accurately. By using the FEA-Newton algorithm, the relationship of the linewidth vs center frequency shift error and SNR vs center frequency shift error are both analyzed and the Brillouin center frequency shifts are extracted. Within a certain range of initial value, the accuracy of the Newton and FEA-Newton algorithms are compared. The measured Brillouin shift of FEA-Newton algorithm is match with theoretical values. The FEA-Newton algorithm is more preferably to extract the Brillouin scattering spectrum features.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Measurement - Volume 51, May 2014, Pages 310-314
Journal: Measurement - Volume 51, May 2014, Pages 310-314
نویسندگان
Yanjun Zhang, Chunjuan Yu, Xinghu Fu, Da Li, Wei Jia, Weihong Bi,