Title :
The study of wavelet de-noising in multi-span nonlinear intensity-modulated fiber communication systems
Author :
Xiang, Lian ; Shao, Qun Feng ; Zhang, Xiao Ping
Author_Institution :
Sch. of Inf. Sci. & Eng., Lanzhou Univ., Lanzhou, China
Abstract :
In this work, wavelet de-noising with several different types of wavelets such as db4, coif4 and dmey wavelets was applied at the end of the multi-span intensity-modulated fiber communication systems. The results of numerical simulations carried out in different fiber links demonstrated that the wavelet de-noising method could remove the random amplitude fluctuation and pulse breaking induced by the interaction of ASE noise and fiber dispersion and nonlinearity. The normalized energy deviation (NED) of the signal without and with de-noising in dispersion compensation fiber link were plotted to show the effectiveness of the wavelet de-noising in the fiber-optic communication systems and wavelet de-noising with demy wavelet can achieve better result than with other type wavelet.
Keywords :
numerical analysis; optical fibre communication; wavelet transforms; coif4; db4; demy wavelet; dispersion compensation fiber link; dmey wavelets; fiber links; fiber-optic communication systems; multispan nonlinear intensity-modulated fiber communication systems; normalized energy deviation; numerical simulations; pulse breaking; random amplitude fluctuation; wavelet de-noising; wavelet denoising method; Fiber nonlinear optics; High speed optical techniques; Noise reduction; Optical fiber communication; Optical filters; Optical interferometry; Optical noise; Optical signal processing; Phase noise; Wavelet transforms; Optical fiber communication; nonlinearities; optical signal processing; wavelet transforms;
Conference_Titel :
Wireless and Optical Communications Conference (WOCC), 2010 19th Annual
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-7597-1
DOI :
10.1109/WOCC.2010.5510608
