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An efficient modulation technique to mitigate nonlinearities in optical OFDM

Rahman, Muhammad Towfiqur and Jamil, Muhammad Sobrun and Abdullah, Aizura and Islam, Md. Rafiqul and Abdullah, Khaizuran (2014) An efficient modulation technique to mitigate nonlinearities in optical OFDM. In: Australasian Telecommunication Networks and Applications Conference (ATNAC), 2014, 26th-28th November 2014, Melbourne.

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The optical OFDM (O-OFDM) system is a growing technology for next generation high-speed optical communication. Two types of O-OFDM; CO-OFDM (Coherent- Optical OFDM) and Direct-current-based optical OFDM (DCOFDM) are discussed. Mach–Zehnder modulators (MZMs) are used in up-converter part of CO-OFDM system to convert the RF signal to optical signal when the light cannot directly modulate for higher speed. The MZM has a cosine behavior with high nonlinear characteristic that affects the system performance. This paper aims to investigate an efficient pulse modulation technique for mitigating nonlinearity effect in the Mach-Zehnder modulator of CO-OFDM system. It also highlights the proposed method, an efficient CO-OFDM system to solve the existing nonlinearity issue. This technique influences positively on OSNR to reduce non linearity over different distances of optical channel and improve the system performance in terms of power consumption and bandwidth efficiency.

Item Type: Conference or Workshop Item (Invited Papers)
Additional Information: 2887/41438
Uncontrolled Keywords: Optical orthogonal frequency division multiplexing (O-OFDM); MZM; Modulation; Nonlinearity; optical transmission
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunication. Including telegraphy, radio, radar, television
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User: Dr Khaizuran Abdullah
Date Deposited: 16 Feb 2015 09:36
Last Modified: 19 Sep 2017 18:32
URI: http://irep.iium.edu.my/id/eprint/41438

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