Efficiency Improvement for Optical OFDM Systems

Author:

Ghanbarisabagh Mohammad1,Maloulki Nasreddine2,Nsiri Bechir2

Affiliation:

1. Faculty of Engineering, Islamic Azad University North Tehran Branch, Tehran, Iran

2. Sys’comLab, ENIT, Le Belve´de`re, Tunis, Tunisia

Abstract

The evaluation of Optical Orthogonal Frequency Division Multiplexing (OOFDM) using Least Mean Square Time-domain Equalizer (LMSTE), Recursive Least Squares-Time-domain Equalizer (RLSTE) and Decision Feedback Time-domain Equalizer (DFTE) to reduce Cyclic Prefix (CP) length over 1200 Km of Standard Single Mode Fiber (SSMF) is presented. All of these TEQs are used immediately after the fiber channel. They can cancel the residual Inter Symbol Interference (ISI) and Inter Carrier Interference (ICI) caused by both the Group Velocity Dispersion (GVD) and the CP length being shorter than the Channel Impulse Response (CIR). Using these TEQs allow the reduction in size of CP, and consequently leading to system performance improvement. DFTE can decrease the noise whereas RLSTE can achieve a higher convergence and better performance compared to LMSTE.

Publisher

Science Publishing Group

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