Frequency-Domain Equalization for Coherent Optical Single-Carrier Transmission Systems

Koichi ISHIHARA
Takayuki KOBAYASHI
Riichi KUDO
Yasushi TAKATORI
Akihide SANO
Yutaka MIYAMOTO

Publication
IEICE TRANSACTIONS on Communications   Vol.E92-B    No.12    pp.3736-3743
Publication Date: 2009/12/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.3736
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
frequency-domain equalization (FDE),  coherent optical transmission,  chromatic dispersion (CD),  polarization mode dispersion (PMD),  digital signal processing (DSP),  

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Summary: 
In this paper, we use frequency-domain equalization (FDE) to create coherent optical single-carrier (CO-SC) transmission systems that are very tolerant of chromatic dispersion (CD) and polarization mode dispersion (PMD). The efficient transmission of a 25-Gb/s NRZ-QPSK signal by using the proposed FDE is demonstrated under severe CD and PMD conditions. We also discuss the principle of FDE and some techniques suitable for implementing CO-SC-FDE. The results show that a CO-SC-FDE system is very tolerant of CD and PMD and can achieve high transmission rates over single mode fiber without optical dispersion compensation.