Decision-Aided, Pilot-Aided, Decision-Feedback Phase Estimation for Coherent Optical OFDM Systems

Author

Cao, Shengjiao ; Kam, Pooi Yuen ; Yu, Changyuan

Author_Institution

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore

Volume

24

Issue

22

fYear

2012

Firstpage

2067

Lastpage

2069

Abstract

We propose two phase estimation methods for coherent optical orthogonal frequency-division multiplexing (OFDM) systems, the decision-aided (DA) plus pilot-aided (PA) scheme and DA plus decision feedback (DF) scheme. We further investigate the combinations of DA, PA, and DF in a simulated 40-Gb/s single polarization system. DA+PA helps to increase the phase noise tolerance of DA and reduce the overhead of PA, while DA+DF reduces the overhead to zero and achieves the best performance with one more step of estimation, compensation, and demodulation.

Keywords

OFDM modulation; automatic repeat request; demodulation; light coherence; light polarisation; optical noise; phase estimation; phase noise; DF scheme; bit rate 50 Gbit/s; coherent optical OFDM systems; coherent optical orthogonal frequency-division multiplexing systems; decision-aided pilot-aided decision-feedback phase estimation; demodulation; phase estimation methods; phase noise tolerance; simulated single polarization system; Demodulation; Laser noise; OFDM; Optical noise; Optical receivers; Phase estimation; Phase noise; Coherent; laser phase noise; orthogonal frequency-division multiplexing (OFDM); phase estimation;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2012.2219522

Filename

6316081