Pilot-based bind phase estimation method for coherent optical OFDM

Author

Xuebing Zhang ; Jianping Li ; Chao Li ; Ming Luo ; Haibo Li ; Zhixue He ; Qi Yang ; Zhaohui Li

Author_Institution

Inst. of Photonics Technol., Jinan Univ., Guangzhou, China

fYear

2014

fDate

9-10 Nov. 2014

Firstpage

1

Lastpage

3

Abstract

In this paper, a pilot-based blind (PBB) phase estimation method for coherent optical orthogonal frequency-division multiplexing (CO-OFDM) is proposed. Instead of inserting the pilot-subcarriers that are loaded with the already known information in the OFDM signal, the unknown and specially designed signal is used to replace the signal on the pilot subcarriers to decrease the waste of spectrum and also demonstrated well performance for the phase noise compensation. Both the proposed PBB and conventional pilot-aided (PA) estimation methods are demonstrated in a CO-OFDM transmission experiment, which is modulated by 4 quadrature amplitude modulation (4-QAM) format and transmitted over 1760-km standard single-mode fiber (SSMF). The experimental results show that the proposed PBB method still achieves the similar performance to that of the conventional PA method.

Keywords

OFDM modulation; optical fibre communication; optical modulation; phase estimation; quadrature amplitude modulation; PBB phase estimation; QAM; SSMF transmission; optical OFDM; optical orthogonal frequency-division multiplexing; phase noise compensation; pilot-based blind phase estimation method; pilot-subcarriers insertion; quadrature amplitude modulation; standard single-mode fiber; Estimation; OFDM; Optical fibers; Optical noise; Optical receivers; Phase noise; Blind estimation; CO-OFDM; Phase noise estimation;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical Communications and Networks (ICOCN), 2014 13th International Conference on

Conference_Location

Suzhou

Type

conf

DOI

10.1109/ICOCN.2014.6987099

Filename

6987099