Weighted Inter-frame Averaging-Based Channel Estimation for CO-OFDM System

Hui Zhao; Juhao Li; Paikun Zhu; Cheng Zhang; Yue Liu; Yuping Zhao; Yongqi He; Zhangyuan Chen

doi:10.1109/JPHOT.2013.2292355

IEEE Photonics Journal (Jan 2013)

Weighted Inter-frame Averaging-Based Channel Estimation for CO-OFDM System

Hui Zhao,
Juhao Li,
Paikun Zhu,
Cheng Zhang,
Yue Liu,
Yuping Zhao,
Yongqi He,
Zhangyuan Chen

Affiliations

Hui Zhao: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, China
Juhao Li: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, China
Paikun Zhu: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, China
Cheng Zhang: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, China
Yue Liu: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, China
Yuping Zhao: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, China
Yongqi He: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, China
Zhangyuan Chen: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, China

DOI: https://doi.org/10.1109/JPHOT.2013.2292355
Journal volume & issue: Vol. 5, no. 6
pp. 7902807 – 7902807

Abstract

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We propose an efficient channel estimation method for coherent optical orthogonal frequency-division multiplexing (CO-OFDM) based on weighted inter-frame averaging (WIFA), in which the channel estimation results of the adjacent frames are averaged to increase the estimation accuracy. The principle of the proposed WIFA method is theoretically analyzed, and the benefit is demonstrated by a polarization-division-multiplexed CO-OFDM transmission experiment. The channel magnitude and phase differences among adjacent frames are investigated. The effectiveness of WIFA method, combined with conventional least square method, time-domain averaging method, and intra-symbol frequency-domain averaging method, respectively, is demonstrated through 240-km standard single-mode fiber transmission with different launched power values. The experimental results show that the WIFA method can significantly enhance transmission performance.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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