Inter-Symbol Differential Detection-Enabled Sampling Frequency Offset Compensation for DDO-OFDM

被引：13
作者：
Chen, Ming [1 ]
Liu, Gang [1 ]
Zhou, Hui [2 ]
Chen, Qinghui [3 ]
He, Jing [4 ]
机构：
[1] Hunan Normal Univ, Sch Phys & Elect, Changsha 410081, Hunan, Peoples R China
[2] Hunan Normal Univ, Coll Informat Sci & Engn, Changsha 410081, Hunan, Peoples R China
[3] Hunan Univ Technol, Coll Comp & Commun, Zhuzhou 412007, Peoples R China
[4] Hunan Univ, Coll Comp Sci & Elect Engn, Changsha 410082, Hunan, Peoples R China
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2018年 / 30卷 / 24期
基金：
中国国家自然科学基金;
关键词：
Orthogonal frequency-division multiplexing (OFDM); sampling frequency offset (SFO); inter-symbol differ-ential encoding/detection; direct-detection; SYNCHRONIZATION; SCHEME;
D O I：
10.1109/LPT.2018.2877723
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Sampling frequency offset (SFO) between digital-toanalog converters and analog-to-digital converters will seriously degrade the receiver performance of the asynchronous direct-detection optical OFDM (DDO-OFDM), due to the SFO-induced inter-symbol interference, inter-channel interference, and phase rotation. In this letter, a simple and overhead-free SFO compensation scheme enabled by inter-symbol differential detection (ISDD) is proposed and experimentally demonstrated in a short-reach and low-cost directly modulated laser-based DDO-OFDM system with an optimal fast Fourier transform size. The experimental results exhibit that the SFO up to +/- 200 ppm can be compensated with acceptable error vector magnitude (EVM) penalties after 20-km standard single-mode fiber transmission. Moreover, the EVM performance can be further enhanced by using a decision-aided residual phase compensation method after ISDD when SFO is large.
引用
收藏
页码：2095 / 2098
页数：4
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