Time and frequency synchronisation in all-optical orthogonal frequency division multiplexing systems

被引：3

作者：

Ali, Mumtaz ^{[1
]}

Dai, Bo ^{[1
,2
]}

Wang, Xu ^{[1
]}

机构：

[1] Heriot Watt Univ, Sch Engn & Phys Sci, Inst Photon & Quantum Sci IPaQS, Edinburgh EH14 4AS, Midlothian, Scotland

[2] Univ Shanghai Sci & Technol, Engn Res Ctr Opt Instrument & Syst, Minist Educ, Shanghai Key Lab Modern Opt Syst, Shanghai 200093, Peoples R China

来源：

IET COMMUNICATIONS | 2015年 / 9卷 / 05期

关键词：

OFDM modulation; optical modulation; synchronisation; intercarrier interference; intersymbol interference; optical communication; frequency synchronisation; time synchronisation; all-optical orthogonal frequency division multiplexing systems; AO-OFDM systems; symbol time misalignment; STM; subcarrier frequency offset; ScFO; intercarrier-interference; bit error rate; BER performance degradation; receiver bandwidth; cyclic prefix requirements; optical subcarriers; homodyne detection; bandwidth; 30; GHz; WAVE-GUIDE GRATINGS; OFDM SYSTEMS; COHERENT DETECTION; PERFORMANCE; OFFSET;

D O I：

10.1049/iet-com.2014.0652

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：

In all-optical orthogonal frequency division multiplexing (AO-OFDM) systems, symbol time misalignment (STM) and subcarrier frequency offset (ScFO) result in intercarrier-interference and intersymbol interference, leading to degradation of bit error rate (BER) performance. In this study, an analytical study of the impacts of STM and ScFO on AO-OFDM system performance is conducted. In the presence of STM and ScFO, AO-OFDM system performance is evaluated with the number of subcarriers (N-SC), cyclic prefix requirements and receiver bandwidth (BWRX). For AO-OFDM system without CP, results show that the STM gives higher BER than the ScFO. To keep the BER below 10(-3) in AO-OFDM systems with on-off keying-modulated three optical subcarriers and homodyne detection with BWRX = 30 GHz, the maximum acceptable relative deviations for the STM and the ScFO are 11 and 14%, respectively.

引用

页码：630 / 637

页数：8

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[3]

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