Performance evaluation of superchannels using all-optical M-QAM OFDM and coherent receiver in the presence of time and frequency offsets

Mumtaz Ali, Bo Dai, Xu Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In the presence of OFDM symbol time misalignment (STM) and subcarrier frequency offset (ScFO) in an all-optical orthogonal frequency division multiplexing (AO-OFDM) system, the BER performance degraded due to intercarrier interference (ICI) and intersymbol interference. In this paper, an analytical study of the impacts of ScFO and STM on BER performance of M-QAM AO-OFDM system is conducted. The numerical results of the realistic AO-OFDM system are compared with an odd-and-even and a decorrelated emulation setups for precise estimation of STM and ScFO tolerances. For BER=10-3, maximum acceptable relative deviations for the STM and the ScFO are 3.2% and 5.5% for the realistic AO-OFDM system. Finally, the minimum requirements of cyclic prefix (CP) are evaluated, and it is demonstrated that the STM variance is reduced by 3.3 dB at half of data rate, while the 1.8 × subcarrier spacing is required to reduce the ScFO variance by 6.9 dB.

Original languageEnglish
Title of host publication2014 9th International Conference on Communications and Networking in China (CHINACOM)
PublisherIEEE
Pages293-297
Number of pages5
ISBN (Electronic)9781479959709
DOIs
Publication statusPublished - 2014
Event9th International Conference on Communications and Networking in China 2014 - Maoming, China
Duration: 14 Aug 201416 Aug 2014

Conference

Conference9th International Conference on Communications and Networking in China 2014
Abbreviated titleCHINACOM 2014
CountryChina
CityMaoming
Period14/08/1416/08/14

Keywords

  • All-optical orthogonal frequency division multiplexing
  • coherent communications
  • optical communications

ASJC Scopus subject areas

  • Communication
  • Computer Networks and Communications

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