16-QAM all-optical OFDM system performance evaluation with time and frequency offsets

Mumtaz Ali, Bo Dai, Xu Wang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In an all-optical orthogonal frequency division multiplexing (AO-OFDM) system, symbol time misalignment (STM) and subcarrier frequency offset (ScFO) between transmitter and receiver result in intercarrier interference (ICI) and intersymbol interference, leading to a degradation of the system performance. In this article, an analytical study of the impacts of STM and ScFO on the bit error rate (BER) performance of superchannel based on 16-QAM modulated all-optical OFDM transmitter with coherent detection is conducted. Under the condition BER = 10<sup>-3</sup>, maximum acceptable relative deviations for the STM and ScFO are 3.2 and 5.5% in AO-OFDM system. A delay line interferometer (DLI)-based ICI suppression method is proposed, and the results demonstrate that the tolerances to relative deviations for the STM and ScFO increase to 29 and 10% without cyclic prefix.

Original languageEnglish
Pages (from-to)1593-1597
Number of pages5
JournalMicrowave and Optical Technology Letters
Volume57
Issue number7
DOIs
Publication statusPublished - Jul 2015

Keywords

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

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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