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

Mumtaz Ali, Bo Dai, Xu Wang

Research output: Contribution to journalArticle

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

Fingerprint

quadrature amplitude modulation
Quadrature amplitude modulation
misalignment
Orthogonal frequency division multiplexing
Bit error rate
frequency division multiplexing
evaluation
Transmitters
bit error rate
interference
transmitters
Interference suppression
Intersymbol interference
Electric delay lines
deviation
Interferometers
delay lines
Degradation
interferometers
receivers

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

Cite this

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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 = 10-3, 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.",
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16-QAM all-optical OFDM system performance evaluation with time and frequency offsets. / Ali, Mumtaz; Dai, Bo; Wang, Xu.

In: Microwave and Optical Technology Letters, Vol. 57, No. 7, 07.2015, p. 1593-1597.

Research output: Contribution to journalArticle

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