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Low-PAPR ASE-DMT Using Constellation Extension for Optical Wireless Communications.

Yue Wu1, Yiding Li2, Baolong Li2

  • 1Changwang School of Honors, Nanjing University of Information Science and Technology, Nanjing 210044, China.

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Summary
This summary is machine-generated.

A new low peak-to-average power ratio (PAPR) augmented spectral efficiency discrete multitone (ASE-DMT) scheme reduces signal distortion in optical wireless communication. This advancement improves bit error rate, power efficiency, and spectral efficiency.

Keywords:
augmented spectral efficiency discrete multitone (ASE-DMT)constellation extensionoptical wireless communication (OWC)peak-to-average power ratio

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Area of Science:

  • Optical Wireless Communication (OWC)
  • Digital Signal Processing

Background:

  • Augmented spectral efficiency discrete multitone (ASE-DMT) offers high spectral and power efficiency in OWC.
  • ASE-DMT's high peak-to-average power ratio (PAPR) causes error propagation and performance degradation, especially in successive interference cancellation (SIC) receivers.

Purpose of the Study:

  • To propose a novel low-PAPR ASE-DMT (LP-ASE-DMT) scheme to mitigate PAPR issues.
  • To develop an effective PAPR suppression algorithm with reduced computational complexity.
  • To design a receiver architecture that accommodates the proposed scheme without significant complexity increase.

Main Methods:

  • A progressive multi-level constellation extension algorithm is developed to suppress PAPR.
  • A dedicated receiver architecture featuring a low-complexity modulo operation is designed.
  • Simulations are used to validate the effectiveness of the LP-ASE-DMT scheme.

Main Results:

  • The proposed LP-ASE-DMT scheme significantly reduces PAPR compared to conventional methods.
  • The scheme demonstrates enhanced robustness against nonlinear impairments.
  • Substantial improvements in bit error rate (BER), power efficiency, and spectral efficiency are achieved.

Conclusions:

  • LP-ASE-DMT effectively suppresses PAPR in ASE-DMT systems.
  • The proposed scheme offers superior performance in OWC, addressing key limitations of existing methods.
  • LP-ASE-DMT presents a promising solution for advanced optical wireless communication systems.