Distance-Range-Oriented Constellation Design for VLC-SCMA Downlink with Signal-Dependent Noise

Qian Gao, Shuping Hu, Chen Gong, Erchin Serpedin, Khalid Qaraqe, Zhengyuan Xu

Research output: Contribution to journalArticle

Abstract

In this letter, the constellation design for a sparse code multiple access-based visible light communication downlink is studied. The noise at the receiving avalanche photodiode is dependent on the signal intensity, and the associated design problems are typically intractable. We point out that for such a system, both the minimum Euclidean distance (MED) and rotated-MED-based methods are not the optimal optimization objective, and propose a distance-range-oriented (DRO) modulation, where a linear combination of the minimum and maximum Euclidean distance is considered. We observe in the simulation results that the proposed DRO-based scheme outperforms the MED and rotated-MED-based ones across a wide range of signal and noise levels.

Original languageEnglish
Article number8610189
Pages (from-to)434-437
Number of pages4
JournalIEEE Communications Letters
Volume23
Issue number3
DOIs
Publication statusPublished - 1 Mar 2019

Fingerprint

Euclidean Distance
Minimum Distance
Avalanche photodiodes
Dependent
Range of data
Modulation
Avalanche Photodiode
Multiple Access
Linear Combination
Design
Optimization
Simulation
Visible light communication

Keywords

  • Constellation design
  • distance range
  • SCMA
  • signal-dependent noise
  • visible light communication

ASJC Scopus subject areas

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering

Cite this

Distance-Range-Oriented Constellation Design for VLC-SCMA Downlink with Signal-Dependent Noise. / Gao, Qian; Hu, Shuping; Gong, Chen; Serpedin, Erchin; Qaraqe, Khalid; Xu, Zhengyuan.

In: IEEE Communications Letters, Vol. 23, No. 3, 8610189, 01.03.2019, p. 434-437.

Research output: Contribution to journalArticle

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