Rotated Color Shift Keying for Visible Light Communications with Signal-Dependent Noise

Qian Gao, Khalid Qaraqe, Erchin Serpedin

Research output: Contribution to journalArticle


This letter proposes three distinct modulation schemes belonging to the class of rotated color-shift keying (CSK) to improve the performance of regular CSK over a tricolor visible light communications (VLC) channel subject to signal-dependent noise (SDN). In such channels, regular CSK schemes suffer from a severe constellation distortion. The proposed rotated CSK schemes termed respectively separative whitening-like rotation (SWR), multiplicative whitening-like rotation (MWR), and additive whitening-like rotation (AWR), provide error rate gains relative to the regular CSK. The proposed modulations are carried out by employing practical lighting constraints, including a relaxed color constraint by the MacAdam ellipses with appropriate steps.

Original languageEnglish
Article number8964565
Pages (from-to)844-848
Number of pages5
JournalIEEE Communications Letters
Issue number4
Publication statusPublished - Apr 2020



  • Energy efficiency
  • Multidimensional signal processing
  • Visible light communication; Modulation

ASJC Scopus subject areas

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

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