Bias allocation and precoding for tricolor visible light communications with signal-dependent noise

Qian Gaol, Sabit Ekin, Khalid Qaraqe, Erchin Serpedin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Wavelength-domain multiplexing enables near parallel transmission for visible light communications (VLC). In this paper, we investigate an optimal bias allocation problem for the tri-color VLC channel when there is no color cross-talk (CoC), and propose a joint precoding and bias allocation algorithm when CoC exists. The optimization problems are formulated considering both lighting and communication requirements. The color constraint is depicted using the MacAdam ellipses on the chromaticity diagram, as an effective relaxation from a fixed point restriction. Also, for practical concerns, the addressed system is affected by signal-dependent noise (SDN). The bias allocation problem under SDN and related constraints is shown to be non-convex, thus a convex-concave procedure is utilized in this paper for convexification. The joint design problem is also non-convex, and an iterative optimization procedure is adopted, where the decoder is of Wiener filter form. Simulation results are given to show the impacts of SDN, CoC, and steps of MacAdam ellipses on system performance.

Original languageEnglish
Title of host publicationProceedings of 2019 25th Asia-Pacific Conference on Communications, APCC 2019
EditorsVo Nguyen Quoc Bao, Tran Thien Thanh
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages61-66
Number of pages6
ISBN (Electronic)9781728136790
DOIs
Publication statusPublished - Nov 2019
Event25th Asia-Pacific Conference on Communications, APCC 2019 - Ho Chi Minh City, Viet Nam
Duration: 6 Nov 20198 Nov 2019

Publication series

NameProceedings of 2019 25th Asia-Pacific Conference on Communications, APCC 2019

Conference

Conference25th Asia-Pacific Conference on Communications, APCC 2019
CountryViet Nam
CityHo Chi Minh City
Period6/11/198/11/19

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ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture
  • Information Systems and Management
  • Safety, Risk, Reliability and Quality
  • Control and Optimization

Cite this

Gaol, Q., Ekin, S., Qaraqe, K., & Serpedin, E. (2019). Bias allocation and precoding for tricolor visible light communications with signal-dependent noise. In V. N. Q. Bao, & T. T. Thanh (Eds.), Proceedings of 2019 25th Asia-Pacific Conference on Communications, APCC 2019 (pp. 61-66). [9026507] (Proceedings of 2019 25th Asia-Pacific Conference on Communications, APCC 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APCC47188.2019.9026507