NOMA for MIMO visible light communications: A spatial domain perspective

Chen Chen, Yanbing Yang, Xiong Deng, Pengfei Du, Helin Yang, Zhengchuan Chen, Wen De Zhong

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

6 Citations (Scopus)


In this paper, we propose a novel non-orthogonal multiple access (NOMA) technique from a spatial domain (SD) perspective for indoor multiple-input multiple-output visible light communication (MIMO- VLC) systems. By fully exploiting the spatial distributions of light-emitting diode (LED) transmitters in the ceiling and users over the receiving plane, SD-NOMA is achieved by assigning all the users to different LEDs in the MIMO-VLC system. Hence, each user only receives data from a specific LED and users assigned to the same LED can use the overall modulation bandwidth of the system. Moreover, a signal-to-noise ratio (SNR) based LED selection scheme is further proposed for each user to efficiently select its desired LED. The achievable rates of a general indoor MIMO-VLC system using conventional MIMO orthogonal frequency division multiple access (MIMO-OFDMA) and the proposed SD-NOMA are analytically derived. The superiority of SD-NOMA over conventional MIMO-OFDMA for multi-user MIMO-VLC systems is successfully verified by detailed analytical results.

Original languageEnglish
Title of host publication2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers
Number of pages6
ISBN (Electronic)9781728109626
Publication statusPublished - Dec 2019
Event2019 IEEE Global Communications Conference (GLOBECOM 2019) - Waikoloa, United States
Duration: 9 Dec 201913 Dec 2019


Conference2019 IEEE Global Communications Conference (GLOBECOM 2019)
Country/TerritoryUnited States


  • LED selection
  • Multipleinput multiple-output (MIMO)
  • Non-orthogonal multiple access (NOMA)
  • Spatial domain
  • Visible light communication (VLC)


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