Abstract
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 language | English |
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| Title of host publication | 2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings |
| Publisher | Institute of Electrical and Electronics Engineers |
| Number of pages | 6 |
| ISBN (Electronic) | 9781728109626 |
| DOIs | |
| Publication status | Published - Dec 2019 |
| Event | 2019 IEEE Global Communications Conference (GLOBECOM 2019) - Waikoloa, United States Duration: 9 Dec 2019 → 13 Dec 2019 |
Conference
| Conference | 2019 IEEE Global Communications Conference (GLOBECOM 2019) |
|---|---|
| Country/Territory | United States |
| City | Waikoloa |
| Period | 9/12/19 → 13/12/19 |
Keywords
- LED selection
- Multipleinput multiple-output (MIMO)
- Non-orthogonal multiple access (NOMA)
- Spatial domain
- Visible light communication (VLC)