Abstract
We propose an experimental demonstration of sparse code multiple access (SCMA) based visible light communications (VLC) system, in which the multi-dimensional codewords selected from a predefined codebook set are used to encode the transmitted data and a message passing algorithm (MPA) based multi-user receiver is used to detect the multiplexed codewords. Compared with the orthogonal frequency-division multiple access scheme, the SCMA scheme offers 150% overloading gain in the number of supported users at the cost of slightly decreased transmission performance.
Original language | English |
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Pages (from-to) | 36-40 |
Journal | Optics Communications |
Volume | 419 |
Early online date | 15 Mar 2018 |
DOIs | |
Publication status | Published - 15 Jul 2018 |
Keywords
- Visible light communications (VLC)
- Sparse code multiple access (SCMA)
- Orthogonal frequency-division multiple access (OFDMA)