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 |
|---|---|
| Pages (from-to) | 36-40 |
| Number of pages | 5 |
| Journal | Optics Communications |
| Volume | 419 |
| DOIs | |
| State | Published - 15 Jul 2018 |
| Externally published | Yes |
Keywords
- Orthogonal frequency-division multiple access (OFDMA)
- Sparse code multiple access (SCMA)
- Visible light communications (VLC)