Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10135661 | Optics Communications | 2019 | 8 Pages |
Abstract
In this paper, we propose a novel I-Q-Time 3-dimensional post-equalization scheme utilizing density-based spatial clustering of applications with noise (DBSCAN). The system performance can be successfully improved for a carrier-less amplitude and phase modulated (CAP) visible light communication (VLC) systems with the amplitude and phase erratic fluctuations. Furthermore, we experimentally demonstrate a 1.13Â Gb/s 16-QAM CAP VLC system with a red chip LED over 1m indoor free space transmission under the hard decision-forward error correction (HD-FEC) threshold of 3.8 Ã10â3, which is affected by severe fluctuations. The key parameters of the algorithm in 16-QAM CAP VLC systems are evaluated. By employing our proposed method, Q factor improves by 1.5â¼2.5 dB in the system with fluctuations amplitude peak is 70% of the signal. As far as we know, this is the first time that the DBSCAN has been successfully applied to QAM modulated system.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Xingyu Lu, Liang Qiao, Yingjun Zhou, Weixiang Yu, Nan Chi,