期刊
IEEE PHOTONICS JOURNAL
卷 9, 期 5, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOT.2017.2749203
关键词
Multiband carrier-less amplitude and phase modulation; pulse shaping filters; visible light communications
资金
- GACR [17-17538S]
- CTU Grant [SGS17/182/OHK3/3T/13]
- U.K. ESPRC: Multifunctional Polymer Light-Emitting Diodes with Visible Light Communications (MARVEL) [EP/P006280/1]
- EPSRC [EP/P006280/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/P006280/1] Funding Source: researchfish
In pulse shaping filters, parameters such as the roll-off factor and the symbol span, which determine the overall performance, are of great importance when implementing a real-time system due to limited hardware resources. In this paper, we experimentally investigate a multiband carrier-less amplitude and phase (m-CAP) visible light communications (VLC) system employing such filters and assess the link performance for a range of filter lengths and show the relationship between the system data rate (or spectral efficiency) and computational complexity. We show that lower order m-CAP can offer the same system performance as higher order systems while offering much lower computational complexity. By optimizing the filter parameters and the order m of an m-CAP VLC link, we achieve the largest improvement in the data rate and bandwidth efficiency of 9.69% and 40.43%, respectively, when compared with 2-and 8-CAP. We also show that the m-CAP VLC link with m = 6 can be designed with the same filter parameters to demonstrate a link with both the highest data rate and spectral efficiency simultaneously in contrast to lower order systems.
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