Variable m-CAP for bandlimited Visible Light Communications

Chvojka, Petr, Zvanovec, Stanislav, Werfli, Khald, Haigh, Paul and Ghassemlooy, Zabih (2017) Variable m-CAP for bandlimited Visible Light Communications. In: 2017 IEEE International Conference on Communications Workshops (ICC Workshops). IEEE, Piscataway, pp. 1-5. ISBN 978-1-5090-1526-9

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The multi-band carrier-less amplitude and phase (m-CAP) modulation technique has been demonstrated as a significant candidate for use in visible light communication (VLC) systems, as spectral efficiency becomes ever more important. When employing m-CAP modulation, the signal bandwidth is typically split into m equally distributed subcarriers regardless of the -3 dB bandwidth. Thus, in this paper we investigate the impact of splitting the signal bandwidth into unequally spaced subcarriers on the m-CAP VLC system performance. We demonstrate that by allocating different bandwidths for individual subcarriers, we can achieve up to 36% improvement in data rate for 6-CAP (i.e. 6 subcarriers). We show that the higher the order of the variable m-CAP, the more significant improvement in data rate becomes even for a highly bandlimited VLC system when compared to the conventional m-CAP scheme.

Item Type: Book Section
Uncontrolled Keywords: carrier-less amplitude and phase modulation, visible light communications
Subjects: H600 Electronic and Electrical Engineering
P900 Others in Mass Communications and Documentation
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 09 Aug 2017 10:23
Last Modified: 12 Oct 2019 19:21

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