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Expanded Multiband Super-Nyquist CAP Modulation for Highly Bandlimited Organic Visible Light Communications | IEEE Journals & Magazine | IEEE Xplore

Expanded Multiband Super-Nyquist CAP Modulation for Highly Bandlimited Organic Visible Light Communications


Abstract:

In this article, we experimentally demonstrate a novel expanded nonorthogonal multiband super-Nyquist carrier-less amplitude and phase (m-ESCAP) modulation for bandlimite...Show More

Abstract:

In this article, we experimentally demonstrate a novel expanded nonorthogonal multiband super-Nyquist carrier-less amplitude and phase (m-ESCAP) modulation for bandlimited organic visible light communication (VLC) systems. The proposed scheme has the same bandwidth requirement as the conventional m-CAP while breaking the orthogonality between subcarriers by purposely overlapping them. We compare m-ESCAP with the conventional m-CAP and a compressed nonorthogonal version of m-CAP (m-SCAP) in terms of measured bit error rate (BER) performance, bit rates, and spectral efficiencies. We show that the m-ESCAP system offers improvement in the bit rate of ~10% and 20% compared to the m-CAP and m-SCAP, respectively, and in the spectral efficiency of ~20% compared to m-CAP. These gains are achieved at the cost of increased BER, which, however, remains below the 7% forward error correction limit.
Published in: IEEE Systems Journal ( Volume: 14, Issue: 2, June 2020)
Page(s): 2544 - 2550
Date of Publication: 19 September 2019

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