BICM-ID scheme for clipped DCO-OFDM in visible light communications

Visible light communication (VLC) is recommended for indoor transmissions in 5G network, whereby DC-biased optical orthogonal frequency division multiplexing (DCO-OFDM) is adopted to eliminate the inter-symbol interference (ISI) but suffers from considerable performance loss induced by clipping dist...

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Bibliographic Details
Published inOptics express Vol. 24; no. 5; pp. 4573 - 4581
Main Authors Tan, Jiandong, Wang, Zhaocheng, Wang, Qi, Dai, Linglong
Format Journal Article
LanguageEnglish
Published United States 07.03.2016
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Summary:Visible light communication (VLC) is recommended for indoor transmissions in 5G network, whereby DC-biased optical orthogonal frequency division multiplexing (DCO-OFDM) is adopted to eliminate the inter-symbol interference (ISI) but suffers from considerable performance loss induced by clipping distortion. In this paper, bit-interleaved coded modulation with iterative demapping and decoding (BICM-ID) scheme for clipped DCO-OFDM is investigated to enhance the performance of VLC systems. In order to further mitigate the clipping distortions, a novel soft demapping criterion is proposed, and a simplified demapping algorithm is developed to reduce the complexity of the proposed criterion. Simulation results illustrate that the enhanced demapping algorithm achieves a significant performance gain.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.24.004573