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

被引：10
|
作者：
Tan, Jiandong [1 ]
Wang, Zhaocheng [1 ]
Wang, Qi [1 ]
Dai, Linglong [1 ]
机构：
[1] Tsinghua Univ, Dept Elect Engn, TNList, Beijing 100084, Peoples R China
来源：
OPTICS EXPRESS | 2016年 / 24卷 / 05期
基金：
中国国家自然科学基金;
关键词：
WIRELESS; REDUCTION;
D O I：
10.1364/OE.24.004573
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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. (C) 2016 Optical Society of America
引用
收藏
页码：4573 / 4581
页数：9
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