An Enhanced Bit Loading Scheme with Pairwise Coding for Low-pass VLC Systems

被引：0

作者：

Zhang, Yize ^{[1
]}

Liu, Xiaoqian ^{[1
]}

Chen, Jiaqi ^{[1
]}

Yang, Fan ^{[1
]}

Dong, Yuhan ^{[1
,2
]}

机构：

[1] Tsinghua Univ, Shenzhen Int Grad Sch, Shenzhen, Peoples R China

[2] Peng Cheng Lab, Shenzhen, Peoples R China

来源：

ICC 2023-IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS | 2023年

关键词：

Visible light communication; orthogonal frequency division multiplexing; bit loading; pairwise coding;

D O I：

10.1109/ICC45041.2023.10279453

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

We consider DC-biased optical orthogonal frequency division multiplexing (DCO-OFDM) low-pass visible light communication (VLC) systems in which water-filling and uniform power loading strategies have almost the same rate performance. However, conventional bit loading based on either water-filling or uniform power loading cannot reach the maximum achievable rate because the number of bits loaded per subcarrier can only be integers. In this paper, we apply pairwise coding (PWC) to solve this problem by performing joint coding on pairs of subcarriers to balance their symbol error rate (SER) performance. We present a closed-form expression for the optimal parameter of PWC and an approximation of its theoretical performance, and propose an enhanced bit loading scheme with PWC to improve the system rate. Numerical results suggest that the enhanced scheme has a significant rate improvement and approaches the maximum achievable rate for moderate to high signal-to-noise ratio (SNR).

引用

页码：3308 / 3313

页数：6

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