Spectrally enhanced PAM-DMT for IM/DD optical wireless communications

2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC) Pub Date : 2015-12-03 DOI:10.1109/PIMRC.2015.7343421

M. S. Islim, D. Tsonev, H. Haas

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引用次数: 24

Abstract

For the same spectral efficiency, pulse-amplitude-modulated discrete multitone modulation (PAM-DMT) has a lower power efficiency in comparison with direct current (DC)-biased optical orthogonal frequency division multiplexing (DCO-OFDM). A power efficient spectrally enhanced PAM-DMT (ePAM-DMT) is proposed in this paper. Superposition modulation of multiple PAM-DMT streams is used to improve the spectral efficiency of PAM-DMT. The ePAM-DMT allows the spectral efficiency gap between DCO-OFDM and other unipolar OFDM schemes to be completely closed. The proposed system is compared with DCO-OFDM in the context of an additive white Gaussian noise (AWGN) channel. A closed-form theoretical bound on the bit error rate (BER) performance of the proposed scheme is derived and verified by Monte Carlo simulations. The proposed scheme is energy efficient in terms of the electrical power consumption. The high optical energy dissipation of the proposed scheme makes it suitable for the illumination-based visible light communications (VLC) applications.

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用于IM/DD光无线通信的频谱增强PAM-DMT

在相同的频谱效率下，与直流偏置光正交频分复用(DCO-OFDM)相比，脉冲幅度调制离散多音调制(PAM-DMT)的功率效率较低。本文提出了一种功率高效的频谱增强PAM-DMT (ePAM-DMT)。为了提高PAM-DMT的频谱效率，采用了多个PAM-DMT流的叠加调制。ePAM-DMT允许DCO-OFDM和其他单极OFDM方案之间的频谱效率差距完全关闭。将该系统与加性高斯白噪声(AWGN)信道下的DCO-OFDM进行了比较。推导了该方案误码率性能的封闭理论边界，并通过蒙特卡罗仿真进行了验证。就耗电量而言，建议的方案是节约能源的。该方案具有高光能量耗散的特点，适合于基于照度的可见光通信应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)

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