论文标题
DCO-OFDM的光谱和能源效率在可见光通信系统中具有有限的字母输入
Spectral and Energy Efficiency of DCO-OFDM in Visible Light Communication Systems with Finite-Alphabet Inputs
论文作者
论文摘要
可见光光通信（DCO-OFDM）的信息传输速率尚不清楚，可见光通信（VLC）尚不清楚，其中相应的光谱效率（SE）和能源效率（EE）源于开放研究问题。在本文中，我们首次将{} dco-ofdm系统的确切速率得出了可实现的速率。此外，我们研究了{} DCO-OFDM系统的最大化问题，均受到电力和光功率约束。通过利用相互信息与最小于点误差之间的关系，我们提出了一个多级汞水分填充功率分配方案，以实现最大的SE。此外，研究了{} DCO-OFDM系统的EE最大化问题，并为最大EE开发了Dinkelbach型功率分配方案。数值结果验证了提出的理论和权力分配方案的有效性。
The bound of the information transmission rate of direct current biased optical orthogonal frequency division multiplexing (DCO-OFDM) for visible light communication (VLC) with finite-alphabet inputs is yet unknown, where the corresponding spectral efficiency (SE) and energy efficiency (EE) stems out as the open research problems. In this paper, we derive the exact achievable rate of {the} DCO-OFDM system with finite-alphabet inputs for the first time. Furthermore, we investigate SE maximization problems of {the} DCO-OFDM system subject to both electrical and optical power constraints. By exploiting the relationship between the mutual information and the minimum mean-squared error, we propose a multi-level mercury-water-filling power allocation scheme to achieve the maximum SE. Moreover, the EE maximization problems of {the} DCO-OFDM system are studied, and the Dinkelbach-type power allocation scheme is developed for the maximum EE. Numerical results verify the effectiveness of the proposed theories and power allocation schemes.
