论文标题
基于SCMA的可见光通信的低复杂码本设计
Low-Complexity Codebook Design for SCMA based Visible Light Communication
论文作者
论文摘要
稀疏代码多重访问（SCMA）作为代码域的非正交多访问（NOMA）方案，已在未来的无线通信系统中获得大规模连通性的研究关注。在本文中，我们为基于SCMA的可见光通信（VLC）系统提出了一个新颖的代码书（CB）设计，该系统受到射击噪声的影响。特别是，我们引入了一种迭代算法，用于通过考虑射击噪声对VLC接收器的影响来设计和优化CB。根据提出的CB，我们得出并分析了所得SCMA-VLC系统的理论位错误率（BER）表达。模拟结果表明，我们提出的CBS在现有文献中的表现优于CBS，对于不同的负载因子而言，复杂性要小得多。此外，派生的分析BER表达很好地与模拟结果保持一致，尤其是在高信号功率区域中。
Sparse code multiple access (SCMA), as a code-domain non-orthogonal multiple access (NOMA) scheme, has received considerable research attention for enabling massive connectivity in future wireless communication systems. In this paper, we present a novel codebook (CB) design for SCMA based visible light communication (VLC) system, which suffers from shot noise. In particular, we introduce an iterative algorithm for designing and optimizing CB by considering the impact of shot noise at the VLC receiver. Based on the proposed CB, we derive and analyze the theoretical bit error rate (BER) expression for the resultant SCMA-VLC system. The simulation results show that our proposed CBs outperform CBs in the existing literature for different loading factors with much less complexity. Further, the derived analytical BER expression well aligns with simulated results, especially in high signal power regions.
