Rate Splitting Multiple Access-Aided MISO Visible Light Communications

Shuai Ma, Guanjie Zhang, Zhi Zhang, Rongyan Gu, Youlong Wu, Shiyin Li
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Abstract

In this paper, we focus on the optimal beamformer design for rate splitting multiple access (RSMA)-aided multiple-input single-output (MISO) visible light communication (VLC) networks. First, we derive the closed-form lower bounds of the achievable rate of each user, which are the first theoretical bound of achievable rate for RSMA-aided VLC networks. Second, we investigate the optimal beamformer design for RSMA-aided VLC networks to maximize the sum rate under the optical and electrical power constraints. Since this optimal problem is non-convex, a concave-convex procedure (CCCP)-based iterative algorithm is proposed to approximate the non-convex term by the convex lower bound at each iteration. Thus, the optimal beamformer design problem can be solved iteratively until convergence, and a high-quality suboptimal solution can be obtained. In addition, we show that the proposed algorithms of RSMA-aided networks can achieve superior performance compared with space-division multiple access (SDMA) and non-orthogonal multiple access (NOMA).
分频多址辅助MISO可见光通信
本文重点研究了分频多址(RSMA)辅助多输入单输出(MISO)可见光通信(VLC)网络的最佳波束形成器设计。首先,我们推导了每个用户可达速率的封闭下界,这是rsma辅助VLC网络可达速率的第一个理论界。其次,我们研究了rsma辅助VLC网络的最佳波束形成器设计,以在光和电功率约束下最大化和速率。由于该最优问题是非凸的,提出了一种基于凹凸过程(CCCP)的迭代算法,通过每次迭代的凸下界逼近非凸项。这样就可以迭代求解最优波束形成器设计问题,直到收敛,得到一个高质量的次优解。此外,我们还表明,与空分多址(SDMA)和非正交多址(NOMA)相比,所提出的rsma辅助网络算法可以获得更好的性能。
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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