研究目的
Optimizing transmit beamforming for a visible light communication multiuser system to maximize the achievable sum rate.
研究成果
The proposed optimal beamforming method achieves a higher sum rate than conventional zero-forcing based schemes, especially for low transmit optical powers or high channel correlations. Simulations validate the effectiveness of the proposed approach.
研究不足
The study focuses on a specific scenario of VLC multiuser systems and may not account for all possible variations in real-world applications. The iterative algorithm converges to a locally optimal solution, which may not be the global optimum.
1：Experimental Design and Method Selection:
The study employs an iterative algorithm that exploits sequential parametric convex approximation to address the non-convex problem of rate maximization.
2：Sample Selection and Data Sources:
The study focuses on a typical VLC scenario where K user terminals communicate with L LED transmitters simultaneously.
3：List of Experimental Equipment and Materials:
The system parameters include LED transmitters, user terminals, and optical channels modeled by the classical line-of-sight (LOS) model.
4：Experimental Procedures and Operational Workflow:
The procedure involves deriving a closed-form sum rate expression, formulating the rate maximization problem, and developing an iterative algorithm for solution.
5：Data Analysis Methods:
The performance of the proposed method is compared with existing zero-forcing beamforming strategies through simulations.
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