Visible light communication (VLC), which utilizes the ubiquitous illumination network to implement high-speed communication, is rapidly emerging as one promising candidate to complement conventional radio frequency communication. In practical VLC systems, the illumination network is required to be human-centric to provide adjustable lighting for different user requirements, which limits the resource utilization of the communication aspect. Dimming control techniques, which provide compromise resource management solutions between illumination and communication, are critically essential in the implementation and commercialization of VLC. In this article, state-of-the-art dimming techniques for VLC are illustrated from a multi-dimensional perspective, including the intensity domain, the time domain, the frequency domain, and the spatial domain. We provide a comprehensive comparison of these techniques on their principles, key features, system performance, and so on. In addition, the challenges and the future research trends are presented to provide researchers with insights of future improvements and prospect of advancement in the field. Moreover, the concept of the software defined multi-dimensional dimming is also proposed for the human-centric illumination network by utilizing multi-dimensional resources according to the diversified system requirements.

中文翻译：

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用于以人为中心的照明网络的可见光通信的调光技术：最新技术，挑战和趋势

利用无处不在的照明网络来实现高速通信的可见光通信（VLC）迅速崛起，成为补充常规射频通信的一种有希望的候选者。在实际的VLC系统中，照明网络需要以人为中心，以便为不同的用户需求提供可调的照明，这限制了通信方面的资源利用率。调光控制技术在照明和通信之间提供折衷的资源管理解决方案，对于VLC的实现和商业化至关重要。本文从多维角度说明了VLC的最新调光技术，包括强度域，时域，频域和空间域。我们对这些技术的原理，关键功能，系统性能等进行了全面的比较。此外，提出了挑战和未来的研究趋势，以为研究人员提供有关该领域未来改进和发展前景的见识。此外，还根据多样化的系统需求，通过利用多维资源，为以人为本的照明网络提出了软件定义的多维调光的概念。