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LED兼具照明和数据通信功能,在室内可见光通信(VLC)中,LED的布局对维持接收面上接收功率的稳定分布有重要作用。室内LED矩形布局下的接收功率分布并不能覆盖整个接收面,存在接收功率中断区,无法实现最优的VLC系统性能。考虑室内墙面及地板的一次反射,研究LED在不同位置的布局方案,采用粒子群优化(PSO)算法分析LED布局方案,设计了能耗最小的LED圆形布局方案。仿真分析了LED矩形布局和圆形布局下的接收功率分布、信号中断率、能量损耗以及信噪比分布,仿真结果表明LED圆形布局的VLC系统性能优于矩形布局,需要的LED数量几乎为矩形布局的一半,减小了VLC系统的码间干扰。
The LED has both lighting and data communication functions. In indoor VLC, the layout of the LEDs plays an important role in maintaining a stable distribution of received power on the receiving surface. Indoor LED rectangular layout of the receiving power distribution and can not cover the entire receiving surface, there is a receiving power interrupt area, can not achieve optimal VLC system performance. Considering the primary reflection of indoor wall and floor, the layout scheme of LED in different positions is studied. The LED layout scheme is analyzed by Particle Swarm Optimization (PSO) algorithm and the LED circular layout scheme with the lowest energy consumption is designed. Simulation analysis of the LED rectangular layout and the circular layout of the received power distribution, signal interruption rate, energy loss and signal to noise ratio distribution, the simulation results show that the LED circular layout of the VLC system performance is better than the rectangular layout, the number of LED is almost Half of the rectangular layout reduces intersymbol interference in the VLC system.