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传统基于照明的光源布局方式在室内难免会存在光照度不均匀现象,造成通信盲区效应,从而影响通信系统的可靠性。为了解决此问题,以4m×4m×3m房间为模型,在常用的室内光源布局模式下,采用光照度补偿技术,对其进行合理的布局优化,得出了一种由5个发光二极管阵列组成的光源布局方式,这种布局方式可同时降低系统功耗并提高光照度均匀性。为了兼顾可见光通信(VLC)系统的可靠性,采用室内接收平面的光照度标准差与通信中接收平面的平均误码率(BER)构建系统优化模型函数f(L,i),当f(L,i)达到最小值时可同时满足接收平面的照度要求和通信BER要求。仿真结果表明,当L=0.35m、i=0.025m时,f(L,i)取最小值,此时接收平面光照度的最小值为301.26lx,最大值为389.90lx,均匀度为93.24%,系统照度标准差为20.1,功耗为140.5 W,BER为6.39×10-7。所提系统可同时兼顾室内接收平面光照度分布的均匀性和通信的可靠性,为室内VLC光源布局提供了一种优化方法。
The traditional light-based lighting layout inevitably exists in the indoor lighting uneven phenomenon, resulting in blind communication effect, thus affecting the reliability of the communication system. In order to solve this problem, taking the 4m × 4m × 3m room model as an example, the illumination intensity compensation technology is adopted in the commonly used indoor light source layout mode to optimize its layout, and a 5-LED array Light source layout, this layout can reduce system power consumption and improve the illumination uniformity. In order to balance the reliability of visible light communication (VLC) system, the system optimization model function f (L, i) is constructed by using the standard deviation of illumination of indoor receiving plane and the average BER of the receiving plane in communication. When f i) At the minimum, both the illumination requirements of the reception plane and the communication BER requirements can be satisfied at the same time. The simulation results show that f (L, i) takes the minimum value when L = 0.35m and i = 0.025m, and the minimum value of receiving plane illumination is 301.26lx, the maximum value is 389.90lx and the evenness is 93.24% The system illumination standard deviation is 20.1, power consumption is 140.5 W, BER is 6.39 × 10-7. The proposed system can take into account the uniformity of indoor illumination plane illumination and the reliability of communication, providing an optimization method for indoor VLC light source layout.