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Achievable data rate of coordinated multi-point transmission for visible light communications

机译:可见光通信中可协调的多点传输的可达到数据速率

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This paper studies the sum data rate that a Visible Light Communication (VLC) system with multiple users can achieve when phosphor-converted white LED panels are used to provide illumination and communication simultaneously. Three different transmission schemes based on Asymmetrically Clipped Optical Orthogonal Frequency Division Multiplexing (ACO-OFDM) are considered to allocate the communication resources in each transmission point: Frequency Reuse (FR), Joint Transmission Coordinated Multi-Point (JT-CoMP), and a Hybrid combination of them. Since phosphor-converted white LEDs have a larger modulation bandwidth for blue optical wavelengths rather than green-yellow-red ones, the performance of each transmission method is also evaluated using a visible and/or blue light optical filter in front of the Photodetector (PD). When the transmission points apply FR, strong inter-cell interference results in high variability of the achievable data rate at different locations. On the other hand, when JT-CoMP is applied, a more homogeneous data rate coverage is achieved, reducing the peak data rate in the inner parts of the cells but improving notably the data rate in cell-edge areas.
机译:本文研究了使用荧光粉转换的白色LED面板同时提供照明和通信时,具有多个用户的可见光通信(VLC)系统可以实现的总数据速率。考虑了基于非对称限幅光正交频分复用(ACO-OFDM)的三种不同的传输方案来分配每个传输点中的通信资源:频率重用(FR),联合传输协调多点(JT-CoMP)和一个它们的混合组合。由于荧光粉转换后的白光LED相对于蓝光波长具有更大的调制带宽,而不是绿黄红光波长,因此还可以使用光电检测器(PD)前面的可见光和/或蓝光滤光片来评估每种传输方法的性能。 )。当传输点应用FR时,强烈的小区间干扰会导致不同位置处可达到的数据速率高度可变。另一方面,当应用JT-CoMP时,可以实现更均匀的数据速率覆盖,从而降低了单元内部的峰值数据速率,但显着提高了单元边缘区域的数据速率。

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