Compensation of a VLC Phosphorescent White LED Nonlinearity by Means of Volterra DFE
Compensation of a VLC Phosphorescent White LED Nonlinearity by Means of Volterra DFE
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DOI：
10.1109/lpt.2013.2272511
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发表时间：
2013-08-15
影响因子：
2.6
通讯作者：
Zwierko, Piotr
中科院分区：
文献类型：
--
作者：
Stepniak, Grzegorz;Siuzdak, Jerzy;Zwierko, Piotr
在这封信中，分析了可见光通信链路，采用白色磷光发光二极管（LED）作为发射机和p-i-n光电二极管结合光学滤波器作为接收机。四电平和八电平脉冲幅度调制用于数据传输。该链路不仅受到类似于LED的20 MHz的相当小的带宽的限制，而且当调制指数超过类似于60%时，其非线性也成为问题。它示出的接收器与判决反馈均衡器（DFE）与非线性沃尔泰拉前馈部分高达二阶可以有效地补偿的非线性的影响的发射LED和执行高达5 dB的光功率比使用标准的DFE。
In this letter, a visible light communication link is analyzed that employs a white phosphorescent light emitting diode (LED) as transmitter and a p-i-n photodiode combined with optical filter as receiver. Four-and eight-level pulse amplitude modulation is used for data transmission. The link is not only limited by a rather small bandwidth of similar to 20 MHz of the LED, but also its nonlinearity becomes a problem when the modulation index exceeds similar to 60%. It is shown that a receiver with a decision feedback equalizer (DFE) with nonlinear Volterra feed-forward section up to the second order can efficiently compensate effects of nonlinearity of the transmitting LED and performs up to 5 dB better in terms of optical power than using a standard DFE.