CMOS-integrated GaN LED array for discrete power level stepping in visible light communications.
CMOS-integrated GaN LED array for discrete power level stepping in visible light communications.
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DOI：
10.1364/oe.25.00a338
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发表时间：
2017-03
期刊：
影响因子：
3.8
通讯作者：
A. Griffiths;M. S. Islim;J. Herrnsdorf;J. McKendry;R. Henderson;H. Haas;E. Gu;M. Dawson
中科院分区：
文献类型：
--
作者：
A. Griffiths;M. S. Islim;J. Herrnsdorf;J. McKendry;R. Henderson;H. Haas;E. Gu;M. Dawson
我们报道了一种能够产生离散光输出功率电平的CMOS集成微型LED阵列。通过并行逻辑信号控制可单独寻址的16×16像素阵列的通断。通过精心选择的LED组一起驱动，可以产生适合离散传输方案的信号。评估了器件的线性度，并使用脉冲幅度调制(PAM)和正交频分复用(OFDM)进行了数据传输。用4-PAM实现了符号速率为100MSamples/S的无差错传输，得到了200Mb/S的数据速率。对于8-PAM，需要编码以克服接收端的基线漂移，使数据速率降低到150Mb/S。我们还给出了离散电平OFDM码的实验概念验证，获得了3.96bit/S/Hz的频谱效率。
We report a CMOS integrated micro-LED array capable of generating discrete optical output power levels. A 16 × 16 array of individually addressable pixels are on-off controlled through parallel logic signals. With carefully selected groups of LEDs driven together, signals suitable for discrete transmission schemes are produced. The linearity of the device is assessed, and data transmission using pulse amplitude modulation (PAM) and orthogonal frequency division multiplexing (OFDM) is performed. Error-free transmission at a symbol rate of 100 MSamples/s is demonstrated with 4-PAM, yielding a data rate of 200 Mb/s. For 8-PAM, encoding is required to overcome the baseline wander from the receiver, reducing the data rate to 150 Mb/s. We also present an experimental proof-of-concept demonstration of discrete-level OFDM, achieving a spectral efficiency of 3.96 bits/s/Hz.