1-Gb/s Transmission Over a Phosphorescent White LED by Using Rate-Adaptive Discrete Multitone Modulation
1-Gb/s Transmission Over a Phosphorescent White LED by Using Rate-Adaptive Discrete Multitone Modulation
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DOI：
10.1109/jphot.2012.2210397
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发表时间：
2012-10-01
影响因子：
2.4
通讯作者：
Ciaramella, E.
中科院分区：
文献类型：
--
作者：
Khalid, A. M.;Cossu, G.;Ciaramella, E.
发光二极管（LED）将越来越多地用于照明技术，也将允许宽带光无线信号的分配。使用白色LED的可见光通信（VLC）提供优于基于RF的无线系统的若干优点，即，免许可频谱、低功耗和更高的隐私性。大多数情况下，光无线可以提供更高的数据速率。在本文中，我们展示了一个VLC系统的基础上，一个白色LED的室内宽带无线接入。在研究了LED和功率放大器的非线性效应后，通过使用优化的离散多音调制技术和自适应比特和功率加载算法，在标准照度水平下实现了1 Gb/s的数据速率。接收数据的误码率为1.5.10（-3），这在普通前向纠错（FEC）编码的极限内。这些结果是以前获得的最高容量的两倍。
Light-emitting diodes (LEDs), which will be increasingly used in lighting technology, will also allow for distribution of broadband optical wireless signals. Visible-light communication (VLC) using white LEDs offers several advantages over the RF-based wireless systems, i.e., license-free spectrum, low power consumption, and higher privacy. Mostly, optical wireless can provide much higher data rates. In this paper, we demonstrate a VLC system based on a white LED for indoor broadband wireless access. After investigating the nonlinear effects of the LED and the power amplifier, a data rate of 1 Gb/s has been achieved at the standard illuminance level, by using an optimized discrete multitone modulation technique and adaptive bit-and power-loading algorithms. The bit-error ratio of the received data was 1.5.10(-3), which is within the limit of common forward error correction (FEC) coding. These results twice the highest capacity that had been previously obtained.