A HIGH-PERFORMANCE BLUE FILTER FOR A WHITE-LED-BASED VISIBLE LIGHT COMMUNICATION SYSTEM
A HIGH-PERFORMANCE BLUE FILTER FOR A WHITE-LED-BASED VISIBLE LIGHT COMMUNICATION SYSTEM
复制标题
用于基于白光 LED 的可见光通信系统的高性能蓝色滤光片
DOI：
10.1109/mwc.2015.7096286
复制
发表时间：
2015-04-01
影响因子：
12.9
通讯作者：
Lu, Wei
中科院分区：
文献类型：
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作者：
Wang, Shao-Wei;Chen, Feiliang;Lu, Wei
在基于白光LED的VLC系统中，采用了一种高性能的蓝光滤波器来提高调制带宽和显著降低误码率。它具有很宽的阻带(500-1050 nm)，高透过率通带(在430-485 nm的蓝信号范围内平均为97.5%)，以及清晰而精确的截止边缘。蓝色滤光片不仅可以完全去除调制信号中的慢磷光分量，还可以有效地抑制周围的太阳辐射。同时，LED的蓝光信号几乎可以保留。这导致了高信噪比并改善了VLC系统的性能，包括增加了调制带宽和降低了误码率。与不带蓝光滤光片的VLC系统相比，在50 MHz带宽下，误码率从3.6×10-2降至1.7×10-4，在30 cm距离时，误码率从2.6×10-2降至1.9×10-5。更重要的是，阻带覆盖了接收器的整个响应范围，除了蓝色信号频段，这大大提高了VLC系统在阳光下或户外使用的能力。
A high-performance blue filter was demonstrated and employed to increase the modulation bandwidth and dramatically reduce the bit error rate of a white-LED-based VLC system. It has a very wide stopband (500-1050 nm), high transmittance passband (average 97.5 percent in the blue signal range of 430-485 nm), and a sharp and precise cutoff edge. Not only can the blue filter completely remove the slow phosphorescent component from modulated signals, but it can also effectively reject ambient solar radiation. Meanwhile, the blue light signals of the LED can almost be retained. This results in a high SNR and improves the performance of a VLC system, including increased modulation bandwidth and reduced BER. The BER can be dramatically reduced from 3.6 × 10-2 to 1.7 × 10-4 at 50 MHz bandwidth, and from 2.6 × 10-2 to 1.9 × 10-5 at a distance of 30 cm compared to a VLC system without our blue filter. More importantly, the stop band covers the whole response range of the receiver except for the blue signal band, which strongly increases the ability of a VLC system used in the sun or outdoors.