A Gb/s VLC Transmission Using Hardware Preequalization Circuit
A Gb/s VLC Transmission Using Hardware Preequalization Circuit
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DOI：
10.1109/lpt.2015.2445781
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发表时间：
2015-09
影响因子：
2.6
通讯作者：
Xingxing Huang;Jianyang Shi;Jiehui Li;Yiguang Wang;N. Chi
中科院分区：
文献类型：
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作者：
Xingxing Huang;Jianyang Shi;Jiehui Li;Yiguang Wang;N. Chi
在这封信中，我们提出了一种用于高速可见光通信（VLC）系统的恒阻对称桥式t振幅均衡器。使用硬件均衡器，我们成功地演示了基于RGB LED在80厘米自由空间上每秒千兆比特的VLC传输。在1.05 Gb/s的64二次调幅（64QAM）单载波调制、1.05 Gb/s的64QAM正交频分复用（OFDM）和1.42 Gb/s的位负载和功率负载OFDM调制中，信号的测量误码率（ber）低于7%的预前向纠错（pre-FEC）限制（3.8 × 10-3），清楚地验证了所提出均衡器的可行性。与不使用均衡器的系统相比，VLC系统的误码率性能至少提高了一个数量级。此外，均衡器体积小巧，只需使用无源元件即可轻松安装，因此可以轻松集成到放大器或LED中。据我们所知，它是使用预均衡电路的最高数据速率和最长传输距离。
In this letter, we proposed a constant-resistance symmetrical bridged-T amplitude equalizer for high-speed visible light communication (VLC) system. Using the hardware equalizer, we successfully demonstrated a gigabit per second VLC transmission over 80-cm free space based on a RGB LED. The measured bit error rates (BERs) for the signals in 64-quadratic-amplitude modulation (64QAM) single carrier modulation at 1.05-Gb/s, 64QAM-orthogonal frequency division multiplexing (OFDM) at 1.05 Gb/s, and bit and power loading OFDM modulation at 1.42 Gb/s, are under 7% pre-forward error correction (pre-FEC) limit of 3.8 × 10-3, clearly validating the feasibility of the proposed equalizer. Compared with the system without using the equalizer, the BER performance of the VLC systems can be improved at least by 1 order of magnitude. Moreover, the equalizer can be easily integrated into amplifier or LED because of its compact size and easy installation for just using passive component. To the best of our knowledge, it is the highest data rate with longest transmission distance using preequalization circuit.