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首页> 外文会议>International Wireless Communications and Mobile Computing Conference >3-Gb/s Visible Light Communication over 5 m Distance Based on Imaging System with Low Transmission Power and Off-the-Shelf LEDs
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3-Gb/s Visible Light Communication over 5 m Distance Based on Imaging System with Low Transmission Power and Off-the-Shelf LEDs

机译：基于具有低传输功率和现成LED的成像系统，3 GB / S可见光通信超过5米距离

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摘要

We demonstrate indoor parallel visible light communication (VLC) achieving 3 Gb/s date rate under distance 5 meters with transmission power 15.9 mW, 189.1 mW and 63.4 mW for red, green and blue LEDs, respectively. The original bandwidths for the adopted LEDs are approximately 10 MHz. A lens is employed at the transmitter side to concentrate the light. Due to the 5-meter distance, different single-color LEDs exhibit separated light spots at the receiver side, which creates parallel transmission paths with negligible inter-color interference. Analogue pre-equalization is adopted to extend the 3-dB bandwidth to approximately 300 MHz, and Volterra series-based digital post-equalizer is adopted to mitigate the nonlinearity and residue inter-symbol interference. In the experiments, on-off keying modulation is adopted due to low reception power at 5-meter distance, and the symbol rate of 1 G per second is adopted for each single-color LED. It is demonstrated that inter-color signal-interference ratio is above 20 dB, and the residue bit error rates of 1.82 × 10−4, 1.4 ×10−3and 1.3 × 10−3 are achieved by red, green and blue LEDs, respectively, all below threshold 3.8 × 10−3 for standard forward error correcting code with 7% redundancy.
机译：我们展示室内平行可见光通信（VLC）分别实现3 GB / S日期速率，以5.9 MW，189.1 MW和63.4 MW用于红色，绿色和蓝色LED。采用LED的原始带宽约为10 MHz。在发射器侧采用透镜以集中光。由于5米的距离，不同的单色LED在接收器侧面上具有分离的光点，这产生了具有可忽略的彩色干扰的平行传输路径。采用模拟预均衡来扩展3 dB带宽至约300 MHz，采用Volterra系列的数字后均衡器来减轻非线性和残留符号间干扰。在实验中，由于5米距离处的低接收功率采用开关键控调制，为每种单色LED采用每秒1g的符号速率。据证明，彩色信号干扰比率高于20dB，残留位误差率为1.82×10 -4 ，1.4×10 -3 1.3×10 -3 通过红色，绿色和蓝色LED实现，所有以下阈值为3.8×10 -3 对于标准前向纠错纠正码7％的冗余。

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