室内可见光通信系统的光源布局优化及性能分析
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摘要
在基于白光发光二极管(LED)的室内可见光通信系统中,考虑墙面的一次反射,研究了不同LED拓扑方式下的布局方案。通过调整拓扑分布提出了方阵+圆环布局模型,该模型可以降低系统的功耗,在满足室内照明的要求下,通过功率分配实现了照度和接收面信噪比的动态范围压缩。仿真分析了基于功率分配的方阵+圆环布局模型的照度分布、接收功率分布、信噪比分布及误码率性能,仿真结果表明:方阵+圆环布局所用光源数虽然比传统方阵布局减少了48个,但性能仍得到了改善。给出了室内可见光通信链路系统带宽、误码率、距离与信噪比的关系,可为用户搭建VLC链路提供参考。
In the indoor visible light communication(VLC) system based on white light-emitting diode(LED), considering the primary reflection of the wall, the layout schemes of different LED topology are studied. By adjusting the topological distribution, the square array combined with the circular ring layout model is proposed to reduce the power consumption of system, and the dynamic range compressions of illuminance and signal-to-noise ratio(SNR) of the receiving plane are realized by power distribution under the indoor lighting requirements. The illuminance distribution, received power distribution, SNR distribution and bit error rate(BER) performance of the square array combined with the circular ring layout model based on power distribution are simulated and analyzed. The simulation results show that the number of light sources used in the square array combined with the ring layout is reduced by 48 compared with the traditional square array layout, but the performance is still improved. At the same time, the relationships between bandwidth, BER, distance and SNR of indoor VLC link system are given, which can provide reference for users to build VLC links.
In the indoor visible light communication(VLC) system based on white light-emitting diode(LED), considering the primary reflection of the wall, the layout schemes of different LED topology are studied. By adjusting the topological distribution, the square array combined with the circular ring layout model is proposed to reduce the power consumption of system, and the dynamic range compressions of illuminance and signal-to-noise ratio(SNR) of the receiving plane are realized by power distribution under the indoor lighting requirements. The illuminance distribution, received power distribution, SNR distribution and bit error rate(BER) performance of the square array combined with the circular ring layout model based on power distribution are simulated and analyzed. The simulation results show that the number of light sources used in the square array combined with the ring layout is reduced by 48 compared with the traditional square array layout, but the performance is still improved. At the same time, the relationships between bandwidth, BER, distance and SNR of indoor VLC link system are given, which can provide reference for users to build VLC links.
引文
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[17] Zhao L,Peng K.Optimization of light source layout in indoor visible light communication based on white light-emitting diode[J].Acta Optica Sinica,2017,37(7):0706001.赵黎,彭恺.基于白光发光二极管的室内可见光通信光源布局优化[J].光学学报,2017,37(7):0706001.
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[19] Cho K,Yoon D.On the general BER expression of one- and two-dimensional amplitude modulations[J].IEEE Transactions on Communications,2002,50(7):1074-1080.
[20] Jia K J,Jin B,Hao L,et al.Performance analysis of DCO-OFDM and ACO-OFDM systems in indoor visible light communications[J].Chinese Journal of Lasers,2017,44(8):0806003.贾科军,靳斌,郝莉,等.室内可见光通信中DCO-OFDM和ACO-OFDM系统性能分析[J].中国激光,2017,44(8):0806003.
[2] Afgani M Z,Haas H,Elgala H,et al.Visible light communication using OFDM[C].International Conference on Testbeds & Research Infrastructures for the Development of Networks & Communities,2006:129-134.
[3] Grubor J,Randel S,Langer K D,et al.Broadband information broadcasting using LED-based interior lighting[J].Journal of Lightwave Technology,2008,26(24):3883-3892.
[4] Chi N,Lu X Y,Wang C,et al.High-speed visible light communication based on LED[J].Chinese Journal of Lasers,2017,44(3):0300001.迟楠,卢星宇,王灿,等.基于LED的高速可见光通信[J].中国激光,2017,44(3):0300001.
[5] Zeng L B,O′Brien D,Le-Minh H,et al.Improvement of date rate by using equalization in an indoor visible light communication system[C].IEEE International Conference on Circuits and Systems for Communications,2008:678-682.
[6] Elgala H,Mesleh R,Haas H,et al.OFDM visible light wireless communication based on white LEDs[C].IEEE Vehicular Technology Conference,2007:2185-2189.
[7] Langer K D,Vu.Exploring the potentials of optical-wireless communication using white LEDs[C].International Conference on Transparent Optical Networks,2011:1-5.
[8] Cossu G,Wajahat A,Corsini R,et al.5.6 Gbit/s downlink and 1.5 Gbit/s uplink optical wireless transmission at indoor distances (≥1.5 m)[C].European Conference on Optical Communication,2014:1-3.
[9] Wang Y G,Tao L,Huang X X,et al.8-Gb/s RGBY LED-based WDM VLC system employing high-order CAP modulation and hybrid post equalizer[J].IEEE Photonics Journal,2015,7(6):1-7.
[10] Li H L,Zhang Y N,Chen X B,et al.682 Mbit/s phosphorescent white LED visible light communications utilizing analog equalized 16QAM-OFDM modulation without blue filter[J].Optics Communications,2015,354:107-111.
[11] Kottke C,Habel K,Grobe L,et al.Single-channel wireless transmission at 806 Mbit/s using a white-light LED and a PIN-based receiver[C].International Conference on Transparent Optical Networks,2012:1-4.
[12] Komine T,Nakagawa M.Fundamental analysis for visible-light communication system using LED lights[J].IEEE Transactions on Consumer Electronics,2004,50(1):100-107.
[13] Sivabalan A,John J.Improved power distribution in diffuse indoor optical wireless systems employing multiple transmitter configurations[J].Optical and Quantum Electronics,2006,38(8):711-725.
[14] Wang Z X,Yu C Y,Zhong W D,et al.Performance of a novel LED lamp arrangement to reduce SNR fluctuation for multi-user visible light communication systems[J].Optics Express,2012,20(4):4564-4573.
[15] Shen Z M,Lan T,Wang Y,et al.Simulation and analysis for indoor visible-light communication based on LED[J].Infrared and Laser Engineering,2015,44(8):2496-2500.沈振民,蓝天,王云,等.基于LED灯的室内可见光通信系统仿真分析[J].红外与激光工程,2015,44(8):2496-2500.
[16] Wang J A,Che Y,Lü C,et al.LED layout for indoor visible light communication based on energy optimization[J].Acta Optica Sinica,2017,37(8):0806003.王加安,车英,吕超,等.基于能量最优的室内可见光通信LED布局[J].光学学报,2017,37(8):0806003.
[17] Zhao L,Peng K.Optimization of light source layout in indoor visible light communication based on white light-emitting diode[J].Acta Optica Sinica,2017,37(7):0706001.赵黎,彭恺.基于白光发光二极管的室内可见光通信光源布局优化[J].光学学报,2017,37(7):0706001.
[18] Yuan Q,Zhan Q X.CIE standard lighting-lighting indoor workplaces[J].China Illuminating Engineering,2002,13(4):55-60.袁樵,詹庆旋.国际照明委员会照明标准:室内工作场所照明[J].照明工程学报,2002,13(4):55-60.
[19] Cho K,Yoon D.On the general BER expression of one- and two-dimensional amplitude modulations[J].IEEE Transactions on Communications,2002,50(7):1074-1080.
[20] Jia K J,Jin B,Hao L,et al.Performance analysis of DCO-OFDM and ACO-OFDM systems in indoor visible light communications[J].Chinese Journal of Lasers,2017,44(8):0806003.贾科军,靳斌,郝莉,等.室内可见光通信中DCO-OFDM和ACO-OFDM系统性能分析[J].中国激光,2017,44(8):0806003.