基于位置和功率协同优化的煤矿工作面可见光通信光源分布
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摘要
分析了煤矿工作面可见光通信系统模型,设计了两种工作面通信空间发光二极管(LED)光源分布优化方法,可分别实现每个LED光源在空间顶部的二维位置的优化,以及每个LED光源二维位置及其功率分配权值的协同优化。应用烟花算法,设置接收平面的信噪比(SNR)因子作为群体优化算法的目标函数,并作为衡量接收平面信号均匀性的指标。研究结果表明,两种优化方法得到的接收平面信号SNR因子比等功率均匀阵列光源分布的SNR因子分别降低了16.6%和24.6%,明显改善了接收信号SNR波动,提高了信号均匀性,保证了不同用户之间的同等通信质量。
The system model of visible light communication in coal mine working face is analyzed. Two optimization methods of LED light source distribution in coal mine working face are designed. One is be used to optimize the two-dimensional position of each LED light source on the top of working space, and the other is used to co-optimize the two-dimensional position and its power weight of each LED light source. The fireworks algorithm is adopted and the signal-to-noise ratio(SNR) factor of the receiving plane is set as the target function of the group optimization algorithm as well as the indicator for evaluating the uniformity of signals in the receiving plane. The research results show that after optimization with these two methods, the SNR factors of signals in the receiving plane are reduced by 16.6% and 24.6%, respectively, compared with that under the uniform array distribution of LED light sources with equal powers. The SNR fluctuation is significantly improved, the optical signal uniformity is also improved, and thus the same communication quality among different users is ensured.
The system model of visible light communication in coal mine working face is analyzed. Two optimization methods of LED light source distribution in coal mine working face are designed. One is be used to optimize the two-dimensional position of each LED light source on the top of working space, and the other is used to co-optimize the two-dimensional position and its power weight of each LED light source. The fireworks algorithm is adopted and the signal-to-noise ratio(SNR) factor of the receiving plane is set as the target function of the group optimization algorithm as well as the indicator for evaluating the uniformity of signals in the receiving plane. The research results show that after optimization with these two methods, the SNR factors of signals in the receiving plane are reduced by 16.6% and 24.6%, respectively, compared with that under the uniform array distribution of LED light sources with equal powers. The SNR fluctuation is significantly improved, the optical signal uniformity is also improved, and thus the same communication quality among different users is ensured.
引文
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[4] Wang Z X,Yu C Y,Zhong W D,et al.Performance improvement by tilting receiver plane in M-QAM OFDM visible light communications[J].Optics Express,2011,19(14):13418-13427.
[5] Zhao Z X,Song X Q,Jia S J,et al.Optimization layout of lighting for VLC system in special vehicle[J].Infrared and Laser Engineering,2017,46(1):0122001.赵梓旭,宋小庆,贾胜杰,等.特种车内可见光通信系统光源布局优化[J].红外与激光工程,2017,46(1):0122001.
[6] Ding J P,Huang Z T,Ji Y F.Evolutionary algorithm based power coverage optimization for visible light communications[J].IEEE Communications Letters,2012,16(4):439-441.
[7] Zhao L,Peng K,Jiao X L.Design of the layout of lighting for indoor VLC system[J].Infrared and Laser Engineering,2017,46(11):1122001.赵黎,彭恺,焦晓露.室内VLC系统光源布局设计[J].红外与激光工程,2017,46(11):1122001.
[8] Chen Y,Shen Q X,Liu H L.Optimization algorithm of receiver optical power uniformity in indoor visible light communication[J].Chinese Journal of Lasers,2018,45(5):0506003.陈勇,沈奇翔,刘焕淋.室内可见光通信中接收光功率均匀性优化方法[J].中国激光,2018,45(5):0506003.
[9] 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.
[10] Pei Y,Zheng S Q,Tan Y,et al.Effectiveness of approximation strategy in surrogate-assisted fireworks algorithm[J].International Journal of Machine Learning and Cybernetics,2015,6(5):795-810.
[11] Tan Y.Editorial:special issue on advances in swarm intelligence for neural networks[J].Neurocomputing,2015,148:1-2.
[12] Li J Z,Zheng S Q,Tan Y.The effect of information utilization:introducing a novel guiding spark in the fireworks algorithm[J].IEEE Transactions on Evolutionary Computation,2017,21(1):153-166.
[13] You C X,Zhang S,Zhai Y R,et al.A new optimization method of light source for visual light communication in mine working face[J].Journal of China University of Mining & Technology,2014,43(2):333-338.游春霞,张申,翟彦蓉,等.煤矿工作面可见光通信光源优化设计新方法[J].中国矿业大学学报,2014,43(2):333-338.
[14] You C X,Zhang S,Zhang R,et al.Light source altitude optimization in coalface visible light communications based on the fireworks algorithm[J].Journal of China University of Mining & Technology,2017,46(5):1174-1180.游春霞,张申,张然,等.基于烟花算法的煤矿工作面VLC光源高度优化[J].中国矿业大学学报,2017,46(5):1174-1180.
[15] You C X,Zhang S,Zhang R.An optimal LED light source arrangement to reduce SNR fluctuation for MISO VLC system using fireworks algorithm[J].International Journal of Grid and Distributed Computing,2016,9(12):295-306.