針對可見光通信系統(tǒng)存在的光照度和接收平面功率分配不均勻的問題,提出了基于多種群遺傳算法的光源布局模型。以15個LED燈為例,構造和接收功率方差有關的適應度函數(shù),采用多個種群協(xié)同進化的方式,對LED燈的位置坐標信息進行尋優(yōu)。經(jīng)Matlab R2016a仿真結果表明,優(yōu)化后的功率分布直觀上更均勻,功率方差達到1.5744 dBm,照度范圍為889 lx～1009 lx,照度均勻度亦達到91.73%,均優(yōu)于傳統(tǒng)遺傳算法優(yōu)化的布局和多種群遺傳算法優(yōu)化的矩形布局,從而為系統(tǒng)優(yōu)化LED燈布局使得用戶獲得更好的通信體驗提供了一種借鑒方案。 

【文章來源】：光電工程. 2020,47(07)北大核心CSCD

【文章頁數(shù)】：8 頁

【部分圖文】：

MPGA優(yōu)化參數(shù)分Fig.4Distributionsofparametersunderthepropos10-1Width/m-202Length/m

蟛季值惱斬確段?為889lx~1009lx，區(qū)間長度最小，均勻性達到91.73%，優(yōu)于GA優(yōu)化布局和MPGA優(yōu)化矩形布局下的結果，驗證了所提方法的可行性。圖4MPGA優(yōu)化參數(shù)分布圖。(a)照度；(b)功率Fig.4DistributionsofparametersundertheproposedlayoutoptimizedbyMPGA.(a)Illuminance;(b)Power850950900100010-1Width/m-202Length/mIluminance/lx(a)(b)-1.610-1Width/m-202Length/m-1.4-1.2Power/dBm-1.8圖5GA優(yōu)化參數(shù)分布圖。(a)照度；(b)功率Fig.5DistributionsofparametersundertheproposedlayoutoptimizedbyGA.(a)Illuminance;(b)Power850950900100010-1Width/m-202Length/mIluminance/lx(a)-1.610-1Width/m-202Length/m-1.4-1.2-1.0Power/dBm(b)

光電工程https://doi.org/10.12086/oee.2020.190565190565-6圖6MPGA優(yōu)化矩形布局參數(shù)分布圖。(a)照度；(b)功率Fig.6DistributionsofparametersunderrectangularlayoutoptimizedbyMPGA.(a)Illuminance;(b)Power900110080010-1Width/m-202Length/mIluminance/lx(a)1000-2.010-1Width/m-202Length/m-1.5-1.0-0.5Power/dBm(b)圖7LED燈布局圖。(a)MPGA優(yōu)化；(b)GA優(yōu)化；(c)矩形布局Fig.7LayoutsofLEDlamps.(a)OptimizedbyMPGA;(b)OpimizedbyGA;(c)Therectangularlayout-2.0-1.001.02.0Length/m-1.5-1.0-0.50.00.51.01.5(c)表3布局參數(shù)表Table3ParametersoflayoutsLayoutMinimumreceivingpower/dBmMaximumreceivingpower/dBmAveragereceivingpower/dBmReceivedpowervariance/dBmIlluminationrange/lxUniformityratioofilluminance/%TheproposedlayoutoptimizedbyMPGA-1.6189-1.0705-1.24581.5744889~100991.73TheproposedlayoutoptimizedbyGA-1.5932-0.9193-1.11832.0802895~104589.60TherectangularlayoutoptimizedbyMPGA-1.7892-0.4947-0.93956.8100855~115282.06-1.5-1.0-0.50.00.51.01.5(a)-2.0-1.001.02.0Length/m-2.0-1.001.02.0Length/m-1.5-1.0-0.50.00.51.01.5(b)Width/mWidth/mWidth/m


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