目录.........................................................1.....................................................2..................................................4......................................4............................5................................6....................................8........................8..................................8..........................9.............................10...................................10.............................................12...............................13.............................13.....................14.................17.................19.............................................20...................................21.........................................21.............................................22......................22.....................23...................................25.............................................28...........................................30.............................................30.............................................30....................................................32摘要在科学技术飞速发展的现代，人们对于室内定位的需求不断提高。而传统的无线通信和定位设备在微波受限环境中使用受到限制。作为一种新兴的照明方式，发光二极管（LightEmittingDiode，LED）在实现照明的同时，可同时提供通信和定位功能。本文主要研究了一种能在满足室内照明要求的条件下，利用照明用的LED同时实现通信和定位功能的融合系统。针对传统的室内可见光三边定位算法存在的缺点，本文实现了一种基于距离加权的室内可见光定位算法以及一种基于差分修正的室内可见光定位算法，同时搭建了实验系统，对算法进行了验证。基于距离加权的室内可见光定位算法，其原理是通过引入与估计距离相关的加权因子，对定位坐标进行调整。该算法可以在满足室内照明需要的LED分布情况下，实现传统三边定位算法所能实现的最佳定位效果，大大提高了传统三边定位算法的普适性。基于差分修正的改进算法有别于传统的三边定位算法，是通过将参考的节点到接收机的测量距离与实际距离相减得到差分修正值，并按比例对LED到接收机的距离进行差分修正的。经仿真和实验验证，该算法能够较好地抑制接收端RSS的随机波动，提高定位系统的精确度。本文在空间大小为80cm*80cm*80cm的黑箱中进行定位算法的实验测试，LED在黑箱顶部分布，坐标为（20,20），（60,20），（60,60），（20,60）。实验的测试结果显示传统三边定位算法的最大误差为3.24cm，加权算法的最大误差为3.16cm，差分算法的最大误差为2.50cm，与理论相符。关键词：LED可见光定位距离加权差分修正ABSTRACTWiththerapiddevelopmentofscienceandtechnology,thedemandforindoorpositioningisconstantlyimproving.Thetraditionalwirelesscommunicationandpositioningequipmentarelimitedintheuseofmicrowavelimitedenvironment.Asanewlightingmode,theapplicationofLightEmittingDiode(LED)incommunicationandlightingcaneffectivelyimprovethissituation.ThispapermainlystudiesakindoffusionsystemthatcanrealizecommunicationandlocationfunctionbyusingtheLEDoflightingwhenmeetingtherequirementsofindoorlighting.Inviewoftheshortcomingsofthetraditionalthreeedgepositioningalgorithmforindoorvisiblelight,anindoorvisiblelightlocationalgorithmbasedondistanceweightingandanindoorvisiblelightlocationalgorithmbasedondifferentialcorrectionareimplemented,andanexperimentalsystemisbuilt,andthealgorithmisverified.Inthispaper,animprovedalgorithmbasedondistanceweightingisintroduced,andthepositioningcoordinatesareadjustedbyintroducingaweightedfactorassociatedwiththeestimateddistance.Thealgorithmcana...
