arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2002.03774eess.SPcs.LGstat.ML
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基于机器学习的车载可见光通信信道建模

Machine Learning Based Channel Modeling for Vehicular Visible Light Communication

Koc University(科奇大学)

Bugra Turan, Sinem Coleri

摘要:

光无线通信(OWC)传播信道特性对车载可见光通信(VVLC)系统的设计和性能分析具有重要意义。目前的OWC信道模型基于确定性和随机性方法,未能解决流动性引起的环境光,光学湍流和道路反射对信道特性的影响。因此,替代机器学习(ML)的计划,考虑环境光,光学湍流,道路反射的影响,除了车间距和几何形状,提出了获得准确的VVLC信道损耗和信道频率响应(CFR)。本文通过多层感知器前馈神经网络(MLP)、径向基函数神经网络(RBF-NN)和随机森林集成学习算法,实现了基于ML的VVLC信道模型框架的综合。预测和响应变量,通过实际道路测量收集,训练和验证各种条件下提出的模型。此外,不同的预测变量的信道损耗和CFR的重要性进行了评估,介绍了测量VVLC信道的特征的归一化重要性。我们发现,RBF-NN,随机森林和MLP为基础的模型产生更准确的信道损耗估计与3.53 dB,3.81 dB,3.95 dB均方根误差(RMSE),分别相比,拟合曲线为基础的VVLC信道模型与7 dB RMSE。此外,RBF-NN和MLP模型被证明预测VVLC CFR相对于距离,环境光和接收器倾斜角预测变量分别为3.78 dB和3.60 dB的RMSE。

英文摘要:

Optical Wireless Communication (OWC) propagation channel characterization plays a key role on the design and performance analysis of Vehicular Visible Light Communication (VVLC) systems. Current OWC channel models based on deterministic and stochastic methods, fail to address mobility induced ambient light, optical turbulence and road reflection effects on channel characterization. Therefore, alternative machine learning (ML) based schemes, considering ambient light, optical turbulence, road reflection effects in addition to intervehicular distance and geometry, are proposed to obtain accurate VVLC channel loss and channel frequency response (CFR). This work demonstrates synthesis of ML based VVLC channel model frameworks through multi layer perceptron feed-forward neural network (MLP), radial basis function neural network (RBF-NN) and Random Forest ensemble learning algorithms. Predictor and response variables, collected through practical road measurements, are employed to train and validate proposed models for various conditions. Additionally, the importance of different predictor variables on channel loss and CFR is assessed, normalized importance of features for measured VVLC channel is introduced. We show that RBF-NN, Random Forest and MLP based models yield more accurate channel loss estimations with 3.53 dB, 3.81 dB, 3.95 dB root mean square error (RMSE), respectively, when compared to fitting curve based VVLC channel model with 7 dB RMSE. Moreover, RBF-NN and MLP models are demonstrated to predict VVLC CFR with respect to distance, ambient light and receiver inclination angle predictor variables with 3.78 dB and 3.60 dB RMSE respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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