摘要
A large amount of mobile data from growing high-speed train(HST)users makes intelligent HST communications enter the era of big data.The corresponding artificial intelligence(AI)based HST channel modeling becomes a trend.This paper provides AI based channel characteristic prediction and scenario classification model for millimeter wave(mmWave)HST communications.Firstly,the ray tracing method verified by measurement data is applied to reconstruct four representative HST scenarios.By setting the positions of transmitter(Tx),receiver(Rx),and other parameters,the multi-scenarios wireless channel big data is acquired.Then,based on the obtained channel database,radial basis function neural network(RBF-NN)and back propagation neural network(BP-NN)are trained for channel characteristic prediction and scenario classification.Finally,the channel characteristic prediction and scenario classification capabilities of the network are evaluated by calculating the root mean square error(RMSE).The results show that RBF-NN can generally achieve better performance than BP-NN,and is more applicable to prediction of HST scenarios.
基金
supported by the National Key R&D Program of China under Grant 2021YFB1407001
the National Natural Science Foundation of China (NSFC) under Grants 62001269 and 61960206006
the State Key Laboratory of Rail Traffic Control and Safety (under Grants RCS2022K009)
Beijing Jiaotong University, the Future Plan Program for Young Scholars of Shandong University
the EU H2020 RISE TESTBED2 project under Grant 872172
