Estimation of Received Signal Power 5G-Railway Communication Systems Selvi Lukman, Yul Yunazwin Nazaruddin, Bo Ai*, Ruisi He, Endra Joelianto
Bandung Institute of Technology Jalan Ganesha 10, Bandung 40132, Indonesia State Key Laboratory of Rail Traffic,Control and Safety Beijing Jiaotong University
Abstract
This paper presents the estimation of received power signal based on the Support Vector Regression (SVR). The simulated datasets are used, which contain the positions of transmitter (Tx) and receiver (Rx) , the distance between the TX and RX, and the corresponding path loss, and the carrier frequencies. SVR presents the accuracy estimation of simulated datasets computing which shows Mean Square Error (MSE) as the average value of estimation errors that are squared, Root Mean Square Error (RMSE) as another parameter for measuring the accuracy of a estimation as a root value of MSE Average Root also R² as the coefficient of determination tool for measuring how far the ability of the model in explaining some variations in the dependent variable. If the value of R² approaches one, it means that predictive results can follow variable patterns or variations well dependent. Cross Validation is a performance measurement .The aim is to find the best hyper-parameter combination so that machine learning can predict data accurately and prevent over-fitting problems. Optimal parameter values are determined by using the Grid Search Method, where machine learning will do modeling using the range C ɤ and ɛ given. Therefore, SVR Hyper-Parameter shows the most optimized parameter with C which affects the penalty given when there is an error in classification , Gamma that affects the pace of learning process, Epsilon indicates the error limit than can be ignored. The parameter values that produce the highest accuracy or the smallest error will be chosen as the best parameter.
Keywords: Estimation Machine Learning, Path Loss, Received Power Signal, SVR, 5G-R
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