This paper applies a deep learning approach to model the mechanism of path loss based on profile in urban propagation environments for 5G cellular communication systems. The proposed method combines log-distance line-of-sight scenarios and deep-learning-based non-line-of-sight cases. Simulation results show that outperforms conventional models when operating 3.5 GHz frequency band. standard dev...

We consider a method for developing radio-wave propagation prediction model in mountainous forested area. A new path loss development approach uses free-space (FSPL) and an empirical model. To improve the accuracy, transmission distance, free space area, forest area were calculated separately. obtained distance areas from digital surface (DSM), which represents elevation information, including ...

This paper presents new empirical prediction models for loss estimation in forest environment. Experimental investigations were carried out on groups of trees form woodland and lines at SHF band under different operational contexts. In the experimentations, two major measurement geometries (propagation “into” propagation “inside” forest) adopted site to basis. Results from all sites displayed a...

This paper proposes a path loss prediction model based on convolutional neural network utilizing side-view images to consider over-rooftop propagation, in addition the top-view around receiving station of conventional urban macrocell environment. The building profile between transmitting and stations was used for images. In addition, scalar parameter frequency added fully connected part as prop...

In this study, we present a measurement-based model for path loss prediction in three GSM service areas at 900 MHz . Modified Hata model for rural, suburban, and urban environments were derived in this study on the basis of experimental path loss measurements with the use of least square method. The models developed predicted with reasonable accuracy the path loss of radio networks investigated...

In this paper, radio wave propagation over irregular terrain is investigated in 200–600MHz (VHF/UHF band). Measured results are compared with different path loss models such as Fresnel knife edge diffraction and uniform theory of diffraction (UTD). It is shown that, for low antenna heights, using a combination of the two-ray path loss model and knife-edge diffraction, great improvement in path ...