원문정보
초록
영어
With the recent development of the 4th Industrial Revolution, efforts have been made to carry out communication in a smart factory, farm, etc. at low cost and reliably. Methods for utilizing empty frequencies using TVWS(TV White Space) have been studied which can be used locally within 30 km. However, there have not been many studies on Path-Loss model considering Korean environment. In this paper, the Path-Loss model is divided into LOS (Line Of Sight) and NLOS (None LOS). In case of LOS model, we checked the difference between Free space model, Friis model, 2-ray model and Hata model with measured data. In the case of NLOS model, we checked the difference between Lee Model, ITU-R526-3 Model with measured data. In order to overcome the difference in Korean environment, we derived a model that can be applied in LOS and NLOS and prove its usefulness through performance evaluation through simulation.
목차
1. Introduction
2. Line of Sight Models
2.1 Free Space Model
2.2 Friis Model
2.3 2-ray Model
2.4 Hata Model
2.5 Proposed Model
3. None Line of Sight Models
3.1 Lee Model
3.2 ITU-R 526-3 Model
3.3 Proposed Model
4. Simulation of Proposed Model
4.1 Line of Sight Models
4.2 None Line of Sight Models
5. Conclusion
References