Propagation Estimation by Using Building Coverage and Floor Area Ratios Based on 1-Ray Model Combined with Okumura-Hata Mode

This paper is concerned with the numerical simulation of electric field distributions in urban areas by using the 1-ray model combined with 2-ray model. Introducing the amplitude modification factor and the propagation order of distance, the 1-ray model is arranged so that we can approximately but efficiently estimate propagation characteristics in complicated environments. We show that the two parameters and can be determined by comparing the proposed 1-ray model with the Okumura-Hata model which has been widely used to design wireless networks. In this paper, we propose a new method that makes use of building coverage and floor area ratios in a city in order to estimate electric field distributions in complicated propagation environments in addition to the three areas defined by the Okumura-Hata model. Numerical examples are also shown for the distributions of estimated amplitude modification factor and communication distance Dc in Fukuoka.