Path Loss Model with Low Antenna Height for Microwave Bands in Residential Areas

Abstract

SUMMARYA new path loss model of interference between mobile terminals in a residential area is proposed. The model uses invertible formulas and considers the effects on path loss characteristics produced by paths having many corners or corners with various angles. Angular profile and height pattern measurements clarify three paths that are dominant in terms of their effect on the accurate modeling of path loss characteristics in residential areas: paths along a road, paths between houses, and overroof propagation paths. Measurements taken in a residential area to verify the model's validity show that the model is able to predict path loss with greater accuracy than conventional models. key words: path loss model, low antenna height, mobile terminal, residential area, microwave band

NLOS Path Loss Model for Low-Height Antenna Links in High-Rise Urban Street Grid Environments

“…This leads to more interaction with objects in the close neighbor surroundings [3]. Specifically, in high-rise building environments, radiowaves from low-antenna terminals rarely propagate over-rooftop paths via diffraction but do propagate along the street roads [4]. Consequently, propagation between low-antenna terminals in high-rise urban street involves different NLOS (non-line-of-sight) behaviors with "corners" in street grids acting as the shadowing objects for NLOS conditions.…”

“…The path loss model in this paper is developed with a separate scattering/diffraction parameter for 2-Turn NLOS that can capture multiple propagation paths. Sasaki et al [4] also considered a different nature of propagation for a different number of corner turns. However, their model is developed only for residential areas, where the average building height is less than 10 meters.…”

“…In contrast to this, our model is developed for high-rise urban areas, specifically for rectilinear grid environments in Street Canyons, where average building height is far greater than 10 meters and the gap between buildings is narrower. According to the propagation path classification in [4], our model considers only "path along roads" (and not "paths between houses" or "over-roof propagation paths") since the antenna height of transmitters and receivers for D2D communications is much lower than the surrounding building height in highrise urban areas. Consequently, our model is simpler but is quite adequate for predicting propagation behaviors in urban areas.…”

Path Loss Models for Wireless Access Network Systems Using High Frequency Bands

“…The respective losses for these paths are indicated as L r , L b , and L v , as seen in Fig. 2(b) [2]. We modeled these path losses using parameters including the distance along a road between the Tx and the Rx, building density, and building height.…”