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학술지 NLOS Path Loss Model for Low-Height Antenna Links in High-Rise Urban Street Grid Environments
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이주열, 김명돈, 정현규, 김진업
International Journal of Antennas and Propagation, v.2015, pp.1-10
Hindawi Publishing
14ZI1100, 트래픽 용량 증대를 위한 액세스 네트워크 원천기술 연구, 김진업
This paper presents a NLOS (non-line-of-sight) path loss model for low-height antenna links in rectangular street grids to account for typical D2D (device-to-device) communication link situations in high-rise urban outdoor environments. From wideband propagation channel measurements collected in Seoul City at 3.7 GHz, we observed distinctive power delay profile behaviors between 1-Turn and 2-Turn NLOS links: the 2-Turn NLOS has a wider delay spread. This can be explained by employing the idea that the 2-Turn NLOS has multiple propagation paths along the various street roads from TX to RX, whereas the 1-Turn NLOS has a single dominant propagation path from TX to RX. Considering this, we develop a path loss model encompassing 1-Turn and 2-Turn NLOS links with separate scattering and diffraction parameters for the first and the second corners, based on the Uniform Geometrical Theory of Diffraction. In addition, we consider the effect of building heights on path loss by incorporating an adjustable "waveguide effect" parameter; that is, higher building alleys provide better propagation environments. When compared with field measurements, the predictions are in agreement.
KSP 제안 키워드
Channel measurement, Communication link, Delay spread, Device to Device(D2D), Field measurement, High-rise, Line-Of-Sight(LOS), Non Line-of-sight(NLOS), Outdoor environments, Power delay(PD), Power delay profile(PDP)