HTML5 Webook

25/182

cal layer specications for radiocommunication devices. e authors constructed a propagation measurement sys-tem to address these objectives.e propagation measurements were conducted in the urban environment of Yokosuka city (Kanagawa prefec-ture). Figures 4 and 5 illustrate the xed and mobile station, respectively. e mobile station ran along the solid lines shown in Fig.6 (both stations were in line-of-sight while it ran along the red line, and non-line-of-sight along the blue lines). Figures 7 and 8 show propagation loss against transmission distance: the former plots line-of-sight envi-ronment data, and the latter non-line-of-sight. To obtain insight for the development of a propagation loss model applicable for each frequency, least-square regression lines were calculated (overlaid in the gures).dB][log100100ddnLPL(1)FiF7　Path loss measurement results in LoS urban environment(Copyright(C)2017 IEICE, [3] Fig. 10)22.12.22.32.4100110120130140log10 dPath loss (dB) 32.3 GHz 40.25 GHz 44.45 GHz 46.25 GHz 48.5 GHzFiF6　Measurement route of MS(Copyright(C)2017 IEICE, [3] Fig. 9)BSLoSNLoSFiF8　Path loss measurement results in NLoS urban environment(Copyright(C)2017 IEICE, [3] Fig. 10)22.12.22.32.4100110120130140150160log10 dPath loss (dB) 32.3 GHz 40.25 GHz 44.45 GHz 46.25 GHz 48.5 GHzFiF4　TX base station(a) View of building　(b) TX antenna(Copyright(C)2017 IEICE, [3] Fig.4)TX ANTBS(a)(b)FiF5　RX mobile station(a) RX antenna　(b) Mobile measurement car(Copyright(C)2017 IEICE, [3] Fig. 8)MSRX ANT(a)(b)212-3 Study on Propagation Model for Advanced Utilization of Millimeter- and Terahertz-Waves