Experimental evaluation on outdoor to indoor propagation characteristics for multiple microwave bands

Abstract

Recently, the next generation (5-th generation: 5G) mobile communication systems have been actively investigated all over the world, in order to satisfy the strong demand for the faster and larger data communication. In 5G systems, not only UHF band but also SHF/EHF bands have been attracted much attention. Hence, frequency characteristics of radio propagation path loss have been studied. We have previously investigated outdoor to indoor (O2I) propagation characteristics in the 2.2 GHz band, and a modified path loss model instead of 3GPP model has been proposed. In this paper, in order to investigate frequency characteristics in terms of O2I propagation, the received power is measured for O2I propagation when considering 0.8, 2.2 and 4.7 GHz bands. Moreover, we investigate O2I propagation characteristics for different frequency bands by using O2I factor which denotes coefficient versus transmit distance with logarithm expression when considering O2I propagation. Moreover, we consider O2I factor which is calculated by the least square approximation.

A simple model of outdoor to indoor penetration path-loss considering incident angles at 0.9, 2.3 and 5.1GHz

“…Previously, O2I penetration path-loss models have been proposed [2] [3]. The fixed value is used in [2].…”

“…The fixed value is used in [2]. In [3], the focus is on the incident angles in the horizontal plane; further, O2I factors, which show the path-loss coefficient, are presented for the 0.8, 2.2, and 4.7 GHz bands. In our previous study, we evaluated the O2I penetration path-loss characteristics at 2 and 5 GHz for different incident angles considering only the vertical plane [4].…”

A study on outdoor to indoor penetration path loss at 2 and 5 GHz

“…Here, we focused on the outdoor to indoor (O2I) propagation path loss, since terminal stations are used both in outdoor and indoor environments, while base stations are installed only in outdoor environments. Other O2I models have been previously proposed in [2,3]. A fixed value was used in [2]; however, the model in [3] considered the incident angles on the horizontal plane and used calculated the O2I factors (path loss coefficients) for frequencies of 0.8, 2.2, and 4.7 GHz.…”

“…Other O2I models have been previously proposed in [2,3]. A fixed value was used in [2]; however, the model in [3] considered the incident angles on the horizontal plane and used calculated the O2I factors (path loss coefficients) for frequencies of 0.8, 2.2, and 4.7 GHz.…”