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Currently, the next generation (5G) mobile communication system has been actively investigated all over the world, in order to satisfy the future expected requirements, such as super high bit rate. Here, one of the approaches is to utilize the high-SHF (over 6 GHz) and EHF (mainly 30 – 100 GHz) bands. Here, in order to determine the carrier frequency bands for 5G, frequency dependency of path loss...
The user traffic volume in the cellular network has been growing rapidly. Recent capacity enhancement techniques based on the small-cell architecture are examined for crowded areas such as urban railway stations and environs. Although small-cell propagation environments are characterized by short distances and low antenna heights, the applicability of current MIMO channel models in those environments...
Recently, the challenges of the utilization of higher frequency bands for cellular systems have been attracting attention. In these high frequency bands, besides the higher propagation losses, the propagation channel tends to suffer more severe shadowing by pedestrians in the environments. In this paper, we carried out measurements in the 26GHz band in an indoor quasi-static environment for figuring...
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