Millimeter-Wave Propagation Characteristics and Localized Rain Effects in a Small-Scale University Campus Network in Tokyo

Regular Section

Hung V. LE, Hasan Md. MOHIBUL, Takuichi HIRANO, Toru TANIGUCHI, Akira YAMAGUCHI, Jiro HIROKAWA, Makoto ANDO

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Keywords: millimeter-wave, rain attenuation, localized rain, spatial variability of rainfall, diversity

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2014 Volume E97.B Issue 5 Pages 1012-1021

DOI https://doi.org/10.1587/transcom.E97.B.1012

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Abstract

The millimeter-wave band suffers strong attenuation due to rain. While calculating the link budget for a wireless system using this frequency band, the behavior of rain, attenuation due to rain, and the amount of degradation must be accurately understood. This paper presents an evaluation of the influence of rain and its attenuation on link performance in a Tokyo Institute of Technology (Tokyo Tech) millimeter-wave model mesh network. Conventional statistical analyses including cumulative rain rate distribution and specific rain attenuation constants are performed on data collected from 2009 onwards. The unique effects arising due to the highly localized behaviors of strong rainfalls have become clear and are characterized in terms of variograms rather than correlation coefficients. Spatial separation even in the small network here with links of less than 1 km provides effective diversity branches for better availability performance.

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