Ray-Tracing Based Millimeter-Wave Channel Characteristics in Subway Carriage

Yao, Zhiyi; Xiong, Lei; Miao, Haiyang

doi:10.1109/iccc49849.2020.9238950

Cited by 1 publication

(1 citation statement)

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“…In addition to the above propagation models for offices, classrooms and outdoor environments where wireless communication systems have been mainly used, propagation characteristics in new environments where millimeter waves are expected to be used have been reported [22]- [27]. In [22]- [24], channel characteristics were investigated at high-speed railway stations in the 28 GHz or 39 GHz band based on ray tracing simulations. On the other hand, further verification is needed to clarify the applicability in real environments, because these reports were based on simulation results by ray tracing.…”

Section: Introductionmentioning

confidence: 99%

Measurement and Evaluation of 28 GHz Propagation Characteristics in Specific Environments

Ito

Hayashi

2022

IEEE Access

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New specific scenarios are expected for 5G systems in various environments, such as stadiums, subway platforms, factories, livestock barns. On the other hand, the applicability of conventional propagation models to new specific environments has not been clarified. In this paper, we report path loss and spatiotemporal characteristics such as delay spread (DS) and azimuth and zenith angular spread of arrival (ASA and ZSA) in the 28 GHz-band in various environments. By comparing the degree of fit to the conventional models, we considered whether the models for conventional scenarios assumed by previous mobile systems can be applied to the propagation characteristics in each specific environment. As a result, we clarify that the following points should be considered when applying the conventional model. The measured path loss characteristics were mostly close to those of the conventional models. However, the path loss in the non-line-of-sight with propagation to another room was larger than the conventional model, assuming there was a hall space environment with some blockers. Regarding the DS, we obtained the results that the characteristics were mainly affected by existence of long-distance delayed wave caused by a long narrow space and materials of the internal walls and ceiling. Larger ASA characteristics were obtained in the subway platform environment and the factory environment because of metallic obstacles and walls. Regarding the ZSA, a larger ZSA was obtained in the stadium due to scattering from spectator seats, and a smaller ZSA was obtained in the subway platform due to the low ceiling height and long propagation distance.INDEX TERMS 5G mobile communication system, millimeter-wave band, radio wave propagation, path loss, delay spread, angular spread.

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