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학술지 Influence Analysis of Typical Objects in Rural Railway Environments at 28 GHz
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Danping He, Bo Ai, Mathis Schmieder, Zhangdui Zhong, 김준형, 회빙, 정희상, 김일규, Yang Hao
IEEE Transactions on Vehicular Technology, v.68 no.3, pp.2066-2076
17HF1900, 평창 동계올림픽 5G 통신서비스 지원을 위한 차세대 통신네트워크 기술개발, 정현규
Millimeter wave (mmWave) is a key to realize high data-rate communication and enable smart railway services. There are more and more research work focusing on the algorithm and system design for railway communications in the mmWave band. A correct understanding of the mmWave channel characteristics for railway scenario is important for the estimation and evaluation of designed technologies. In this paper, the influence of typical objects in rural railway environment to the mmWave propagation channel is analyzed. Based on the channel measurement conducted at 28 GHz with train-to-infrastructure deployment in the rural railway environment, a ray tracing (RT) simulator is calibrated in terms of environment modeling and electromagnetic (EM) calculation. The dominant multipath components of the measurement are tracked and matched with corresponding objects in the propagation environment. Accordingly, dominant propagation mechanisms (direct, penetration, reflection, scattering, etc.) are determined, the three-dimensional environment model and the EM parameters of different objects are calibrated. To overcome the constraints of the measurement and analyze the influence more practically, the measurement campaign is extended to four different environment cases and four T2I deployments. With the predetermined dominant propagation mechanisms and calibrated EM parameters, reliable RT simulations are conducted. The influence of typical objects are analyzed for the considered environment cases and deployments. The analysis of this paper not only helps to understand the important influential factors of propagation channel at the object level, but also can be useful in guiding deployment of mmWave communication system. The provided EM parameters and environment modeling suggestions will enable reliable RT based channel realization in rural railway environments.
KSP 제안 키워드
28 GHz, Channel Characteristics, Channel measurement, Communication system, High data rate, Influential factor, Infrastructure deployment, Measurement Campaign, MmWave channel, Propagation Channel, Propagation mechanisms