Modeling of millimeter-wave wireless radiochannel taking into account the effects of reflection and scattering

DOI: 10.31673/2412-4338.2020.011560

Abstract

Prediction of the trajectory and energy characteristics of the channels of direct visibility and in the absence of direct visibility is necessary for the implementation of telecommunication systems in the millimeter wavelength range. For forecasting, methods based on the propagation of millimeter waves in the environment were analyzed. A method is developed based on a quasi-optical propagation model taking into account the effects of multiple reflections and multipath signal propagation. Since due to the short wavelength of the MMD, narrowly directed radiation can be realized, it is possible to provide simultaneous image formation, communication, and positioning. The possibility of amplifying the radio channel in the millimeter range using artificial reflectors for the formation of a single narrow beam, which is repeatedly reflected from several reflectors, as well as multipath signal propagation for one reflection, is considered. The above calculation results show that the modeling (as well as the implementation) of radio channels using artificial reflectors can lead to signal amplification in the channel, increase accessibility, and communication range. Based on the exact geometry of the building or the external environment inside the premises, energy and spectrally effective solutions can be found, which is especially important when designing telecommunication networks in the millimeter range, and in the future terahertz range, and especially when applying MIMO technology. Studying the fundamental effects of reflection, scattering, and diffraction for millimeter waves can lead to the development of more accurate models of energy coverage, calculations of signal delay, coherence, polarization, noise, etc. Such approaches are necessary for the development of future ultra-fast mobile telecommunication systems with various applications and services.

Keywords: telecommunication systems, millimeter waves, 5G, channel modeling, signal propagation, direct visibility, reflection, scattering, artificial reflectors, channel amplification, channel prediction.

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