復(fù)雜隧道環(huán)境毫米波傳播特性仿真與實(shí)測(cè)
[Abstract]:In recent years, with the increasing demand of communication quality, the research of the fifth generation wireless communication system has made rapid progress. The millimeter wave propagation characteristic has become one of the research hotspots in the field of wireless communication. As an important activity place in modern society, the study of millimeter wave propagation characteristics in tunnel has important practical value and theoretical significance. In this paper, the propagation characteristics of millimeter wave in tunnel environment are studied by the method of incident and rebound ray / mirror, and the actual measurement and simulation analysis of millimeter wave wireless channel are carried out. It provides theoretical basis and scientific support for the network planning and optimization of millimeter wave communication in the next generation tunnel environment. The main contents of this paper are as follows: (1) the research status of millimeter wave is summarized, the basic concept of incident and rebound ray / image method and the algorithm of computer implementation are introduced. The hardware system and measurement steps used in the field measurement are described in detail. (2) the correctness of this method is verified: modeling and simulation are carried out in the typical rectangular long air tunnel environment. The simulation results are compared with those measured in the known literature. On this basis, the propagation of millimeter wave in tunnel environment with different roughness is compared. At the same time, the actual measurement and simulation modeling are carried out in the case of straight line of sight and bending non-line-of-sight in complex tunnel environment. The simulation results are compared with the measured results. (3) considering the diversity of simulation conditions, the effects of different curvature radii on millimeter wave propagation in curved tunnel are discussed. The difference between vertical and horizontal polarization in curved tunnel is compared. The received power and root mean square delay (RMS) of vertical polarization wave in different cases are compared by simulation. The propagation characteristics of three different curvature radius tunnels are analyzed and compared. (4) considering the complexity of simulation environment, the propagation characteristics of millimeter wave in complex vehicle tunnel environment are simulated. The effects of different numbers of vehicles and vehicles in different positions on millimeter wave propagation, as well as on the received power and Doppler frequency shift, are analyzed.
【學(xué)位授予單位】:南京郵電大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TN928
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