面向5G的室外高低频大尺度传播特性测量和信道模型分析

发布时间：2018-05-08 18:33

本文选题：连续波 + 传播模型　；参考：《南京邮电大学》2017年硕士论文

【摘要】：通信系统的传输速率和传输质量受到无线信道的制约,只有充分研究无线信道特性,才能应用合适的物理层技术。而无线通信要解决传输面临的挑战,首先要解决信号覆盖问题。基于下一代无线通信的频谱需求,本文对第四代移动通信候选频段3.5GHz,下一代通信候选频段28GHz和39GHz信道的传播特性做了相关研究,分析结果对SG网络的部署具有重要意义。本文根据已有的窄带和宽带测量方案,针对室外传播模型的研究提出了 CW窄带信道测量方案,设计了一套精度高实用性强的测量系统。对城市郊区的宏窝小区、NLOS场景做了重点研究。以自由空间传播理论为依据,用自由空间参考距离损耗模型(CI损耗模型)和浮动截距损耗模型(FI损耗模型)分析了测量数据。对于CI损耗模型求出了路径损耗指数n,阴影衰落方差σCI。对于FI损耗模型求出了截距α,斜率β和阴影衰落方差σFI。此外将FI损耗模型与3GPP 36.873、38.900损耗模型做对比分析,量化了 3GPP模型与我国特定环境损耗之间的差异。基于所有数据,对于高低频信号传播模型总结如下:(1)随着频率的增大,损耗越来越大。(2)接收机高度在一定范围内增加,可以减小路径损耗。(3)环境对高频信号的影响要远远大于低频。(4) 3GPP的UMaNLOS高频损耗模型已不适用特定环境。
[Abstract]:The transmission rate and quality of the communication system are restricted by the wireless channel. Only by fully studying the characteristics of the wireless channel can the appropriate physical layer technology be applied. In order to solve the challenge of transmission, wireless communication must first solve the problem of signal coverage. Based on the spectrum requirements of the next generation wireless communication, this paper studies the propagation characteristics of 28GHz and 39GHz channels in the fourth generation mobile communication candidate band 3.5 GHz, the next generation mobile communication candidate band 28GHz and the 39GHz channel. The analysis results are of great significance to the deployment of SG network. In this paper, according to the existing narrowband and wideband measurement schemes, a CW narrowband channel measurement scheme is proposed for the study of outdoor propagation model, and a set of measurement system with high accuracy and practicability is designed. The NLOS scene of Hongwo district in the suburb of the city is studied emphatically. Based on the free space propagation theory, the measured data are analyzed by using the free space reference distance loss model (CI loss model) and the floating intercept loss model (FI loss model). For the CI loss model, the path loss exponent n and the variance 蟽 CI of shadow fading are obtained. For fi loss model, intercept 伪, slope 尾 and shaded fading variance 蟽 FI are obtained. In addition, the fi loss model and the 3GPP 36.873 ~ 38.900 loss model are compared and analyzed, and the difference between the 3GPP model and the specific environment loss in China is quantified. Based on all the data, the propagation model of high and low frequency signal is summarized as follows: 1) with the increase of frequency, the loss becomes larger and larger.) the height of receiver increases within a certain range. The influence of environment on high frequency signal is much greater than that on low frequency. 4) the UMaNLOS loss model which can reduce path loss is no longer suitable for special environment.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5

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