5G下行链路中人体对射频场的暴露

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摘要翻译：
毫米波(mmW)频段的蜂窝通信一直吸引着人们的研究兴趣，但其对人类健康的潜在有害影响还没有得到充分的研究。在蜂窝通信系统中，由于发射机与人体的物理接触更紧密，所以以往对人体暴露在射频场中的研究主要集中在上行链路。然而，由于蜂窝系统部署在毫米波频段将要求(i)由于小区尺寸较小而部署更多的发射机，以及(ii)使用高度定向天线将射频能量更集中，因此有必要对人类在下行射频场中的暴露进行深入研究。本文研究了第五代无线系统(5G)下行链路的人体射频暴露水平。我们的结果表明，5G下行链路射频场产生的功率密度(PD)和比吸收率(SAR)明显高于当前蜂窝系统。本文还表明，在确定毫米波下行链路的人体射频暴露时，也应考虑SAR。
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英文标题：
《Human Exposure to RF Fields in 5G Downlink》
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作者：
Imtiaz Nasim and Seungmo Kim
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最新提交年份：
2017
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分类信息：

一级分类：Electrical Engineering and Systems Science        电气工程与系统科学
二级分类：Signal Processing        信号处理
分类描述：Theory, algorithms, performance analysis and applications of signal and data analysis, including physical modeling, processing, detection and parameter estimation, learning, mining, retrieval, and information extraction. The term "signal" includes speech, audio, sonar, radar, geophysical, physiological, (bio-) medical, image, video, and multimodal natural and man-made signals, including communication signals and data. Topics of interest include: statistical signal processing, spectral estimation and system identification; filter design, adaptive filtering / stochastic learning; (compressive) sampling, sensing, and transform-domain methods including fast algorithms; signal processing for machine learning and machine learning for signal processing applications; in-network and graph signal processing; convex and nonconvex optimization methods for signal processing applications; radar, sonar, and sensor array beamforming and direction finding; communications signal processing; low power, multi-core and system-on-chip signal processing; sensing, communication, analysis and optimization for cyber-physical systems such as power grids and the Internet of Things.
信号和数据分析的理论、算法、性能分析和应用，包括物理建模、处理、检测和参数估计、学习、挖掘、检索和信息提取。“信号”一词包括语音、音频、声纳、雷达、地球物理、生理、（生物）医学、图像、视频和多模态自然和人为信号，包括通信信号和数据。感兴趣的主题包括：统计信号处理、谱估计和系统辨识；滤波器设计；自适应滤波/随机学习；（压缩）采样、传感和变换域方法，包括快速算法；用于机器学习的信号处理和用于信号处理应用的机器学习；网络与图形信号处理；信号处理中的凸和非凸优化方法；雷达、声纳和传感器阵列波束形成和测向；通信信号处理；低功耗、多核、片上系统信号处理；信息物理系统的传感、通信、分析和优化，如电网和物联网。
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英文摘要：
  While cellular communications in millimeter wave (mmW) bands have been attracting significant research interest, their potential harmful impacts on human health are not as significantly studied. Prior research on human exposure to radio frequency (RF) fields in a cellular communications system has been focused on uplink only due to the closer physical contact of a transmitter to a human body. However, this paper claims the necessity of thorough investigation on human exposure to downlink RF fields, as cellular systems deployed in mmW bands will entail (i) deployment of more transmitters due to smaller cell size and (ii) higher concentration of RF energy using a highly directional antenna. In this paper, we present human RF exposure levels in downlink of a Fifth Generation Wireless Systems (5G). Our results show that 5G downlink RF fields generate significantly higher power density (PD) and specific absorption rate (SAR) than a current cellular system. This paper also shows that SAR should also be taken into account for determining human RF exposure in the mmW downlink.
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PDF链接：
https://arxiv.org/pdf/1711.03683

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关键词：Applications Optimization significant Application performance downlink 射频 研究 得到 人们