本文为美国南乔治亚大学（作者：Imtiaz Nasim）的硕士论文，共60页。

越来越多的人关注频率高于6GHz的通信，这引起了国际社会的注意，表明在它成功部署之前还需要更多的研究。这种背景下，在本论文的第一部分，我们研究了第五代（5G）下行链路通信在室内和室外环境中的人体电磁场（EMF）暴露，并考虑到5G可能采用的特性，将其与现有蜂窝技术进行了比较。

第二部分重点介绍了采用两种不同方法缓解室内外环境中的人体暴露。我们的模拟结果表明，虽然5G通信的影响跨越了监管边界，使得基站（BS）和用户设备（UE）之间的间隔非常短，但与现有系统相比，整个网络的电磁暴露水平仍然很高。这项工作还强调了在测量下行链路的电磁暴露符合性时应考虑SAR的重要性。 

Increasing concerns of communications at a frequency spectrum higher than 6 GHz have gained international alarm that suggests more research is needed before it is deployed successfully. In this context, in the first part of this thesis, we investigated the human electromagnetic field (EMF) exposure in indoor and outdoor environments from fifth-generation (5G) downlink communications and compared its impacts with the present cellular technologies considering the features that the 5G will likely adopt. The second part focuses on mitigation of human exposure for both indoor and outdoor environments with two different methods adopted. Our simulation results suggest that while the impacts from 5G communications cross the regulatory borders for a very short separation distance between base stations (BSs) and user equipment (UE), the exposure level remains high throughout the network compared to the present systems. This work also highlights the significance of considering SAR for the measurement of exposure compliance in downlinks.

1.       引言

2. 文献回顾

3. 系统模型

4. 性能分析

5. 提出的协议

6. 数值分析

7. 结论

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