On the Exposure Dose Minimization of Multi-antenna Multi-carrier System Users

Authors: F. Heliot, T. Brown

Year: 04/27/2022

Category: Wireless Communications

Journal: IEEE Transactions on Vehicular Technology

DOI: 10.1109/TVT.2022.3170606

URL: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9764644&isnumber=4356907

Abstract

Overview

Modern wireless personal devices (WPDs) supporting multi-input multi-output (MIMO) communications pose uncertainties regarding their electromagnetic field (EMF) effects, especially at the system level.

Model and Framework

A generic model is introduced for assessing the EMF exposure dose for users of multi-antenna systems in multi-carrier communication contexts. An optimization framework is subsequently developed to strategically minimize user exposure.

Key Findings

Introduction of a new system-level EMF exposure minimization criterion based on a normalized exposure dose and channel to noise ratio (CNR).
Two novel centralized resource allocation schemes designed to use multiple antennas effectively, reducing exposure by up to 80% compared to existing approaches.
Demonstration of a logarithmic relationship between user exposure dose and the number of receive antennas or time slots, informing further reduction strategies and balanced system efficiency.

Conclusion

The study presents significant advancements in understanding and managing EMF exposure in modern multi-antenna communication systems, providing a promising route to safer and more efficient wireless communication technologies.

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