Abstract

The goal of this paper is to experimentally assess the field enhancement and hotspot size of radio frequency electromagnetic fields created by the Maximum Ratio Combining (MRC) precoding scheme using lab measurements at 3.5, 5.5 and 11 GHz. MRC is an adaptive precoding scheme used by Massive Multiple Input Multiple Output systems, one of the enabling techniques of the fifth generation of telecommunications (5G). A virtual antenna array was used to compare MRC with two passive precoding schemes: the Random Phase Model (RPM) and the Centerline Beam Model (CBM). The field enhancement going from CBM to MRC was largest in obstructed line of sight (OLOS), ranging from 1.9 to 7.4 dB. The field enhancement going from RPM to MRC was about 9.5 dB across frequency bands in both line of sight (LOS) and OLOS. The hotspot size, quantified by the full width at half maximum (FWHM), ranged from 0.5 wavelengths to one wavelength.

中文翻译：

---

第五代网络中最大比率场组合所引起的场增强和射频热点的大小。

摘要

本文的目的是使用实验室，实验室测量的3.5、5.5和11 GHz频率，通过实验来评估最大比合并（MRC）预编码方案创建的射频电磁场的场增强和热点大小。MRC是大规模多输入多输出系统使用的一种自适应预编码方案，该系统是第五代电信（5G）的使能技术之一。使用虚拟天线阵列将MRC与两种无源预编码方案进行比较：随机相位模型（RPM）和中心线波束模型（CBM）。在阻塞视线（OLOS）中，从CBM到MRC的场增强最大，范围从1.9到7.4 dB。从RPM到MRC的视场增强在视线（LOS）和OLOS的整个频带上约为9.5 dB。热点大小，