Optimized Assessment Procedure for Maximal RF Exposure to 5G Massive MIMO Base Stations in Non-Line-of-Sight Scenarios - Part 2: Verification by Field Measurements

European Conference on Antennas and Propagation, pp. 1–5

Abstract

At measurement points (MP) with a line of sight (LOS) to the base station, measurement and extrapolation procedures already exist to determine the maximal exposure in the vicinity of 5G massive MIMO base stations. However, for MPs with non-LOS (NLOS) to the base station, incorrect estimations of the maximal exposure have been found. Based on the theoretical preliminary considerations in part 1 of this paper, the exposure at outdoor NLOS MPs has been determined at 63 MPs in the vicinity of seven Huawei base stations. The gain correction factors previously used by assuming free-space propagation have been compared with the actual gain correction factors derived from the measurements. It is shown that the resulting misestimation and the actual gain correction factors depend on the distance between the MP and the base station. On the basis of this, generalised extrapolation factors are derived for NLOS MPs. Theoretical and numerical investigations are explained in detail in the accompanying paper "part 1".

Authors 5

1. Anna‐Malin Schiffarth Aachen Institute of High Frequency Technology

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Institute of High Frequency Technology,Aachen,Germany

   Institute of High Frequency Technology, RWTH Aachen University, Aachen, Germany

2. Lisa‐Marie Schilling

   Technische Universität Ilmenau

   Affiliation as printed

   TU Ilmenau,RF & Microwave Research Laboratory, Thuringian Center of Innovation in Mobility,Ilmenau,Germany

3. Christian Bornkessel

   Technische Universität Ilmenau

   Affiliation as printed

   TU Ilmenau,RF & Microwave Research Laboratory, Thuringian Center of Innovation in Mobility,Ilmenau,Germany

4. Matthias Hein

   Technische Universität Ilmenau

   Affiliation as printed

   TU Ilmenau,RF & Microwave Research Laboratory, Thuringian Center of Innovation in Mobility,Ilmenau,Germany

5. Dirk Heberling Aachen Institute of High Frequency Technology

   Fraunhofer Institute for High Frequency Physics and Radar Techniques · RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Institute of High Frequency Technology,Aachen,Germany

   Fraunhofer Institute for High Frequency Physics and Radar Techniques, Wachtberg, Germany

   Institute of High Frequency Technology, RWTH Aachen University, Aachen, Germany