Empirical analysis of electric field strength long-term variability for GSM/DCS/UMTS downlink band

Abstract

The long-term variability of electric field strength, obtained by band selective measurements for GSM 900MHz, DCS 1800MHz and UMTS 2100MHz downlink band in realistic mobile network environment, is considered in this paper. Intensive measurements were carried out for 7 days at each of 7 different locations in an urban area of Belgrade. The measurement results show that each day can be divided into two distinctive periods: one with higher levels of electric field (9h-23h) and one with lower ones (23h-9h). Regarding the days of the week, the results show that the weekend days are slightly different from the working days. Having in mind the need for determination of values averaged over the defined time period, additional uncertainty stemming from telecommunication traffic and transmitter functionalities must be taken into account. Mentioned uncertainty was determined for different time intervals of averaging: 10s, 30s, 1min, 6min, 15min, 30min, 1h, 3h, 5h, 10h, 14h and 24h. Results show that the uncertainty falls within a range of 4.04-12.11% (GSM), 2.71-7.92% (DCS) and 4.69-14.69% (UMTS), for 6 different categories defined with regard to the days of the week and the specific day periods.

Comparison of Average Total EMF Exposure for Microcell/Macrocell Topologies Using Novel Methodology Based on Operational Network Measurements

“…2. Some of them were used for the observed period, and some in the longer period for assessing load patterns [29], user profiles, used applications, to compare power samples in network reports and drive-test measurements, etc.…”

Electromagnetic Field Levels in Built-up Areas with an Irregular Grid of Buildings: Modeling and Integrated Software

“…A Rohde-Schwarz FSH8 spectrum analyzer, operating from 9 kHz to 8 GHz and with an input impedance of 50 Ohm, was used to measure the electric field. Given the daily periodic pattern of the transmitted RBS power [32,33], which follows the traffic load and present variations of about 8-9 dBm between day and night The application allows a user to collect specific information directly from the system. Originally, we created our application in an Android development environment based on the Java Software Development Kit (SDK) 4 and Android 6.0.…”

“…A Rohde-Schwarz FSH8 spectrum analyzer, operating from 9 kHz to 8 GHz and with an input impedance of 50 Ohm, was used to measure the electric field. Given the daily periodic pattern of the transmitted RBS power [32,33], which follows the traffic load and present variations of about 8-9 dBm between day and night [34], all the measurements were performed during the traffic peak hours [32]. At least 15 measurement points were selected for each location, and their position, as well the RBS location.…”

“…Electronics 2020, 8, x FOR PEER REVIEW 12 of 17 [34], all the measurements were performed during the traffic peak hours [32]. At least 15 measurement points were selected for each location, and their position, as well the RBS location.…”