Fast Discrete Diagnostics of EMC of Complex Co-Located Radio Systems by Using Worst-Case Models of Electromagnetic Spurious Couplings

A technique of high computational efficiency for EMC diagnostics of complex co-located set of radio systems is presented. The technique is based on the following: the use of worst-case models of electromagnetic spurious couplings between antennas (in order to eliminate the second-type errors in detection of dangerous couplings), iterative refinement of these models for the potentially dangerous couplings in the process of solving an EMC problem, and the extra efficient discrete technique for nonlinear behavior simulation of radio receiver operation in complex electromagnetic environment

Estimation of Electromagnetic Background Intensity Created by GSM Cellular Networks Base Stations with High Spatial Density on Urban Area

Estimation of the total intensity of electromagnetic background created by GSM-1800 cellular network base stations with spatial density of 3-9 base stations per square kilometer taking into account intrasystem electromagnetic compatibility of the cellular network (levels of intranetwork interference) was executed based on computer modeling of functioning of the cellular network fragment with the use of X3D three-dimensional model of radio wave propagation and three-dimensional model of the fragment of urban area of Minsk. The results are presented for base stations antenna height of 25-35 m, equivalent isotropic radiated power of 33-58 dBm per frequency channel, and for various spatial population density of 6000-12000 people per square kilometer

Analysis of EMC between Medical Short-Range Devices and Equipment of Wireless Systems Couplings

The analysis of EMC between medical short range devices of body area network system, capsule endoscopy system, active implant system and wireless equipment of mobile stations of cellular communications (LTE and 5G), RLAN equipment, NB IoT sensors operating inside a hospital building is performed. The integrated interference margin is used as a criterion of EMC. Results of the analysis show the following: 1) the equipment of wireless systems can create the interference to all considered types of medical short range devices (as well as medical short range devices can create the interference to receivers of the wireless systems) in case of allocation of emitters and receptors inside the same room or in neighboring rooms; 2) in order to ensure EMC of considered systems, it is advised to set more stringent requirements on characteristics of susceptibility of the medical equipment to radiofrequency electromagnetic fields created by wireless equipment of 4G/5G networks as well as on spurious emissions of transmitters of wireless systems. The results can be used in diagnostics of intersystem EMC in order to ensure safety of use of mobile wireless telecommunication equipment regarding medical vital devices in conditions of mass distribution of 4G/5G wireless information services in hospitals