EMC characterization of the UWB-based wireless positioning and communication experiment (wireless Compose) for the ISS

This paper presents the results of an electromagnetic compatibility measurement campaign, which was performed for a wireless experiment for sensing and positioning (wireless Compose) to be deployed in the Columbus module of the International Space Station (ISS). The experiment allows the monitoring of environmental parameters and it demonstrates the motion tracking of astronauts or free-flying objects by utilizing impulse radio - ultra wideband (IR-UWB) in combination with Micro Electromechanical Systems (MEMS) sensors. Recent work revealed a great potential in utilizing wireless sensor networks (WSN) in space habitats; however, wireless systems can interfere with already existing and almost sensitive on-board systems. Therefore, a detailed analysis of the electromagnetic characteristics is mandatory to avoid any incompatibilities with the ISS equipment. The paper introduces the tested hardware and describes the measurement flow in detail. Finally, the results are presented, which focus on the radiated emissions and radiated susceptibility.