Report on measurement campaigns for total radiated power of one UltraWideBand (UWB) device to support EU RF spectrum regulation

Ultra-Wideband (UWB) is a communications technology that employs a wide bandwidth (typically defined as greater than 20% of the centre frequency or 500MHz). The transmission centre frequency varies with the identifier of the communication channel (e.g., 6.4896 GHz). Because of such large radio frequency spectrum occupancy, spectrum regulations have to be carefully defined to avoid the risk of interference with other wireless services coexisting in the same bands. The next update cycle of the UWB regulation in the European Union will be started based on the System Reference Document (SRD) SRDoc (TR 103 750) from the European Telecommunication Standardization Institute (ETSI) asking for a band extension of some applications (mainly location tracking and sensor applications) up to 10.6 GHz. The focus of the new investigations in SE24 will be the band 8.5 GHz to 10.6 GHz using a set of mitigation techniques and mechanisms to protect the incumbent services in the band (e.g., X-band radio navigation and radiolocation systems). One of the mitigation factors to be considered is the Total Radiated Power (TRP) spectral density (SD) TRPSD. The TRPSD parameter is not new in the UWB regulation and has been used in the sensor regulation of UWB since several years. Nevertheless, systematic measurements of the value using typical UWB devices for other application have never been performed. In order to be able to use realistic values in the Conférence européenne des administrations des postes et des télécommunications (CEPT), a study was conducted in the JRC on one UWB device to support a realistic evaluation of the interference effects of UWB into other systems and services.