1. Thuringian Center of Innovation in Mobility, RF & Microwave Research Group, Technische Universität Ilmenau, 98693 Ilmenau, Germany
2. IMMS Institut für Mikroelektronik- und Mechatronik-Systeme Gemeinnützige GmbH (IMMS GmbH), 98693 Ilmenau, Germany
3. Chair of Navigation, RWTH Aachen University, 52074 Aachen, Germany
4. Institute of Communications and Navigation, German Aerospace Center (DLR), 82234 Weßling, Germany