1. Karlsruhe Institute of Technology (KIT); Engesserstr. 5 D-76131 Karlsruhe Germany
2. Bosch Rexroth Monitoring Systems GmbH; Else-Sander-Str. 8 D-01099 Dresden Germany
3. Fraunhofer Institute for Solar Energy Systems; Heidenhofstr. 2 D-79110 Freiburg Germany
4. Section of Electronics and Information System Technology; Democritus University of Thrace; GR-67100 Xanthi Greece
5. Institute of Electromagnetic Fields (IFH), Swiss Federal Institute of Technology (ETH); CH-8092 Zurich Switzerland