1. Universität Paderborn/C-LAB, Fürstenallee 11, D-33094 Paderborn, Germany
2. Siemens SBS C-LAB, Fürstenallee 11, D-33102 Paderborn, Germany
3. Universität Siegen, Institute of Theoretical Electrical Engineering and Photonics, Hölderlinstraße 3, D-57068 Siegen, Germany
4. Universität Paderborn, Theoretical Electrical Engineering, Warburger Straße 100, D-33098 Paderborn, Germany