1. Department of Telecommunications Engineering, Faculty of EngineeringKing Mongkut's Institute of Technology LadkrabangBangkok10520Thailand
2. Department of MicroelectronicsBrno University of TechnologyTechnicka 3058/10612 00BrnoCzech Republic
3. Faculty of Biomedical EngineeringCzech Technical University in Praguenám. Sítná3105KladnoCzech Republic