Faculty of Electrical Engineering, Czech Technical University, Technickxc3xa1 2, Prague, 166 27, Czech Republic. holecm@fel.cvut.cz.|Faculty of Electrical Engineering, Czech Technical University, Technickxc3xa1 2, Prague, 166 27, Czech Republic. kuzelo1@gmail.com.|Faculty of Electrical Engineering, Czech Technical University, Technickxc3xa1 2, Prague, 166 27, Czech Republic. zelezny@fel.cvut.cz.