1. Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, 00-662 Warszawa, Poland
2. Faculty of Technical Sciences, University of Warmia and Mazury, 10-719 Olsztyn, Poland
3. Institute of Telecommunications, Warsaw University of Technology, 00-661 Warszawa, Poland
4. Département d’informatique et d’ingénierie, Université du Québec en Outaouais, Gatineau, QC J8X 3X7, Canada