1. DETI - Department of Electronics, Telecommunications and Informatics, Universidade de Aveiro, Portugal and IEETA - Institute of Electronics and Informatics Engineering of Aveiro, Universidade de Aveiro, Portugal
2. DEGEIT - Department of Economics, Management, Industrial Engineering and Tourism, Universidade de Aveiro, Portugal and IEETA - Institute of Electronics and Informatics Engineering of Aveiro, Universidade de Aveiro, Portugal
3. DETI - Department of Electronics, Telecommunications and Informatics, University of Aveiro, Portugal and IEETA - Institute of Electronics and Informatics Engineering of Aveiro, University of Aveiro, Portugal
4. DETI - Department of Electronics, Telecommunications and Informatics, University of Aveiro, Portugal and IEETA- Institute of Electronics and Informatics Engineering of Aveiro, University of Aveiro, Portugal