1. Department of Electrical and Computer Engineering; University of Coimbra, Rua Sílvio Lima; Coimbra 3030-290 Portugal
2. INESC Coimbra, Rua Sílvio Lima; Coimbra 3030-290 Portugal
3. KIOS Research and Innovation Center of Excellence and Department of Electrical and Computer Engineering; University of Cyprus; Nicosia 1678 Cyprus