1. Department of Electrical Engineering and Information Technologies, University of Naples Federico II, Italy
2. Univ Lyon, ECL, INSA Lyon, CNRS, UCBL, CPE Lyon, INL, UMR5270, France
3. Department of Electrical and Computer Engineering, University of Alberta, Canada
4. University of Rennes, Inria, CNRS, IRISA, UMR 6074, France