1. Signal and Information Processing for Sensing Systems, Institute for Bioengineering of Catalonia, The Barcelona Institute of Science and Technology, Baldiri Reixac 10-12, 08028 Barcelona, Spain
2. Department of Electronics, Information and Bioengineering—DEIB, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
3. Department of Electronics and Biomedical Engineering, Universitat de Barcelona, Martí i Franqués 1, 08028 Barcelona, Spain