1. Ericsson LMI, Athlone, Westmeath, Ireland
2. I2CAT Foundation, Barcelona, Spain
3. IHP—Leibniz-Institut für Innovative Mikroelektronik, Frankfurt (Oder), Germany
4. Smart Internet Laboratory, University of Bristol, Bristol, U.K.
5. Department of Signal Theory, Telematics and Communications (DTSTC), University of Granada, Granada, Spain