Affiliation: | (1) Huawei Technologies European Research Centre, Carnotstrasse 4, 10587 Berlin, Germany;(2) Department of Communications Engineering, University of Cantabria, Plaza de la Ciencia s/n, 39005 Santander, Spain;(3) School of Electrical and Computer Engineering, National Technical University of Athens, 9 Iroon Polytechniou str., Athens, 15780, Greece |