@inproceedings{HuGrScWa13, author = {Yulin Hu and James Gross and Anke Schmeink and Tong Wang}, title = "Maximizing Energy Efficiency for Multiple DF Relay System with {QoS} Constraint", pages = "419-423", booktitle = "International Symposium on Wireless Communication Systems 2013 (ISWCS)", address = {Ilmenau, Germany}, month = Aug, year = 2013, hsb = {hsb999910311772 }, }