[1] Univ Pisa, Dept Informat Engn, Pisa, Italy
[2] Univ Florida, Dept Elect & Comp Engn, Gainesville, FL USA
[3] IEEE, Piscataway, NJ USA
[4] Inst Engn & Technol, Brussels, Belgium
[5] European Acad Sci, Brussels, Belgium
[6] BIT, Dept Elect Engn, Beijing, Peoples R China
[7] Stanford Univ, Stanford, CA 94305 USA
[8] UCL, London, England
[9] Sch Informat & Elect, Beijing, Peoples R China
[10] Inst Elect & Technol, Beijing, Peoples R China
[11] Chinese Inst Elect, Beijing, Peoples R China
[12] Queensland Univ Technol, Brisbane, Qld, Australia
[13] Curtin Univ Technol, Telecommun, Perth, WA, Australia
[14] Tech Univ Darmstadt, Darmstadt, Germany
[15] Signal Proc Grp, Darmstadt, Germany