[Zhou, Feng; Zhu, Peidong] Changsha Univ, Sch Elect Informat & Elect Engn, Changsha, Hunan, Peoples R China.
[Xi, Yanhui] Changsha Univ Sci & Technol, Sch Elect & Informat Engn, Changsha, Hunan, Peoples R China.
[Zhu, Peidong] Natl Univ Def Technol, Coll Comp Sci & Technol, Changsha, Peoples R China.
[Xi, Yanhui] Changsha Univ Sci & Technol, Sch Elect & Informat Engn, 45,Chiling Rd, Changsha 410076, Hunan, Peoples R China.