Wei Feng, Yinghui Quan, School of Electronic Engineering, Xidian University, China; Gabriel Dauphin, L2TI, Institut Galilée, University Paris XIII, France; Puxia Wu, Shaanxi Academy of Forestry, China; Bowen Bie, School of Electronic Engineering, Xidian University, China; Yingping Tong, Xiaoguang Yuan, Jing Li, Mengdao Xing, Xidian University, China