1. School of Electronic Engineering, University of Electronic Science and Technology of ChinaNo. 2006 Xiyuan AvenueChengduSichuanPeople's Republic of China
2. Department of Electrical and Computer EngineeringSan Diego State University5500 Campanile DriveSan DiegoCAUSA
3. School of Marine Science and Technology, Northwestern Polytechnical University127 West Youyi RoadXi'anPeople's Republic of China