Tianyi Zhang-Department of Electronic and Electrical Engineering,Southern University of Science and Technology,Shenzhen 518055,China;Department of Electronic Engineering,The Chinese University of Hong Kong,Hong Kong,China;Shenzhen Research Institute,The Chinese University of Hong Kong,Hong Kong,China

Ruhul Amin Khalil;Nasir Saeed;Mohammad Inayatullah Babar;Tariqullah Jan;Sadia Din-Department of Electrical Engineering,Faculty of Electrical and Computer Engineering,University of Engineering and Technology,Peshawar 25120,Pakistan;Department of Electrical Engineering,Northern Border University,Arar 73222,Saudi Arabia;College of Science and Engineering,Hamad Bin Khalifa University,Doha 34110,Qatar

Wenzhang Liu;Lu Dong;Dan Niu;Changyin Sun-School of Artificial Intelligence,Anhui University,Hefei 230039,and also with the Peng Cheng Laboratory,Shenzhen 518055,China;School of Cyber Science and Engineering,Southeast University,Nanjing 211189,China;School of Automation,Southeast University,Nanjing 210096,China;School of Automation,Southeast University,Nanjing 210096;Peng Cheng Laboratory,Shenzhen 518055,China

Jiaqi Wang;Lina Wang-School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing 100083, China

Wei Huang;Lin Guo;Kai Sun-College of Electronic Engineering, Inner Mongolia University, Hohhot 010021, China

TAO Lin;SUN Junren;LI Guangchen;ZHU Bocheng-School of Electronics Engineering and Computer Science,Peking University,Beijing 100871,China

WANG Chaowei;CUI Yuling;DENG Danhao;WANG Weidong;JIANG Fan-School of Electronic Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China;Key Laboratory of Universal Wireless Communications,Ministry of Education,Beijing 100876,China;School of Telecommunications and Information Engineering,Xi'an University of Posts and Telecommunications,Xi'an 710121,China

LIU Chunhui;WANG Meilin;DONG Zanliang;WANG Pei-Institute of Unmanned System,Beihang University,Beijing 100191,China;School of Electronic and Information Engineering,Beihang University,Beijing 100191,China

WU Guangyu;GU Jiangchun-Department of Computer Science and Technology,University of Science and Technology of China,Hefei 230026,China;School of Communication Engineering,Army Engineering University of PLA,Nanjing 210000,China

LI Zuguang;WANG Wei;GUO Jia;ZHU Youwen;HAN Lu;WU Qihui-College of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China;Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space,Ministry of Industry and Information Technology,Nanjing 211106,China

CHENG Lan;ZHANG Jing;NI Zihang;YAN Gaowei-Taiyuan University of Technology,Taiyuan 030024,China;Xi'an Branch of China Telecom Co.Ltd.,Xi'an 71000,China

GENG Yuhui;CAO Xianbin;CUI Huanxi;XIAO Zhenyu-School of Electronic and Information Engineering,Beihang University,Beijing 100191,China

Yanjuan Hu;Weiwei Ru;Qiang Liu;Zhanli Wang-School of Mechatronic Engineering,Changchun University of Technology,Changchun 130012,China;School of Mechanical and Aerospace Engineering,Jilin University,Changchun 130022,China

Wangming Li;Dong Han;Liang Gao;Xinyu Li;Yang Li-The State Key Laboratory of Digital Manufacturing Equipment and Technology,Huazhong University of Science and Technology,Wuhan 430074,China

Chengxiao Liu;Wei Feng;Xiaoming Tao;Ning Ge-Department of Electronic Engineering,Tsinghua University,Beijing 100084,China;Beijing National Research Center for Information Science and Technology,Tsinghua University,Beijing 100084,China

Cheng Liu;Chengzhi Xing;Qihou Hu;Qihua Li;Haoran Liu;Qianqian Hong;Wei Tan;Xiangguang Ji;Hua Lin;Chuan Lu;Jinan Lin;Hanyang Liu;Shaocong Wei;Jian Chen;Kunpeng Yang;Shuntian Wang;Ting Liu;Yujia Chen-Department of Precision Machinery and Precision Instrumentation,University of Science and Technology of China,Hefei 230026,China;Centerfor Excellence in Regional Atmospheric Environment,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China;Key Lab of Environmental Optics and Technology,Anhui Institute of Optics and Fine Mechanics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China;Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes,University of Science and Technology of China,Hefei 230026,China;Anhui Province Key Laboratory of Polar Environment and Global Change,University of Science and Technology of China,Hefei 230026,China;Institute of Physical Science and Information Technology,Anhui University,Hefei 230601,China;School of Environment and Civil Engineering,Jiangnan University,Wuxi 214122,China;School of Environmental Science and Optoelectronic Technology,University of Science and Technology of China,Hefei 230026,China;School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China

YUAN Dongdong;WANG Hankai;BAI Jiaqi-School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China

Yeyan Xu;Liangzhong Yao;Siyang Liao;Yaping Li;Jian Xu;Fan Cheng-School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China;China Electric Power Research Institute,Nanjing 210008,China;China Electric Power Research Institute,Beijing 100085,China

WANG Pengfei;SONG Wei;SUN Geng;WEI Zongzheng;ZHANG Qiang-Schoolof Computer Science and Technology,Dalian University of Technology,Dalian 116024,China;Schoolof Computer Science and Technology,Jilin University,Changchun 130015,China;Key Laboratory of Symbolic Computing and Knowledge Engineer?ing,Jilin University,Changchun 130015,China

JIA Haonan;HE Zhenqing;TAN Wanlong;RUI Hua;LIN Wei-NationalKey Laboratory of Science and Technology on Communica?tions,University of Electronic Science and Technology of China,Chengdu 611731,China;ZTE Corporation,Shenzhen 518057,China;State Key Laboratory of Mobile Network and Mobile Multimedia Tech?nology,Shenzhen 518055,China