Manuscript received February 16, 2020; revised August 4, 2020; accepted September 22, 2020. Date of publication September 28, 2020; date of current version February 4, 2021. This work was supported in part by Major Project of Science and Technology Research Program of Chongqing Education Commission of China under Grant KJZD-M201900601; in part by the Natural Science Foundation of China under Grant 61702066 and Grant 61903056; in part by the Ph.D. Project of Chongqing University of Posts and Telecommunications under Grant BYJS201802; in part by the Graduates Research Innovation Program of Chongqing under Grant CYB18168; in part by Chongqing Research Program of Basic Research and Frontier Technology under Grant cstc2017jcyjAX0256 and Grant cstc2018jcyjAX0154; and in part by the joint Ph.D. Program at St. Francis Xavier University funded by State Scholarship Fund of the China Scholarship Council (CSC) under Grant 201808500138. (Corresponding author: Laurence T. Yang.) Yinxue Yi is with the School of Communications and Information Engineering, Chongqing Key Laboratory of Mobile Communications Technology, Engineering Research Center of Mobile Communications, and Ministry of Education, Chongqing University of Posts and Telecommunications, Chongqing 400065, China, and also with the Department of Computer Science, St. Francis Xavier University, Antigonish, NS B2G 2W5, Canada (e-mail: yiyinxue@126.com).