Manuscript received November 28, 2017; revised December 24, 2017; accepted January 1, 2018. Date of publication January 15, 2018; date of current version October 3, 2018. This work was supported in part by Fundamental Research Funds for the Central Universities under Grant 2015YJS027 and in part by Natural Science Foundation under Grant 61772064. Paper no. 17-2732. (Corresponding author: Yun Liu.) J.-S. Fu, Y. Liu, and Z.-J. Zhang are with the School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China (e-mail: 14111005@bjtu.edu.cn; liuyun@bjtu.edu.cn; zhangzhenjiang@bjtu.edu.cn).