Bangquan Zhang Weikai Xu Yunfeng Wu Lin Wang 0003 Design and Performance Analysis of Multilevel Code-Shifted $M$ -Ary Differential Chaos Shift Keying System. 1257-1261 2019 66-II IEEE Trans. Circuits Syst. II Express Briefs 7 https://doi.org/10.1109/TCSII.2018.2880779 db/journals/tcas/tcasII66.html#ZhangXWW19