Funding for this research was provided by:
National Mobile Communications Research Laboratory Southeast University (No. 2020D16)
Jiangsu Provincial Key Research and Development Program (BE2019017)
Six Talent Peaks Project in Jiangsu Province (DZXX-008)
Open Research Fund Key Laboratory of Wireless Sensor Network and Communication, Chinese Academy of Sciences (20190914)
Article History
Received: 6 March 2020
Accepted: 1 October 2020
First Online: 4 November 2020
Competing interests
: The authors declare that they have no competing interests.