Funding for this research was provided by:
National Natural Science Foundation of China (11974189)
Postdoctoral Research Foundation of China (2018M642293)
the open research fund of the Key Lab of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications (JZNY201908)
Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX18-0914)
Article History
Received: 21 December 2019
Accepted: 9 September 2020
First Online: 22 September 2020