**Author details**

Hao Wu1,2

1 Department of Wireless Product Research and Design Institute, ZTE Corporation, Shenzhen, China

2 State Key Laboratory of Mobile Network and Mobile Multimedia Technology, ZTE Corporation, Shenzhen, China

\*Address all correspondence to: wu.hao19@zte.com.cn

© 2020 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
