Xincheng Zhanggraduated from Beijing University of Posts and Telecommunications (Beijing, China) in 1992. He has been working for China Mobile for 20 years as a technical expert with a solid understanding of wireless communication technologies. He is working as a senior wireless network specialist in the fields of antenna arrays, analog/digital signal processing, radio resource management, propagation modeling, and so on. He has participated in many large-scale wireless communication system designs for a variety of cellular systems using various radio access technologies, including the Global System for Mobile Communication (GSM), Code Division Multiple Access (CDMA), Universal Mobile Telecommunications System (UMTS), and Long Term Evolution (LTE). He is the author or coauthor of eight books on Wideband Code Division Multiple Access (WCDMA), Worldwide.

Xiaojin Zhoureceived his first master''s degree in electronic and information engineering from Beijing University of Posts and Telecommunications (Beijing, China), and his second master''s degree in the engineering management program from the University of Ottawa (Ottawa, Canada). He has worked for China Mobile for many years, and has extensive knowledge on wireless communication systems and data communication networks. He now works for Ericsson, which he joined in 2008, and is actively participating in leading-edge LTE product design and implementation. He is the coauthor of several books on wireless technologies, including WiMAX and LTE.