His current research interests include space information networks, mmWave communications, and massive MIMO.
Currently, he is Editor-in-Chief of Journal of Communications and Information Networks and Area Editor of IEEE Transactions on Wireless Communications. He served as Editor-in-Chief of IEEE Wireless Communications Letters from 2016 to 2019. He also served as an Editor for IEEE Transactions on Communications (2015-2018), IEEE Transactions on Cognitive Communications and Networking (2015-2017), IEEE Journal on Selected Areas in Communications - Cognitive Radio Series in 2012-2014 and IEEE Transactions on Wireless Communications (2010-2015). Currently, he serves as Chair of IEEE Communications Society Wireless Communications Technical Committee. He is Vice Director of IEEE Communications Society Asia Pacific Board. He is a member of Board of Governors of IEEE Communications Society. He is Fellow of the IEEE and Fellow of the IET.