My research interests have evolved over the last 20 years from adaptive signal processing in my PhD years, to multi-user detection and CDMA transceiver design in my CWC years, to MIMO processing, cooperative diversity, phase, frequency and channel estimation in multi-carrier modulation, spectrum sensing for cognitive radio, and wireless resource allocation in my U of T years. Since joining NUS in mid-2011, I have worked on green communications, smart grid and heterogeneous networks, satellite communications, and network architecture and cyber-security in the Internet of Things. I have served in various capacities in the international research community, including being Associate Editor at IEEE Transactions on Wireless Communications, IEEE Transactions on Vehicular Technology, IEEE Signal Processing Letters, IEEE Wireless Communications Letters and Wiley Journal of Emerging Telecommunications Technologies in the past. Since September 2013, I have served as an Area Editor at the IEEE Transactions on Wireless Communications. I serve regularly on the technical program committees and organizing committees of international conferences such as IEEE Globecom, IEEE International Conference on Communications (ICC) and IEEE Wireless Communications and Networking Conference (WCNC). I am a TPC co-chair for IEEE Globecom 2017 to be held in Singapore in December 2017, and was the TPC co-chair for the Singapore-based conference IEEE International Conference on Communication Systems (ICCS) in 2000, 2012, 2014 and 2016, the TPC co-chair for the PHY Track at IEEE WCNC 2014 (Istanbul), and TPC co-chair for IEEE International Conference on Communications in China (ICCC) 2014 (Shanghai). Going back further, I was also TPC co-chair for the SPC symposium in IEEE ICC 2010 (Cape Town) and local arrangements co-chair for IEEE International Symposium on Information Theory (ISIT) 2008 (Toronto).