Dr. Letaief is a world-renowned leader in wireless communications and networks. In these areas, he has over 630 journal and conference papers and given invited keynote talks as well as courses all over the world. He has made 6 major contributions to IEEE Standards along with 15 patents. He is the founding Editor-in-Chief of IEEE Transactions on Wireless Communications and was instrumental in organizing many IEEE flagship conferences as well as serving IEEE in many leadership positions, including IEEE ComSoc President, IEEE ComSoc Vice-President for Technical Activities and IEEE ComSoc Vice-President for Conferences. He is recipient of 6 Teaching awards and 16 IEEE Best Paper awards. He is a Member of the United Stated National Academy of Engineering; Member of the Hong Kong Academy of Engineering Sciences, ISI Highly Cited Researcher, IEEE Fellow, HKIE Fellow, and recipient of 2007 IEEE Joseph LoCicero Award; 2009 IEEE Marconi Prize Award; 2010 Purdue Outstanding Electrical and Computer Engineer Award, 2011 IEEE Harold Sobol Award, 2011 IEEE Wireless Communications Technical Committee Recognition Award, 2016 IEEE Marconi Prize Paper Award in Wireless Communications, and 2017 IEEE Cognitive Networks Technical Committee Publication Award.