Mamoru Sawahashi received his B.S. and M.S. degrees from The University of Tokyo in 1983 and 1985, respectively, and received his Dr. Eng. Degree from the Nara Institute of Science and Technology in 1998. In 1985, he joined the NTT Electrical Communications Laboratories, and in 1992 he transferred to NTT Mobile Communications Network, Inc. (now NTT DOCOMO, INC.). In NTT, he was engaged in the research of modulation/demodulation techniques for mobile radio. He was also engaged in the research and development of radio access technologies for W-CDMA mobile communications and broadband packet radio access technologies for LTE and for LTE-Advanced in NTT DOCOMO. From April 2006, he assumed the position of Professor of the Department of Electronics and Communication Engineering, Musashi Institute of Technology (now Tokyo City University). From 2007 to 2009, he was a part-time director of the Radio Access Development Department of NTT DOCOMO. From 2001 to 2007, he served as an associated editor of IEEE Transaction on Wireless Communications. In 2005, 2006 and 2011, he served as a guest editor of the IEEE JSAC on Intelligent Services and Applications in Next-generation Networks, 4G Wireless Systems, Advances in Multicarrier CDMA, and Distributed Broadband Wireless Communications. He received National Invention and Innovation Award by the Prime Minister, Japan in 2010, and National Invention and Innovation Award by Director-General of the Patent Office, Japan in 2015 for cell search methods for W-CDMA and LTE, respectively.