Tetsushi Ikegami was born in 1957 in Tokyo, Japan.  He received B. E., M. E. and Dr. E. degrees all in electrical engineering from Meiji University, Kawasaki, Japan in 1980, 1982, 1995, respectively.  In 1985 he joined the Communications Research Laboratory, Ministry of Posts and Telecommunications, and undertook developments of mobile, fixed and inter satellite communication systems until 1997.  From 1991 to 1992 he was a visiting scholar at the University of Illinois at Urbana-Champaign.

Since 1997 he has been with the School of Science and Technology, Meiji University, where he is now a Professor at Department of Electronics and Bioinformatics.   From 2008 to 2009 he was a Visiting Professor at Stanford University.
His research interests are in the areas of satellite and fading channels, modulation, coding, spread spectrum and wideband systems. 
He was an associate editor of IEICE Transactions on Communications and was the chair of Spread Spectrum Technology (2001-2002)　and Wideband Systems (2002-2003) Technical Groups of IEICE, and the Technical Program Chair of the IEEE Joint UWBST & IWUWBS 2004 conference.  From 2007 to 2008, he served as a Chair of the Student Activities Committee of the IEEE Tokyo Section. Dr. Ikegami is a member of IEEJ, SITA, IEEE, and a senior member of IEICE.