is a researcher at Advanced Telecommunication Laboratory of SONY Computer Science Laboratories, Tokyo, Japan. He is also an assistant professor at Keio University, Yokohama, Japan. He received an M.S. in engineering science from University of California at Berkeley and a Ph.D. in computer science from the University of Texas at Austin. He has worked at Bell Laboratories of Lucent Technologies, U.S.A. before joining Keio University in 1997. He joined SONY Computer Science Laboratories, Inc. in Tokyo, Japan in 1998. His research interests include software radio, wireless communication, reconfigurable system, FPGA, and VLSI design automation.