Direct Digital RF/MMW technologies – Challenges for Beyond Nyquist Frequency Range
Digital RF technology has been developed and applied to below 6GHz wireless applications. By replacing the IC die consumptive RF/analog circuit blocks by digital signal processing/circuits, digital rich/small transceiver can be realized. Since this technology is based on the Nyquist theory, the operational frequency of the circuit is limited by the Nyquist frequency (= 1/2 of sampling clock frequency.) Since the clock frequency of conventional transceiver is below 10GHz, the operational RF frequency.
Noriharu Suematsu was born in Tokyo, Japan, in 1962. He received the B.S., M.S., and Dr.Eng. degrees from Waseda University, Tokyo, Japan.
In 1987, he joined the Mitsubishi Electric Corporation, Japan. From 1992 to 1993, he was a visiting researcher at the University of Leeds, U.K. Since 2010, he has been a professor of the Research Institute of Electrical Communication, Tohoku University, Japan. His research interests are microwave/millimeter-wave transceivers including MMICS’s/Si-RFICs and digital RF technologies.
Professor Suematsu served as a general chair of IEEE RFIT2015, APMC2014 and served as a TPC member of IEEE IMS, RFIC symposium and EuMC.