INSIDE the Laboratory

Broadband Engineering Division

Advanced Wireless Information Technology Laboratory

Noriharu Suematsu, Professor
Suguru Kameda, Associate Professor
Mizuki Motoyoshi, Assistant Professor

For the next generation wireless systems which include terrestrial & satellite communications, dependable connectivity and green wireless information technologies (IT) will be the key issues. To solve the issues of wireless communication, we cover the whole technical field from lower to higher layers, i.e., signal processing, RF/mixed signal device, antenna, modem, and network technologies.
Our laboratory started in April 2010. As of January 2016, there are 19 members in our laboratory: Prof. Noriharu Suematsu, Associate Prof. Suguru Kameda, Assistant Prof. Mizuki Motoyoshi, Technical Assistant Ms. Yukie Tomizawa, two Ph. D. candidates, nine Master course students (include two Chinese students), two undergraduate-school students, one research student from China and one short-term exchange student from United States of America. Moreover, some researchers from other companies join our laboratory.
Let us introduce three representative research topics from our laboratory.

1. RF front-end modules for mobile terminal of ultra-broadband wireless communication system with millimeter-wave technologies: To realize ultra-broadband wireless communication using the millimeter-wave band for the fifth generation cellular phone system (5G) and beyond, we research and develop the RF front-end modules for millimeter-wave band wireless communication terminals.

2. Satellite communication systems for disaster-resilient wireless networks: To provide a large-capacity two-way short message communication through the Quasi-Zenith Satellite System (QZSS), we research the high-density spread-spectrum code-division multiple access (SS-CDMA) technique with a transmission timing control method. Moreover, to prevent telecommunication crisis in future big disasters, we have developed a portable multi-mode very small aperture terminal (VSAT) system.

3. High-efficient network selection scheme using high-accuracy positioning information for heterogeneous wireless system: To accommodate mobile communication traffic projected to increase rapidly by 1,000 times (210 times) in the next ten years, we research heterogeneous wireless networks combined with heterogeneous systems such as cellular phone system, wireless LAN, and so on. For rapid connection to optimum networks, a network selection scheme used with map information (such as channel quality and traffic maps) has been proposed.

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