Gallium nitride HEMT
A gallium nitride (GaN) semiconductor is more resistant to breakdown due to electrical fields than conventional semiconductor materials, such as silicon (Si) or gallium arsenide (GaAs). When used in a HEMT structure, it enables high-speed operation at high voltages. For more information: http://www.fujitsu.com/global/news/pr/archives/month/2005/20051205-02.html
 HEMT (high electron-mobility transistor)
A field-effect transistor that takes advantage of the fact that electrons at the junction between two different compound semiconductors move more rapidly than when they are within conventional semiconductors. Fujitsu led the industry by pioneering development of this transistor structure in 1980.
 Digital pre-distortion technology
Distortion compensation technology in which a signal that can offset the distortion generated by an amplifier is added in advance to the amplifier's input signal.
 Power efficiency of roughly 30%
Refers to efficiency for OFDM-16QAM signals.
 Double the power efficiency of conventional amplifiers
Refers to comparison of amplifiers that are used with currently available 3G systems.
KDDI is the only Japanese information and communication company that comprehensively provides all communications service, from fixed to mobile. KDDI is aggressively working towards realization of the coming Ubiquitous Network Society through its ability to develop leading-edge fixed and mobile communications networks and services to support them and through the ability to carry out technical R&D at a level unsurpassed anywhere. KDDI group companies had approximately 14,021 staffs and sales in the fiscal year ended March 31, 2006 was 3,060.8billion yen.
See http://www.kddi.com/english/ for further information.
Fujitsu is a leading provider of customer-focused IT and communications solutions for the global marketplace. Pace-setting device technologies, highly reliable computing and communications products, and a worldwide corps of systems and services experts uniquely position Fujitsu to deliver comprehensive solutions that open up infinite possibilities for its customers' success. Headquartered in Tokyo, Fujitsu Limited (TSE:6702) reported consolidated revenues of about 4.8 trillion yen (US$40.6 billion) for the fiscal year ended March 31, 2006. For more information, please see:http://www.fujitsu.com
Founded in 1968 as a wholly owned subsidiary of Fujitsu Limited, Fujitsu Laboratories Limited is one of the premier research centers in the world. With a global network of laboratories in Japan, China, the United States and Europe, the organization conducts a wide range of basic and applied research in the areas of Multimedia, Personal Systems, Networks, Peripherals, Advanced Materials and Electronic Devices. For more information, please see: http://jp.fujitsu.com/group/labs/en/.
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Date: 02 March, 2007
Company: KDDI Corporation, Fujitsu Limited, Fujitsu Laboratories Ltd., , ,