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Furukawa Review No.30

Development of Ultra Wideband Radio System for Short-Range Radar Applications

Kazutaka Kamimura, Yasushi Aoyagi, Sadao Matsushima, Kouji Horikawa, Hiroyuki Itohara and Yoichi Iso


Recently ultra wideband (UWB) radio systems have been extensively considered in the field of intelligent transport systems (ITS) and communications since Feb. 2002, when the United States Federal Communication Commission (FCC) mitigated its restrictions on noise emission levels to permit UWB radio. Taking notice of automotive short range radar (SRR) in the sub-millimeter wave radio band (22~29 GHz), the authors have been researching and developing this technology and, have taken part in a joint study consortium led by the National Institute of Information and Communication Technology (NICT). As a result of these activities, the authors have successfully developed a UWB multi-function system that features pulse position modulation (PPM) for data communication as well as radar function. The system consists of an antenna, transmitter, receiver, and baseband part. The authors developed the baseband part, which plays a key roll for ranging and communication functions as well as a radio frequency (RF) part. The baseband part was adopted by the NICT, and the system was demonstrated at IWUWB 2005, the international UWB conference held in Dec. 2005. In the demonstration system, the authors also supported the design of an RF receiver, while the other parts, including the antenna and RF transmitter devices, were provided by the NICT. The system simultaneously realized both ranging detection at a resolution of less than 10 cm and a communication function up to 1 Mbps. The authors report the structure and performance of the developed system as well as an outline and trends in UWB radio systems.

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