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IEICE Transactions on Communications 2008 E91-B(2):518-526; doi:10.1093/ietcom/e91-b.2.518
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Copyright © 2008 The Institute of Electronics, Information and Communication Engineers

Regular Section -- Papers -- Wireless Communication Technologies

0.7-GHz-Bandwidth DS-UWB-IR System for Low-Power Wireless Communications

Ryosuke FUJIWARA1, Akira MAEKI2, Kenichi MIZUGAKI1, Goichi ONO1, Tatsuo NAKAGAWA1, Takayasu NORIMATSU1, Masaru KOKUBO1, Masayuki MIYAZAKI1, Yasuyuki OKUMA1, Miki HAYAKAWA1, Shinsuke KOBAYASHI2, Noboru KOSHIZUKA2 and Ken SAKAMURA2

1 The authors are with Hitachi, Ltd., Kokubunji-shi, 185-8601 Japan. E-mail: ryosuke.fujiwara.mb{at}hitachi.com, 2 The authors are with YRP Ubiquitous Networking Lab., Tokyo, 141-0031 Japan.


  Abstract

A direct-sequence ultra-wideband impulse radio (DS-UWB-IR) system is developed for low-power wireless applications such as wireless sensor networks. This system adopts impulse radio characterized by a low duty cycle, and a direct-sequence 0.7-GHz bandwidth, which enables low-power operation and extremely precise positioning. Simulation results reveal that the system achieves a 250-kbps data rate for 30-m-distance wireless communications using realistic specifications. We also conduct an experiment that confirms the feasibility of our system.

Key Words: impulse radio, LR-WPAN, UWB, wireless sensor networks

Manuscript received February 27, 2007. Manuscript revised August 21, 2007.


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