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Jun-ichi TAKADA Shinobu ISHIGAMI Juichi NAKADA Eishin NAKAGAWA Masaharu UCHINO Tetsuya YASUI
This paper describes the measurement techniques of emissions from UWB devices discussed in ITU-R task group (TG) 1/8 to study the compatibility between ultra-wideband (UWB) devices and radiocommunication services. This paper also provides the background idea behind the measurement methods, as the final output of the discussion, i.e. ITU-R Recommendation, will not contain any citations to the references, nor any "educational" description of the theoretical background.
Akifumi KASAMATSU Akio TANAKA Hiroshi KODAMA Satoru TANOI Yasuhiro KAIZAKI Juichi NAKADA Masami HAGIO Yoshiaki KURAISHI Keren LI Hitoshi UTAGAWA Toshiaki MATSUI Ryuji KOHNO
This paper shows activities of the ultra wideband (UWB) research and development consortium organized by the National Institute of Information and Communications Technology (NICT). Fully CMOS monolithic microwave integrate circuits (MMICs) are designed and fabricated both for the multiband OFDM and the impulse radio. UWB transceivers are constructed with the MMICs as their front-end devices and evaluated by some measurements such as time domain waveform, spectrum, error vector magnitude, and so on. To show the application capabilities of the UWB transceivers, two kinds of video transmission system are constructed and demonstrated.