Presentation 2004/10/14
Evaluation of interference from UWB devices into FSS systems and new technical approach of satellite system using wideband spreading signals(System Engineering II)(Joint Conference on Satellite Communications 2004(JC-SAT 2004))
Naoki FUKE, Takeo OHSEKI, Hisato IWAI, Mitsuo NOHARA, Nobuyuki KAWAI,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) In this paper, the effect of interference from ultra-wideband (UWB) devices into Fixed Satellite Service (FSS) systems is evaluated. Some examples of the methodologies for the evaluation are also presented. UWB devices are expected to achieve high-speed short-range communication for a number of applications, and technologies for UWB devices are being studied at standardization bodies. In contrast to their benefits, the emissions from UWB devices would cause harmful interference into the existing FSS systems. We evaluate the magnitude of aggregate interference into the uplink and downlink of the FSS systems. The results of the most studies so far indicate that the interference into the downlink in 4/7GHz band is more critical as compared to the interference into the uplink in 6/8GHz band. These results were sent to the special Task Group at ITU-R which considers technical issues to facilitate the study on the compatibility between UWB devices and radiocommunication services. Furthermore, a new technical approach to explore new satellite services using wideband spreading signals, which operate within frequency bands allocated to the FSS, is introduced. A preliminary analysis shows there will be a possibility to implement an economical service, e. g. broadcast type transmission, by virtue of technology imported from the terrestrial short-range communications.
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Keyword(in English) Fixed Satellite System / UWB / Interference / Wideband Spreading Signal / Overlay
Paper # SAT2004-126
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Committee SAT
Conference Date 2004/10/14(1days)
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Language ENG
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Evaluation of interference from UWB devices into FSS systems and new technical approach of satellite system using wideband spreading signals(System Engineering II)(Joint Conference on Satellite Communications 2004(JC-SAT 2004))
Sub Title (in English)
Keyword(1) Fixed Satellite System
Keyword(2) UWB
Keyword(3) Interference
Keyword(4) Wideband Spreading Signal
Keyword(5) Overlay
1st Author's Name Naoki FUKE
1st Author's Affiliation YRP Research Center, KDDI R&D Laboratories()
2nd Author's Name Takeo OHSEKI
2nd Author's Affiliation YRP Research Center, KDDI R&D Laboratories
3rd Author's Name Hisato IWAI
3rd Author's Affiliation YRP Research Center, KDDI R&D Laboratories
4th Author's Name Mitsuo NOHARA
4th Author's Affiliation YRP Research Center, KDDI R&D Laboratories
5th Author's Name Nobuyuki KAWAI
5th Author's Affiliation International Network Department, KDDI Corporation
Date 2004/10/14
Paper # SAT2004-126
Volume (vol) vol.104
Number (no) 351
Page pp.pp.-
#Pages 6
Date of Issue