Presentation 2015-01-29
Experimental Evaluation of Synchronization Accuracy for QZSS SS-CDMA Short Message Communication
Kohei AKIMOTO, Yuji MIYAKE, Suguru KAMEDA, Akinori TAIRA, Noriharu SUEMATSU, Tadashi TAKAGI, Kazuo TSUBOUCHI,
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Abstract(in English) For realizing a safety confirmation system for disaster utilizing Quasi-Zenith Satellite (QZS), we have proposed spread spectrum code division multiple access (SS-CDMA) system to achieve a direct communication from ground terminals to a satellite. This method realizes time and frequency synchronization between terminals using a satellite positioning signal to achieve a high density uplink code division multiple access (CDMA). In this paper, by using a commercially available Global Positioning System (GPS) synchronous oscillator, experimental verification of synchronization accuracy is shown. SS-CDMA communication system is necessary to verify the synchronization accuracy at different satellite constellation, since the simultaneous transmission from a terminal located in Japan is performed. In this validation, the number of visible satellites of a plurality of GPS synchronous oscillator is changed, to verify the synchronization error. As a result, it was shown to be a cumulative distribution function (CDF) 99% or more with respect to the relative error ± 20 ns that is the target value of SS-CDMA.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Quasi-Zenith Satellite (QZS) / Quasi-Zenith Satellite System (QZSS) / spread spectrum (SS) / code division multiple access (CDMA) / SS-CDMA / timing synchronization / experimental verification
Paper # SR2014-96
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Conference Date 2015/1/22(1days)
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Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Experimental Evaluation of Synchronization Accuracy for QZSS SS-CDMA Short Message Communication
Sub Title (in English)
Keyword(1) Quasi-Zenith Satellite (QZS)
Keyword(2) Quasi-Zenith Satellite System (QZSS)
Keyword(3) spread spectrum (SS)
Keyword(4) code division multiple access (CDMA)
Keyword(5) SS-CDMA
Keyword(6) timing synchronization
Keyword(7) experimental verification
1st Author's Name Kohei AKIMOTO
1st Author's Affiliation Research Institute of Electrical Communication, Tohoku University()
2nd Author's Name Yuji MIYAKE
2nd Author's Affiliation Research Institute of Electrical Communication, Tohoku University
3rd Author's Name Suguru KAMEDA
3rd Author's Affiliation Research Institute of Electrical Communication, Tohoku University
4th Author's Name Akinori TAIRA
4th Author's Affiliation Research Institute of Electrical Communication, Tohoku University
5th Author's Name Noriharu SUEMATSU
5th Author's Affiliation Research Institute of Electrical Communication, Tohoku University
6th Author's Name Tadashi TAKAGI
6th Author's Affiliation Research Institute of Electrical Communication, Tohoku University
7th Author's Name Kazuo TSUBOUCHI
7th Author's Affiliation Research Institute of Electrical Communication, Tohoku University
Date 2015-01-29
Paper # SR2014-96
Volume (vol) vol.114
Number (no) 435
Page pp.pp.-
#Pages 6
Date of Issue