Paper Abstract and Keywords |
Presentation |
2015-01-29 13:50
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 (Tohoku Univ.) SR2014-96 |
Abstract |
(in Japanese) |
(See Japanese page) |
(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 erification 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 $ pm $ 20 ns that is the target value of SS-CDMA. |
Keyword |
(in Japanese) |
(See Japanese page) |
(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 / |
Reference Info. |
IEICE Tech. Rep., vol. 114, no. 435, SR2014-96, pp. 13-18, Jan. 2015. |
Paper # |
SR2014-96 |
Date of Issue |
2015-01-22 (SR) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
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SR2014-96 |
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