Experimental Evaluation of Synchronized SS-CDMA Transmission Timing Control Method for QZSS Short Message Communication

Suguru KAMEDA; Kei OHYA; Hiroshi OGUMA; Noriharu SUEMATSU

doi:10.1587/transcom.2018EBP3166

Experimental Evaluation of Synchronized SS-CDMA Transmission Timing Control Method for QZSS Short Message Communication

Suguru KAMEDA, Kei OHYA, Hiroshi OGUMA, Noriharu SUEMATSU

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Summary :

We have already proposed synchronized spread spectrum code division multiple access (SS-CDMA) for the Quasi-Zenith Satellite System (QZSS) safety confirmation system to be used in times of great disaster. In this system, the satellite reception timings of all uplink signals are synchronized using a transmission timing control method in order to realize high-density user multiple access. An issue that should be addressed in order for this system to be viable is the error that can occur in the satellite reception timing. This error occurs due to the terminal time deviation and the error in calculating the propagation delay to the satellite. In this paper, we measure the terminal time deviation and the propagation delay calculation error at the same time by using the same receivers and evaluate the satellite reception timing error of the uplink signal. By this measurement, it is shown that satellite reception timing error within 50ns can be realized in 99.98% of mobile terminals. This shows that the synchronized SS-CDMA with the transmission timing control method has a potential to realize the QZSS short message system with high-density user multiple access.

Publication: IEICE TRANSACTIONS on Communications Vol.E102-B No.8 pp.1781-1790

Publication Date: 2019/08/01

Publicized: 2019/01/25

Online ISSN: 1745-1345

DOI: 10.1587/transcom.2018EBP3166

Type of Manuscript: PAPER

Category: Satellite Communications

Authors

Suguru KAMEDA
  the Tohoku University
Kei OHYA
  the Tohoku University
Hiroshi OGUMA
  Toyama College
Noriharu SUEMATSU
  the Tohoku University

Keyword

SS-CDMA, QZSS, GPS, timing synchronization, satellite communication

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Suguru KAMEDA, Kei OHYA, Hiroshi OGUMA, Noriharu SUEMATSU, "Experimental Evaluation of Synchronized SS-CDMA Transmission Timing Control Method for QZSS Short Message Communication" in IEICE TRANSACTIONS on Communications, vol. E102-B, no. 8, pp. 1781-1790, August 2019, doi: 10.1587/transcom.2018EBP3166.
Abstract: We have already proposed synchronized spread spectrum code division multiple access (SS-CDMA) for the Quasi-Zenith Satellite System (QZSS) safety confirmation system to be used in times of great disaster. In this system, the satellite reception timings of all uplink signals are synchronized using a transmission timing control method in order to realize high-density user multiple access. An issue that should be addressed in order for this system to be viable is the error that can occur in the satellite reception timing. This error occurs due to the terminal time deviation and the error in calculating the propagation delay to the satellite. In this paper, we measure the terminal time deviation and the propagation delay calculation error at the same time by using the same receivers and evaluate the satellite reception timing error of the uplink signal. By this measurement, it is shown that satellite reception timing error within 50ns can be realized in 99.98% of mobile terminals. This shows that the synchronized SS-CDMA with the transmission timing control method has a potential to realize the QZSS short message system with high-density user multiple access.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2018EBP3166/_p

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@ARTICLE{e102-b_8_1781,
author={Suguru KAMEDA, Kei OHYA, Hiroshi OGUMA, Noriharu SUEMATSU, },
journal={IEICE TRANSACTIONS on Communications},
title={Experimental Evaluation of Synchronized SS-CDMA Transmission Timing Control Method for QZSS Short Message Communication},
year={2019},
volume={E102-B},
number={8},
pages={1781-1790},
abstract={We have already proposed synchronized spread spectrum code division multiple access (SS-CDMA) for the Quasi-Zenith Satellite System (QZSS) safety confirmation system to be used in times of great disaster. In this system, the satellite reception timings of all uplink signals are synchronized using a transmission timing control method in order to realize high-density user multiple access. An issue that should be addressed in order for this system to be viable is the error that can occur in the satellite reception timing. This error occurs due to the terminal time deviation and the error in calculating the propagation delay to the satellite. In this paper, we measure the terminal time deviation and the propagation delay calculation error at the same time by using the same receivers and evaluate the satellite reception timing error of the uplink signal. By this measurement, it is shown that satellite reception timing error within 50ns can be realized in 99.98% of mobile terminals. This shows that the synchronized SS-CDMA with the transmission timing control method has a potential to realize the QZSS short message system with high-density user multiple access.},
keywords={},
doi={10.1587/transcom.2018EBP3166},
ISSN={1745-1345},
month={August},}

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TY - JOUR
TI - Experimental Evaluation of Synchronized SS-CDMA Transmission Timing Control Method for QZSS Short Message Communication
T2 - IEICE TRANSACTIONS on Communications
SP - 1781
EP - 1790
AU - Suguru KAMEDA
AU - Kei OHYA
AU - Hiroshi OGUMA
AU - Noriharu SUEMATSU
PY - 2019
DO - 10.1587/transcom.2018EBP3166
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E102-B
IS - 8
JA - IEICE TRANSACTIONS on Communications
Y1 - August 2019
AB - We have already proposed synchronized spread spectrum code division multiple access (SS-CDMA) for the Quasi-Zenith Satellite System (QZSS) safety confirmation system to be used in times of great disaster. In this system, the satellite reception timings of all uplink signals are synchronized using a transmission timing control method in order to realize high-density user multiple access. An issue that should be addressed in order for this system to be viable is the error that can occur in the satellite reception timing. This error occurs due to the terminal time deviation and the error in calculating the propagation delay to the satellite. In this paper, we measure the terminal time deviation and the propagation delay calculation error at the same time by using the same receivers and evaluate the satellite reception timing error of the uplink signal. By this measurement, it is shown that satellite reception timing error within 50ns can be realized in 99.98% of mobile terminals. This shows that the synchronized SS-CDMA with the transmission timing control method has a potential to realize the QZSS short message system with high-density user multiple access.
ER -