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| Presentation | 2017-05-26 10:00 [Technology Exhibit] Experimental Evaluation for QZSS Short Message SS-CDMA Communication -- Construction of Transmission Timing Control System with FPGA -- Rei Kawai, Hiroshi Oguma (NIT, Toyama College), Kei Ohya, Suguru Kameda, Noriharu Suematsu (Tohoku Univ.)  SR2017-15 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | We have proposed Spread Spectrum Code Division Multiple Access (SS-CDMA) short message communication using Quasi-Zenith Satellite System (QZSS) for safety confirmation system at the time of large disaster. The proposed system controls the transmission timing using highly accurate time and position information obtained from the QZSS. In order to realize the proposed system, we evaluate the time synchronization accuracy. As a prototype, when a time synchronization system with Network Time Protocol (NTP) server is constructed, it has a timing synchronization error of 1.07 μs. Since the target time synchronization accuracy of the prototype with NTP is not satisfied because of software delay, we design and implement a transmission timing control system that performs hardware processing without software delay using Field Programmable Gate Array (FPGA) in this work. As a result of evaluating the time synchronization accuracy, when the delay time for the transmission timing control is 330 ns, an error within 8 ns occur in the implemented system. Also, it is found that there is a proportional relationship between the delay time and the terminal time deviation. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | satellite communication / QZSS / GPS / SS-CDMA / FPGA / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 117, no. 56, SR2017-15, pp. 89-95, May 2017. | |
| Paper # | SR2017-15 | |
| Date of Issue | 2017-05-18 (SR) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | SR2017-15 |
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| Conference Information | |
| Committee | SR |
| Conference Date | 2017-05-25 - 2017-05-26 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tokyo big sight |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Technical Exhibition, etc. |
| Paper Information | |
| Registration To | SR |
| Conference Code | 2017-05-SR |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Experimental Evaluation for QZSS Short Message SS-CDMA Communication |
| Sub Title (in English) | Construction of Transmission Timing Control System with FPGA |
| Keyword(1) | satellite communication |
| Keyword(2) | QZSS |
| Keyword(3) | GPS |
| Keyword(4) | SS-CDMA |
| Keyword(5) | FPGA |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Rei Kawai |
| 1st Author's Affiliation | NIT, Toyama College (NIT, Toyama College) |
| 2nd Author's Name | Hiroshi Oguma |
| 2nd Author's Affiliation | NIT, Toyama College (NIT, Toyama College) |
| 3rd Author's Name | Kei Ohya |
| 3rd Author's Affiliation | Tohoku University (Tohoku Univ.) |
| 4th Author's Name | Suguru Kameda |
| 4th Author's Affiliation | Tohoku University (Tohoku Univ.) |
| 5th Author's Name | Noriharu Suematsu |
| 5th Author's Affiliation | Tohoku University (Tohoku Univ.) |
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| Speaker | Author-1 |
| Date Time | 2017-05-26 10:00:00 |
| Presentation Time | 420 minutes |
| Registration for | SR |
| Paper # | SR2017-15 |
| Volume (vol) | vol.117 |
| Number (no) | no.56 |
| Page | pp.89-95 |
| #Pages | 7 |
| Date of Issue | 2017-05-18 (SR) |
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