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Paper Abstract and Keywords
Presentation 2021-05-21 14:00
[Technology Exhibit] USRP Implementation of Synchronized SS-CDMA Transmission Timing Control Function Using Wi-Wi
Yusaku Honma, Suguru Kameda, Noriharu Suematsu (Tohoku Univ), Satoshi Yasuda, Nobuyasu Shiga (NICT) SR2021-17
Abstract (in Japanese) (See Japanese page) 
(in English) Synchronized spread spectrum code division multiple access (SS-CDMA) is very effective for increasing the capacity and reducing the interference with a rapid spread of Internet of things (IoT) devices. Since the synchronized SS-CDMA requires to receive timing synchronization, it is essential to realize transmission timing control of each node using space-time synchronization. In this paper, we investigate precise time synchronization between nodes using wireless two-way interferometry (Wi-Wi). The measurement results show that the precision of initial timing synchronization of the Wi-Wi module (3σ) is nearly equal to 400 ns. Furthermore, we implement transmission timing control function on Universal Software Radio Peripheral (USRP) synchronized by reference signals of Wi-Wi module. As a result of the measurement evaluation of the implemented system, it is realized that the transmission timing is controlled at the accuracy of the sampling rate of USRP.
Keyword (in Japanese) (See Japanese page) 
(in English) synchronized SS-CDMA / transmission timing control / time synchronization / software defined radio / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 30, SR2021-17, pp. 113-119, May 2021.
Paper # SR2021-17 
Date of Issue 2021-05-13 (SR) 
ISSN Online edition: ISSN 2432-6380
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 SR2021-17

Conference Information
Committee SR  
Conference Date 2021-05-20 - 2021-05-21 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Software Radio, Machine Learning for Wireless Communication, etc. 
Paper Information
Registration To SR 
Conference Code 2021-05-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) USRP Implementation of Synchronized SS-CDMA Transmission Timing Control Function Using Wi-Wi 
Sub Title (in English)  
Keyword(1) synchronized SS-CDMA  
Keyword(2) transmission timing control  
Keyword(3) time synchronization  
Keyword(4) software defined radio  
1st Author's Name Yusaku Honma  
1st Author's Affiliation Tohoku University (Tohoku Univ)
2nd Author's Name Suguru Kameda  
2nd Author's Affiliation Tohoku University (Tohoku Univ)
3rd Author's Name Noriharu Suematsu  
3rd Author's Affiliation Tohoku University (Tohoku Univ)
4th Author's Name Satoshi Yasuda  
4th Author's Affiliation National Institute of Information and Communications Technology (NICT)
5th Author's Name Nobuyasu Shiga  
5th Author's Affiliation National Institute of Information and Communications Technology (NICT)
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Speaker Author-1 
Date Time 2021-05-21 14:00:00 
Presentation Time 120 minutes 
Registration for SR 
Paper # SR2021-17 
Volume (vol) vol.121 
Number (no) no.30 
Page pp.113-119 
Date of Issue 2021-05-13 (SR) 

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