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Paper Abstract and Keywords
Presentation 2024-11-04 13:45
[Poster Presentation] USRP Implementation of Synchronized SS-CDMA Communication Function Using Wi-Wi: Impact of Timing Offset in a Broadband Condition
Toshiki Ouchi, Serena Akasaka, Masataka Miyake, Suguru Kameda (Hiroshima Univ.) SR2024-49
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 the rapid spread of Internet of things (IoT) devices. Since the synchronized SS-CDMA requires timing synchronization for receiving, it is essential to realize space-time synchronization. The wireless two-way interferometry (Wi-Wi) is used for precise time synchronization between nodes. By transmitting a bundled signal of 100 channels in total from two Universal Software Radio Peripherals (USRPs) using transmission timing control, we have constructed a virtual 100-terminal simultaneous connection environment for synchronized SS-CDMA on the uplink and evaluated the environment by the measurement. In this paper, as an investigation of impact of timing offset between nodes in a broadband condition, the chip rate was varied up to 100Mchip／s, and the bit error rate (BER) characteristics were measured and evaluated. As a result, we found that the rate of BER degradation was more pronounced at higher chip rates when the offset was increased from 3 ns to 20 ns.
Keyword (in Japanese) (See Japanese page) 
(in English) synchronized SS-CDMA / transmission timing control / space-time synchronization / / / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 233, SR2024-49, pp. 7-8, Nov. 2024.
Paper # SR2024-49 
Date of Issue 2024-10-28 (SR) 
ISSN 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 SR2024-49

Conference Information
Committee SR  
Conference Date 2024-11-04 - 2024-11-07 
Place (in Japanese) (See Japanese page) 
Place (in English) Fraunhofer IPT 
Topics (in Japanese) (See Japanese page) 
Topics (in English) SmartCom2024 
Paper Information
Registration To SR 
Conference Code 2024-11-SR 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) USRP Implementation of Synchronized SS-CDMA Communication Function Using Wi-Wi: Impact of Timing Offset in a Broadband Condition 
Sub Title (in English)  
Keyword(1) synchronized SS-CDMA  
Keyword(2) transmission timing control  
Keyword(3) space-time synchronization  
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1st Author's Name Toshiki Ouchi  
1st Author's Affiliation Hiroshima University (Hiroshima Univ.)
2nd Author's Name Serena Akasaka  
2nd Author's Affiliation Hiroshima University (Hiroshima Univ.)
3rd Author's Name Masataka Miyake  
3rd Author's Affiliation Hiroshima University (Hiroshima Univ.)
4th Author's Name Suguru Kameda  
4th Author's Affiliation Hiroshima University (Hiroshima Univ.)
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Speaker Author-1 
Date Time 2024-11-04 13:45:00 
Presentation Time 60 minutes 
Registration for SR 
Paper # SR2024-49 
Volume (vol) vol.124 
Number (no) no.233 
Page pp.7-8 
#Pages 2 
Date of Issue 2024-10-28 (SR) 

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