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Paper Abstract and Keywords
Presentation 2024-08-30 13:25
Blind Self-Interference Canceller with Differential Delay for Backscatter Communications
Koichi Nishikawa, Shinsuke Ibi (Doshisha Univ.), Takumi Takahashi (Osaka Univ.), Hisato Iwai (Doshisha Univ.) RCS2024-131
Abstract (in Japanese) (See Japanese page) 
(in English) Backscatter communications are extremely energy-efficient communication scheme, wherein a backscatter device (BD) equipped with passive radio frequency (RF) receives signals transmitted from a communication device (Node A) to a terminal such as a smartphone, and reflects/absorbs the signals for Node A to receive the signal from the BD. However, during this process, Node A receives not only the desired signal, which is the reflected signal from the BD, but also its own transmitted signal with a much higher power level as self-interference (SI). Therefore, similar to in-band full-duplex (IBFD) communications, SI cancellation is essential. One SI cancellation method in IBFD is active SI canceller (ASIC), which creates a replica of the SI signal, and then subtracts it from the received signal. However, the replica generation requires accurate and periodic channel state information (CSI) acquisition, which is inefficient in Internet of Things (IoT) communications, where communication requests occur randomly. To address this issue, differential active SI canceller (DASIC) without requiring prior CSI acquisition of SI has been proposed in the context of Bluetooth low energy (BLE)-based IBFD communications. In this paper, inspired by the above work, we theoretically show that DASIC is effective for SI cancellation in backscatter communications, and then show its validity through computer simulation.
Keyword (in Japanese) (See Japanese page) 
(in English) Backscatter communications / IBFD / self-interference canceller / maximum a-posteriori probability detection / / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 166, RCS2024-131, pp. 84-89, Aug. 2024.
Paper # RCS2024-131 
Date of Issue 2024-08-22 (RCS) 
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 RCS2024-131

Conference Information
Committee SAT RCS  
Conference Date 2024-08-29 - 2024-08-30 
Place (in Japanese) (See Japanese page) 
Place (in English) CUL-PORT(Kochi City) (Temporary) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Satellite Communications, Broadcasting, Forward Error Correction, Wireless Communications, etc. 
Paper Information
Registration To RCS 
Conference Code 2024-08-SAT-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Blind Self-Interference Canceller with Differential Delay for Backscatter Communications 
Sub Title (in English)  
Keyword(1) Backscatter communications  
Keyword(2) IBFD  
Keyword(3) self-interference canceller  
Keyword(4) maximum a-posteriori probability detection  
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1st Author's Name Koichi Nishikawa  
1st Author's Affiliation Doshisha University (Doshisha Univ.)
2nd Author's Name Shinsuke Ibi  
2nd Author's Affiliation Doshisha University (Doshisha Univ.)
3rd Author's Name Takumi Takahashi  
3rd Author's Affiliation Osaka University (Osaka Univ.)
4th Author's Name Hisato Iwai  
4th Author's Affiliation Doshisha University (Doshisha Univ.)
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Speaker Author-1 
Date Time 2024-08-30 13:25:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2024-131 
Volume (vol) vol.124 
Number (no) no.166 
Page pp.84-89 
#Pages 6 
Date of Issue 2024-08-22 (RCS) 

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