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Paper Abstract and Keywords
Presentation 2022-01-20 14:05
A Study on Extended DLDC-Aided Joint Signal Processing in Unified Optical and Wireless Channels
Yoshikatsu Wakabayashi, Shinsuke Ibi (Doshisha Univ.), Takumi Takahashi (Osaka Univ.), Hisato Iwai (Doshisha Univ.) IT2021-42 SIP2021-50 RCS2021-210
Abstract (in Japanese) (See Japanese page) 
(in English) One of the solutions for utilizing the high-frequency band is to deploy multiple distributed units (DUs) under a central unit (CU) in cloud radio access network (C-RAN) architecture. In the case of the uplink from the terminal to the CU, wireless links are established between the mobile terminal and DU. On the other hand, optical fibers are connected between the DU and CU. In the sense of end-to-end points, the link between terminals and CU is a kind of relay communication. When PDM (Polarization Division Multiplexing) communication is used for optical communications, it is possible to construct multi-input multi-output (MIMO) channels in the fiber. In this configuration, both DU and CU need to detect MIMO signals, which causes severe signal processing delay. In this paper, to improve the responsiveness, it is assumed that the DU does not detect the signal but simply transfers, and only the CU detects the signal. At this time, it is effective to perform blind signal separation (BSS) after unifying the wireless space and the optical space as one MIMO channel. We have previously proposed a method for demodulating in a CU using differential linear dispersion code (DLDC) to realize the BSS. However, there was a problem of performance degradation due to residual interference caused by the block diagonal approximation of the unified channel matrix. In order to deal with this problem in this paper, we propose a scheme using an extended DLDC with an extended size of the dispersion matrix by exploiting the pair-wise error probability (PEP).
Keyword (in Japanese) (See Japanese page) 
(in English) Optical-wireless channel / MIMO / PDM / DLDC / PEP / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 329, RCS2021-210, pp. 81-86, Jan. 2022.
Paper # RCS2021-210 
Date of Issue 2022-01-13 (IT, SIP, 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 IT2021-42 SIP2021-50 RCS2021-210

Conference Information
Committee RCS SIP IT  
Conference Date 2022-01-20 - 2022-01-21 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To RCS 
Conference Code 2022-01-RCS-SIP-IT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Extended DLDC-Aided Joint Signal Processing in Unified Optical and Wireless Channels 
Sub Title (in English)  
Keyword(1) Optical-wireless channel  
Keyword(2) MIMO  
Keyword(3) PDM  
Keyword(4) DLDC  
Keyword(5) PEP  
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Keyword(8)  
1st Author's Name Yoshikatsu Wakabayashi  
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 2022-01-20 14:05:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # IT2021-42, SIP2021-50, RCS2021-210 
Volume (vol) vol.121 
Number (no) no.327(IT), no.328(SIP), no.329(RCS) 
Page pp.81-86 
#Pages
Date of Issue 2022-01-13 (IT, SIP, RCS) 


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