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Paper Abstract and Keywords
Presentation 2020-06-25 13:00
A Study on DLDC-Aided Joint Signal Processing for Unified Optical and Wireless Channels
Yoshikatsu Wakabayashi, Shinsuke Ibi (Doshisha Univ.), Takumi Takahashi (Osaka Univ.), Hisato Iwai (Doshisha Univ.) RCS2020-35
Abstract (in Japanese) (See Japanese page) 
(in English) One of the solutions for utilizing the high-frequency band is to deploy multiple distributed units (DU) 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 a multiple-input multiple-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 detection after unifying the wireless space and the optical space as one MIMO channel. In order to realize this idea, we propose a method of demodulating in CU using DLDC (Differential Linear Dispersion Code) and confirm its effectiveness.
Keyword (in Japanese) (See Japanese page) 
(in English) Optical-wireless channel / MIMO / PDM / DLDC / OFDM / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 74, RCS2020-35, pp. 73-77, June 2020.
Paper # RCS2020-35 
Date of Issue 2020-06-17 (RCS) 
ISSN Print edition: ISSN 0913-5685  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 RCS2020-35

Conference Information
Committee RCS  
Conference Date 2020-06-24 - 2020-06-26 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) First Presentation in IEICE Technical Committee, Resource Control, Scheduling, Wireless Communications, etc. 
Paper Information
Registration To RCS 
Conference Code 2020-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on DLDC-Aided Joint Signal Processing for 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) OFDM  
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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Date Time 2020-06-25 13:00:00 
Presentation Time 25 
Registration for RCS 
Paper # IEICE-RCS2020-35 
Volume (vol) IEICE-120 
Number (no) no.74 
Page pp.73-77 
#Pages IEICE-5 
Date of Issue IEICE-RCS-2020-06-17 

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