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Paper Abstract and Keywords
Presentation 2017-08-18 15:45
[Encouragement Talk] Performance improvement of Set-Partitioning 64APSK coded modulation optimizing signal constellation points
Yuki Koizumi, Yoichi Suzuki, Masaaki Kojima, Hisashi Sujikai, Shoji Tanaka (NHK) SAT2017-36
Abstract (in Japanese) (See Japanese page) 
(in English) We are engaged in researching set-partitioning multi-level coded modulation for the purpose of increasing the capacity of satellite transmission. We have previously designed a 64APSK coded modulation whose number of circles allocating constellation points was restricted to four and confirmed that it can achieve better transmission performance than the gray mapped 64QAM. In order to perform more efficient transmission with high channel capacity, the flexible constellation design without restricting not only the number of circumferences but also circumference arrangement is worth considering. In this report, we first discuss the design results when the number of circles is set as the design parameters. We then propose a design method that constellation points are not arranged circumferentially but at arbitrary coordinates in the IQ plane. We indicate that the proposed method can increase channel capacity compared to the previous design method with circumference arrangement. Finally, bit allocation and optimization of LDPC coding rate distribution are performed for the constellation designed with the proposed method , and the transmission performance under the AWGN is evaluated by computer simulation.
Keyword (in Japanese) (See Japanese page) 
(in English) 64APSK / Coded modulation, / Set-partitioning / Channel capacity / Constellation / LDPC code / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 174, SAT2017-36, pp. 81-85, Aug. 2017.
Paper # SAT2017-36 
Date of Issue 2017-08-10 (SAT) 
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 SAT2017-36

Conference Information
Committee RCS SAT  
Conference Date 2017-08-17 - 2017-08-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Niigata Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Satellite Communications, Broadcasting, Error Correction, Wireless Communication Systems, etc. 
Paper Information
Registration To SAT 
Conference Code 2017-08-RCS-SAT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Performance improvement of Set-Partitioning 64APSK coded modulation optimizing signal constellation points 
Sub Title (in English)  
Keyword(1) 64APSK  
Keyword(2) Coded modulation,  
Keyword(3) Set-partitioning  
Keyword(4) Channel capacity  
Keyword(5) Constellation  
Keyword(6) LDPC code  
1st Author's Name Yuki Koizumi  
1st Author's Affiliation NHK (NHK)
2nd Author's Name Yoichi Suzuki  
2nd Author's Affiliation NHK (NHK)
3rd Author's Name Masaaki Kojima  
3rd Author's Affiliation NHK (NHK)
4th Author's Name Hisashi Sujikai  
4th Author's Affiliation NHK (NHK)
5th Author's Name Shoji Tanaka  
5th Author's Affiliation NHK (NHK)
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Date Time 2017-08-18 15:45:00 
Presentation Time 25 
Registration for SAT 
Paper # IEICE-SAT2017-36 
Volume (vol) IEICE-117 
Number (no) no.174 
Page pp.81-85 
#Pages IEICE-5 
Date of Issue IEICE-SAT-2017-08-10 

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