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Paper Abstract and Keywords
Presentation 2016-10-20 10:10
Performance of Circular QAM Constellations Using Partial Channel Coding with Parallel Double Gray Mapping
Lianjun Deng, Bin Zheng, Mamoru Sawahashi (Tokyo City Univ.), Norifumi Kamiya (NEC) RCS2016-161
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes parallel double Gray mapping scheme which is suitable for circular quadrature amplitude modulation (QAM) constellations using partial channel coding associated with collaborative decoding. By using the parallel double Gray mapping scheme, we compare the bit error rate (BER) performance of circular 1024QAM and 2048QAM schemes with rectangular 1024QAM and cross 2048QAM schemes, respectively. Computer simulation shows that the required received signal-to-noise power ratio (SNR) at the BER of 10-5 of the collaborative decoding is decreased by approximately 6.5 dB compared to that of the independent decoding for partial turbo coding employing the parallel double Gray mapping. We also show that circular 1024QAM exhibits higher robustness for time-varying phase noise compared to rectangular 1024QAM. We show however that rectangular 1024QAM provides the slightly better BER performance level compared to circular 1024QAM when using partial turbo coding employing the parallel double Gray mapping under additive white Gaussian noise (AWGN) channel with time-varying phase noise.
Keyword (in Japanese) (See Japanese page) 
(in English) QAM / Circular QAM / partial channel coding / double Gray mapping / phase noise / Rectangular QAM / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 257, RCS2016-161, pp. 47-52, Oct. 2016.
Paper # RCS2016-161 
Date of Issue 2016-10-13 (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 RCS2016-161

Conference Information
Committee RCS  
Conference Date 2016-10-20 - 2016-10-21 
Place (in Japanese) (See Japanese page) 
Place (in English) YRP (Yokosuka) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless Communication Schemes, Wireless Communication Systems, Wireless Standards, Future Wireless Systems, etc. 
Paper Information
Registration To RCS 
Conference Code 2016-10-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Performance of Circular QAM Constellations Using Partial Channel Coding with Parallel Double Gray Mapping 
Sub Title (in English)  
Keyword(1) QAM  
Keyword(2) Circular QAM  
Keyword(3) partial channel coding  
Keyword(4) double Gray mapping  
Keyword(5) phase noise  
Keyword(6) Rectangular QAM  
1st Author's Name Lianjun Deng  
1st Author's Affiliation Tokyo City University (Tokyo City Univ.)
2nd Author's Name Bin Zheng  
2nd Author's Affiliation Tokyo City University (Tokyo City Univ.)
3rd Author's Name Mamoru Sawahashi  
3rd Author's Affiliation Tokyo City University (Tokyo City Univ.)
4th Author's Name Norifumi Kamiya  
4th Author's Affiliation NEC Corporation (NEC)
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Date Time 2016-10-20 10:10:00 
Presentation Time 25 
Registration for RCS 
Paper # IEICE-RCS2016-161 
Volume (vol) IEICE-116 
Number (no) no.257 
Page pp.47-52 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2016-10-13 

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