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Paper Abstract and Keywords
Presentation 2017-01-20 10:00
Circular QAM Constellations with Robustness for Time-Varying Phase Noise
Bin Zheng, Lianjun Deng, Mamoru Sawahashi (Tokyo City Univ.), Norifumi Kamiya (NEC) IT2016-82 SIP2016-120 RCS2016-272
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes Circular Quadrature Amplitude Modulation (QAM) constellation which achieves almost identical bit error rate (BER) performance level to that of Rectangular QAM in additive white Gaussian noise (AWGN) channel, while it achieves better BER performance compared to Rectangular QAM in the AWGN channel with time-varying phase noise. Computer simulation results show when using partial Low-Density Parity-Check (LDPC) code associated with collaborative decoding, the proposed Circular 1024QAM constellation improves the required received signal-to-noise power ratio (SNR) at the BER of 10-6 by approximately 0.2 – 0.5 dB compared to Rectangular 1024QAM in the AWGN channel with time-varying phase noise.
Keyword (in Japanese) (See Japanese page) 
(in English) QAM / circular constellation / partial LDPC coding / double Gray mapping / phase noise / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 396, RCS2016-272, pp. 211-216, Jan. 2017.
Paper # RCS2016-272 
Date of Issue 2017-01-12 (IT, SIP, RCS) 
ISSN Print edition: ISSN 0913-5685    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 IT2016-82 SIP2016-120 RCS2016-272

Conference Information
Committee IT SIP RCS  
Conference Date 2017-01-19 - 2017-01-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Osaka City Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Signal Processing for Wireless Communications, Learning, Mathematical Science, Communication Theory, etc. 
Paper Information
Registration To RCS 
Conference Code 2017-01-IT-SIP-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Circular QAM Constellations with Robustness for Time-Varying Phase Noise 
Sub Title (in English)  
Keyword(1) QAM  
Keyword(2) circular constellation  
Keyword(3) partial LDPC coding  
Keyword(4) double Gray mapping  
Keyword(5) phase noise  
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1st Author's Name Bin Zheng  
1st Author's Affiliation Tokyo City University (Tokyo City Univ.)
2nd Author's Name Lianjun Deng  
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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Speaker Author-1 
Date Time 2017-01-20 10:00:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # IT2016-82, SIP2016-120, RCS2016-272 
Volume (vol) vol.116 
Number (no) no.394(IT), no.395(SIP), no.396(RCS) 
Page pp.211-216 
#Pages 6 
Date of Issue 2017-01-12 (IT, SIP, RCS) 

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