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Paper Abstract and Keywords
Presentation 2018-04-23 11:45
A Study on Iterative Channel Estimation with Non-Orthogonal Pilot Sequence in Large MIMO Detection
Takumi Takahashi, Shinsuke Ibi, Seiichi Sampei (Osaka Univ.) RCS2018-6
Abstract (in Japanese) (See Japanese page) 
(in English) Based on the use of iterative channel estimation with non-orthogonal pilot sequence, we proposes a modified covariance matrix on the basis of the imperfection of a temporary criterion in probabilistic data association (PDA) for large multi-user multi-input multi-output (MU-MIMO) detection. To avoid under-determined problems caused by channel estimation using insufficient non-orthogonal pilot sequence, iterative channel estimation is effective, where the temporary criterion based on iterative detection is utilized as an additional pilot sequence. However, the high level bit error ratio (BER) floor is unavoidable due to modeling errors which are caused by decision errors included in the additional pilot sequence in the previous method. For mitigating the negative effects of the modeling errors, a modified covariance matrix is designed. Finally, the validity of using the proposed method for suppressing BER floor level is confirmed by computer simulations.
Keyword (in Japanese) (See Japanese page) 
(in English) iterative channel estimation / iterative detection / non-orthogonal pilot sequence / probabilistic data association / large MIMO / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 12, RCS2018-6, pp. 31-36, April 2018.
Paper # RCS2018-6 
Date of Issue 2018-04-16 (RCS) 
ISSN Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee RCS  
Conference Date 2018-04-23 - 2018-04-24 
Place (in Japanese) (See Japanese page) 
Place (in English) Hotel New Tanaka, Yuda Onsen 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Radio Access Technologies, etc. 
Paper Information
Registration To RCS 
Conference Code 2018-04-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Iterative Channel Estimation with Non-Orthogonal Pilot Sequence in Large MIMO Detection 
Sub Title (in English)  
Keyword(1) iterative channel estimation  
Keyword(2) iterative detection  
Keyword(3) non-orthogonal pilot sequence  
Keyword(4) probabilistic data association  
Keyword(5) large MIMO  
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1st Author's Name Takumi Takahashi  
1st Author's Affiliation Osaka University (Osaka Univ.)
2nd Author's Name Shinsuke Ibi  
2nd Author's Affiliation Osaka University (Osaka Univ.)
3rd Author's Name Seiichi Sampei  
3rd Author's Affiliation Osaka University (Osaka Univ.)
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Speaker Author-2 
Date Time 2018-04-23 11:45:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2018-6 
Volume (vol) vol.118 
Number (no) no.12 
Page pp.31-36 
#Pages
Date of Issue 2018-04-16 (RCS) 


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