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Paper Abstract and Keywords
Presentation 2014-03-05 14:00
A Pilot Contamination Averse Closed-Loop Scheme for TDD-Based Massive MIMO Systems
Oussama Souihli, Yasuyuki Hatakawa, Satoshi Konishi (KDDI R&D Labs) RCS2013-384
Abstract (in Japanese) (See Japanese page) 
(in English) TDD-based Massive MIMO systems rely on channel reciprocity assumption (i.e. that the downlink channel matrix can be inferred from the uplink channel matrix), so that it suffices that the receivers send pilots in the uplink to the BS for the latter to determine the uplink channel matrix and subsequently the downlink channel matrix. However, since there are many UEs in Massive MIMO and the number of mutually-orthogonal pilot sequences is limited, some pilot sequences must be reused. This pilot reuse degrades uplink channel estimation in what is commonly known as the "pilot contamination" or "pilot pollution" problem. In this work, we provide a blind uplink channel estimation approach combined with a carefully defined transmit precoding, such that full-CSI-like performance is achieved. Because the proposed channel estimation is blind, there is no pilot contamination because there are no pilots in the first place.
Keyword (in Japanese) (See Japanese page) 
(in English) Massive MIMO / Channel Estimation / QR Decomposition / Tomlinson-Harashima Precoding / Closed-Loop MIMO / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 456, RCS2013-384, pp. 469-474, March 2014.
Paper # RCS2013-384 
Date of Issue 2014-02-24 (RCS) 
ISSN Print edition: ISSN 0913-5685    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)
Download PDF RCS2013-384

Conference Information
Committee RCS SR SRW  
Conference Date 2014-03-03 - 2014-03-05 
Place (in Japanese) (See Japanese page) 
Place (in English) Waseda Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To RCS 
Conference Code 2014-03-RCS-SR-SRW 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Pilot Contamination Averse Closed-Loop Scheme for TDD-Based Massive MIMO Systems 
Sub Title (in English)  
Keyword(1) Massive MIMO  
Keyword(2) Channel Estimation  
Keyword(3) QR Decomposition  
Keyword(4) Tomlinson-Harashima Precoding  
Keyword(5) Closed-Loop MIMO  
Keyword(6)  
Keyword(7)  
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1st Author's Name Oussama Souihli  
1st Author's Affiliation KDDI R&D Laboratories, Inc. (KDDI R&D Labs)
2nd Author's Name Yasuyuki Hatakawa  
2nd Author's Affiliation KDDI R&D Laboratories, Inc. (KDDI R&D Labs)
3rd Author's Name Satoshi Konishi  
3rd Author's Affiliation KDDI R&D Laboratories, Inc. (KDDI R&D Labs)
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Speaker Author-1 
Date Time 2014-03-05 14:00:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2013-384 
Volume (vol) vol.113 
Number (no) no.456 
Page pp.469-474 
#Pages
Date of Issue 2014-02-24 (RCS) 


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