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Paper Abstract and Keywords
Presentation 2019-10-24 11:50
A Study on Interference Mitigation Considering Pilot Overhead in TDD Massive MIMO Heterogeneous Networks
Shunsuke Kamiwatari, Osamu Muta (Kyushu Univ.) RCS2019-183
Abstract (in Japanese) (See Japanese page) 
(in English) In a two-tier heterogeneous network (HetNet) , mitigation of interference between the MC and SC (i.e., cross-tier interference) is an important issue, where macro cell (MC) and small cell (SC) use the same time/frequency resources. The authors have proposed to estimate cross-channel state information between macro base station (MBS) and small cell users (SUs) by using uplink pilots and optimizing the precoding weights at MBS so as to mitigate interference from MBS to SU. However, in the above work, cross-tier interference mitigation from small-cell base station (SBS) to macro users (MUs) is not taken into consideration. In this paper, we propose a cross-tier interference mitigation scheme that coordinates not only cross-tier interference from MBS to SU but also that from SBS to MU in time division duplex (TDD) based two-tier HetNet where massive multi-input multi-output (mMIMO) is equipped at MBS. In this scheme, cross-tier interference can be mitigated without increasing the pilot overhead in comparison with the conventional scheme. Simulation results show that the proposed scheme is effective in improving downlink sum-rate.
Keyword (in Japanese) (See Japanese page) 
(in English) two-tier heterogeneous network / massive MIMO / orthogonal pilot / pilot overhead / / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 244, RCS2019-183, pp. 31-36, Oct. 2019.
Paper # RCS2019-183 
Date of Issue 2019-10-17 (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 RCS2019-183

Conference Information
Committee RCS  
Conference Date 2019-10-24 - 2019-10-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Yokosuka Research Park 
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 2019-10-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Interference Mitigation Considering Pilot Overhead in TDD Massive MIMO Heterogeneous Networks 
Sub Title (in English)  
Keyword(1) two-tier heterogeneous network  
Keyword(2) massive MIMO  
Keyword(3) orthogonal pilot  
Keyword(4) pilot overhead  
1st Author's Name Shunsuke Kamiwatari  
1st Author's Affiliation Kyushu University (Kyushu Univ.)
2nd Author's Name Osamu Muta  
2nd Author's Affiliation Kyushu University (Kyushu Univ.)
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Date Time 2019-10-24 11:50:00 
Presentation Time 25 
Registration for RCS 
Paper # IEICE-RCS2019-183 
Volume (vol) IEICE-119 
Number (no) no.244 
Page pp.31-36 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2019-10-17 

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