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Paper Abstract and Keywords
Presentation 2017-11-09 09:50
A Study on Array Beam Pattern of Multi-User MIMO Basestation Using Null-Space Dimension Expansion -- About Principle of Torelance Improvement against Channel Fluctuation by Orthogonalizing the Past Interference Channels --
Makoto Taromaru, Hironori Ban, Mai Ohta, Daisuke Motegi (Fukuoka Univ.) RCS2017-226
Abstract (in Japanese) (See Japanese page) 
(in English) Some papers reported that a zero-forcing (ZF) adaptive array antenna or multi-user MIMO system at basestations can be robust against channel fluctuation by using null-space dimension expansion. It sets the combining
weights be orthogonal not only to the most recent channels of the interferences but also to the previous paster ones. This report discusses the mechanism to cancel the interferences focusing on the relation between the AoA (angle of arrival) of each the incident wave from the interference terminals and the array beam pattern formed in Rayleigh and Nakagami-Rice fading environment. Theoretical analysis shows that some nulls are formed toward each the AoA of the incident waves of the interference.
Keyword (in Japanese) (See Japanese page) 
(in English) adaptive array antenna / degree of freedom / MIMO / diversity / zero-forcing / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 284, RCS2017-226, pp. 123-127, Nov. 2017.
Paper # RCS2017-226 
Date of Issue 2017-11-01 (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. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF RCS2017-226

Conference Information
Committee AP RCS  
Conference Date 2017-11-08 - 2017-11-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Fukuoka University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Adaptive Antenna, Equalization, Interference Canceler, MIMO, Wireless Communications, etc. 
Paper Information
Registration To RCS 
Conference Code 2017-11-AP-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Array Beam Pattern of Multi-User MIMO Basestation Using Null-Space Dimension Expansion 
Sub Title (in English) About Principle of Torelance Improvement against Channel Fluctuation by Orthogonalizing the Past Interference Channels 
Keyword(1) adaptive array antenna  
Keyword(2) degree of freedom  
Keyword(3) MIMO  
Keyword(4) diversity  
Keyword(5) zero-forcing  
1st Author's Name Makoto Taromaru  
1st Author's Affiliation Fukuoka university (Fukuoka Univ.)
2nd Author's Name Hironori Ban  
2nd Author's Affiliation Fukuoka university (Fukuoka Univ.)
3rd Author's Name Mai Ohta  
3rd Author's Affiliation Fukuoka university (Fukuoka Univ.)
4th Author's Name Daisuke Motegi  
4th Author's Affiliation Fukuoka university (Fukuoka Univ.)
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Date Time 2017-11-09 09:50:00 
Presentation Time 25 
Registration for RCS 
Paper # IEICE-RCS2017-226 
Volume (vol) IEICE-117 
Number (no) no.284 
Page pp.123-127 
#Pages IEICE-5 
Date of Issue IEICE-RCS-2017-11-01 

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