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Paper Abstract and Keywords
Presentation 2018-03-13 15:55
A Channel State Information Feedback Scheme for Multi-user MIMO using Guard Band Frequency Response extrapolated by Adaptive Filter
Futoshi Fukuda, Fumio Takahata (Waseda Univ.) CAS2017-159 CS2017-113
Abstract (in Japanese) (See Japanese page) 
(in English) Several compression schemes of channel state information (CSI) for the downlink multi-user MIMO are proposed, in which at the receive side, the CSI’s in the frequency domain are converted to delay profiles in the time domain and time components with high power in the delay profiles are selected and only these components are fed back to the transmit side . In these schemes, buffer bands in the frequency domain are prepared to combine multiple CSI’s and the interpolation method using iterative processing based on the convex projection is adopted to produce the delay profiles expressing propagation paths precisely. A linear interpolation method and a CSI copy method are proposed as the shape of the buffer bands in the frequency domain, and it is reported that the suitable length of the buffer bands depend on fading conditions. Considering that the shape of the buffer bands is one of key points to realize an accurate compression of CSI’s, the paper proposes the interpolation method utilizing guard bands with frequency response extrapolated by adaptive filter as the buffer bands independent on fading conditions, and shows as the results of the computer simulation that the transmission characteristics of the proposed scheme outperform the characteristics of the conventional methods.
Keyword (in Japanese) (See Japanese page) 
(in English) Multi-user MIMO / CSI feedback / Guard band / Adaptive filter / / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 504, CS2017-113, pp. 145-150, March 2018.
Paper # CS2017-113 
Date of Issue 2018-03-05 (CAS, CS) 
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 CAS2017-159 CS2017-113

Conference Information
Committee CS CAS  
Conference Date 2018-03-12 - 2018-03-13 
Place (in Japanese) (See Japanese page) 
Place (in English) Nishijin Plaza, Kyushu University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Network processor, Signal processing and circuits for communications, Wireless LAN / PAN, etc. 
Paper Information
Registration To CS 
Conference Code 2018-03-CS-CAS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Channel State Information Feedback Scheme for Multi-user MIMO using Guard Band Frequency Response extrapolated by Adaptive Filter 
Sub Title (in English)  
Keyword(1) Multi-user MIMO  
Keyword(2) CSI feedback  
Keyword(3) Guard band  
Keyword(4) Adaptive filter  
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1st Author's Name Futoshi Fukuda  
1st Author's Affiliation Waseda University (Waseda Univ.)
2nd Author's Name Fumio Takahata  
2nd Author's Affiliation Waseda University (Waseda Univ.)
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Speaker Author-1 
Date Time 2018-03-13 15:55:00 
Presentation Time 25 minutes 
Registration for CS 
Paper # CAS2017-159, CS2017-113 
Volume (vol) vol.117 
Number (no) no.503(CAS), no.504(CS) 
Page pp.145-150 
#Pages 6 
Date of Issue 2018-03-05 (CAS, CS) 

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