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Paper Abstract and Keywords
Presentation 2021-11-11 11:45
A recursive solution of joint transmit-receive diversity weight vectors
Fumiyuki Adachi, Ryo Takahashi (Tohoku U.) RCS2021-161
Abstract (in Japanese) (See Japanese page) 
(in English) Optimal joint transmit-receive diversity (JTRD) is a type of multi-input multi-output (MIMO) spatial diversity technique and is designed to maximize the composite channel gain. A set of its transmit and receive diversity weight vectors is a solution of eigenequation or is derived by the singular value decomposition of MIMO. In this paper, instead of solving eigenequations, a new method to obtain JTRD weight vectors by recursive equations is proposed. In general, the number of base station (BS) antennas is much larger than that of user. The proposed recursive method does not require solving large-scale eigenequations and therefore, can be practical. First, recursive equations to be used either BS side or user side are formulated. Also presented is a computationally efficient method for obtaining JTRD weight vector at BS side. Firstly, BS obtains the user side JTRD weight vector (which is much smaller vector size than BS side weight vector) by using recursive equation and then, transforms it to BS side JTRD weight vector. It is confirmed by computer simulation assuming Rayleigh fading MIMO channel that the proposed recursive method can obtain the JTRD weight vectors by only 4 to 5 times weight updating according to the recursive equations and can achieve the channel capacity close to the optimal JTRD.
Keyword (in Japanese) (See Japanese page) 
(in English) Joint transmit-receive diversity / eigenequation / recursive equation / MIMO channel / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 234, RCS2021-161, pp. 98-103, Nov. 2021.
Paper # RCS2021-161 
Date of Issue 2021-11-03 (RCS) 
ISSN 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 RCS2021-161

Conference Information
Committee AP RCS  
Conference Date 2021-11-10 - 2021-11-12 
Place (in Japanese) (See Japanese page) 
Place (in English) NBC-Bekkan (Nagasaki) 
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 2021-11-AP-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A recursive solution of joint transmit-receive diversity weight vectors 
Sub Title (in English)  
Keyword(1) Joint transmit-receive diversity  
Keyword(2) eigenequation  
Keyword(3) recursive equation  
Keyword(4) MIMO channel  
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1st Author's Name Fumiyuki Adachi  
1st Author's Affiliation Tohoku University (Tohoku U.)
2nd Author's Name Ryo Takahashi  
2nd Author's Affiliation Tohoku University (Tohoku U.)
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Speaker Author-1 
Date Time 2021-11-11 11:45:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2021-161 
Volume (vol) vol.121 
Number (no) no.234 
Page pp.98-103 
#Pages 6 
Date of Issue 2021-11-03 (RCS) 

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