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Paper Abstract and Keywords
Presentation 2009-12-08 10:50
Composition of Blind Type Adaptive Filter Based on Signal Subspace for DS/CDMA Systems with Antenna Array
Tomokazu Takahashi (Hosei Univ.), Tsuyoshi Ichikawa (Tokyo Metro. Police Info-Com. Dep.), Kohei Otake (Hosei Univ.) WBS2009-36
Abstract (in Japanese) (See Japanese page) 
(in English) In DS/CDMA communication systems, to improve the transmission efficiency, a blind or non-pilot-aided adaptive MMSE receiver based on the signal subspace has been proposed. The blind type receiver, however, has a problem of a severe deterioration of the BER characteristics due to low channel estimation accuracy, compared with the pilot-aided type. In order to combat this problem, we propose such on adaptive filter that the component in the orthogonal complement of the signal subspace are filtered out by using the so-called projection method, and thus both the decrease in processing dimension and improvement in BER performance are achieved. In this paper, we also conduct comparative simulations between the proposed filter and the reduced-rank filter which was proposed by us to deal with the same problem, and the effectiveness of the proposed filter is shown in terms of BER characteristics.
Keyword (in Japanese) (See Japanese page) 
(in English) DS/CDMA / signal subspace / blind / projection method / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 324, WBS2009-36, pp. 1-6, Dec. 2009.
Paper # WBS2009-36 
Date of Issue 2009-12-01 (WBS) 
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)
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Conference Information
Committee ITS WBS  
Conference Date 2009-12-08 - 2009-12-09 
Place (in Japanese) (See Japanese page) 
Place (in English) Kumamoto University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To WBS 
Conference Code 2009-12-ITS-WBS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Composition of Blind Type Adaptive Filter Based on Signal Subspace for DS/CDMA Systems with Antenna Array 
Sub Title (in English)  
Keyword(1) DS/CDMA  
Keyword(2) signal subspace  
Keyword(3) blind  
Keyword(4) projection method  
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1st Author's Name Tomokazu Takahashi  
1st Author's Affiliation Hosei University (Hosei Univ.)
2nd Author's Name Tsuyoshi Ichikawa  
2nd Author's Affiliation Tokyo Metropolitan Police Info-Communications Department (Tokyo Metro. Police Info-Com. Dep.)
3rd Author's Name Kohei Otake  
3rd Author's Affiliation Hosei University (Hosei Univ.)
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Speaker Author-1 
Date Time 2009-12-08 10:50:00 
Presentation Time 25 minutes 
Registration for WBS 
Paper # WBS2009-36 
Volume (vol) vol.109 
Number (no) no.324 
Page pp.1-6 
#Pages 6 
Date of Issue 2009-12-01 (WBS) 

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