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Paper Abstract and Keywords
Presentation 2008-06-12 13:30
Irreducible Form of AM Criterion for Unconditional ML Estimation of DOA
Haihua Chen, Masakiyo Suzuki (Kitami Inst. of Tech.) SIS2008-7
Abstract (in Japanese) (See Japanese page) 
(in English) This paper addresses the issue of numerical unstability of Alternating Minimization (AM) criterion
in Unconditional Maximum Likelihood (UML) estimation
of Directions-of-Arrival (DOA). First we show the definition of the exact UML estimation and brief description of
the AM method to solve the
exact UML estimation.
The AM algorithm becomes numerical unstable, when more than one direction parameters are going to
have an identical value. It is caused by the fact that the UML criterion with duplicated directions is indefinite.
This paper derives efficient AM (EAM) algorithm by dividing the UML criterion into two components. One depends on a signal
variable parameter and the other does not. Then applying the condition of the uniform linear array of sensors, an irreducible
form of the criterion of EAM algorithm is derived. We call it Irreducible AM (IAM) algorithm. Finally,
simulation results are shown to demonstrate that IAM algorithm is numerical stable and efficient.
Keyword (in Japanese) (See Japanese page) 
(in English) DOA finding / Stochastic signal model / ML / AM / Numerical unstability / Irreducible from / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 85, SIS2008-7, pp. 35-40, June 2008.
Paper # SIS2008-7 
Date of Issue 2008-06-05 (SIS) 
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)
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Conference Information
Committee SIS  
Conference Date 2008-06-12 - 2008-06-13 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SIS 
Conference Code 2008-06-SIS 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Irreducible Form of AM Criterion for Unconditional ML Estimation of DOA 
Sub Title (in English)  
Keyword(1) DOA finding  
Keyword(2) Stochastic signal model  
Keyword(3) ML  
Keyword(4) AM  
Keyword(5) Numerical unstability  
Keyword(6) Irreducible from  
Keyword(7)  
Keyword(8)  
1st Author's Name Haihua Chen  
1st Author's Affiliation Kitami Institute of Technology (Kitami Inst. of Tech.)
2nd Author's Name Masakiyo Suzuki  
2nd Author's Affiliation Kitami Institute of Technology (Kitami Inst. of Tech.)
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Speaker Author-1 
Date Time 2008-06-12 13:30:00 
Presentation Time 25 minutes 
Registration for SIS 
Paper # SIS2008-7 
Volume (vol) vol.108 
Number (no) no.85 
Page pp.35-40 
#Pages 6 
Date of Issue 2008-06-05 (SIS) 

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