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Paper Abstract and Keywords
Presentation 2025-07-23 15:40
Analysis of wave propagation estimation
Takashi Iwamoto, Mao Konishi (Mitsubishi Electric) SANE2025-31
Abstract (in Japanese) (See Japanese page) 
(in English) Propagating radio waves are widely used to precisely observe distant objects. A maximum likelihood estimator is often used for those observations that require accuracy, due to its consistency and asymptotic efficiency. In fact, the maximum likelihood estimator of time of flight was analytically derived since early on. Here, we analyze an idealized maximum likelihood estimator of the Doppler frequency shift experienced by propagating waves. The resulting expression provides clear guidelines for the level of accuracy required for a given observation.
Keyword (in Japanese) (See Japanese page) 
(in English) propagating wave / ionosphere / maximum likelihood estimator / consistency / asymptotic efficiency / time of flight / Doppler frequency shift / ionosonde  
Reference Info. IEICE Tech. Rep., vol. 125, no. 126, SANE2025-31, pp. 23-24, July 2025.
Paper # SANE2025-31 
Date of Issue 2025-07-16 (SANE) 
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 SANE2025-31

Conference Information
Committee AP SANE SAT  
Conference Date 2025-07-23 - 2025-07-25 
Place (in Japanese) (See Japanese page) 
Place (in English) hakodate arena 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Remote sensing, Subsurface Electromagnetic Measurements, Sattelite Communication, Antennas and Propagation 
Paper Information
Registration To SANE 
Conference Code 2025-07-AP-SANE-SAT 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Analysis of wave propagation estimation 
Sub Title (in English)  
Keyword(1) propagating wave  
Keyword(2) ionosphere  
Keyword(3) maximum likelihood estimator  
Keyword(4) consistency  
Keyword(5) asymptotic efficiency  
Keyword(6) time of flight  
Keyword(7) Doppler frequency shift  
Keyword(8) ionosonde  
1st Author's Name Takashi Iwamoto  
1st Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric)
2nd Author's Name Mao Konishi  
2nd Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric)
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Speaker Author-1 
Date Time 2025-07-23 15:40:00 
Presentation Time 20 minutes 
Registration for SANE 
Paper # SANE2025-31 
Volume (vol) vol.125 
Number (no) no.126 
Page pp.23-24 
#Pages 2 
Date of Issue 2025-07-16 (SANE) 

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