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Paper Abstract and Keywords
Presentation 2021-10-08 13:30
Positioning Accuracy Improvement Effect Based on Multiple Observations of Doppler shift for User Position Detection System Using Unmanned Aerial Vehicles
Hiroyasu Ishikawa (Nihon Univ.), Hideyuki Shinonaga (Toyo Univ.) SAT2021-50
Abstract (in Japanese) (See Japanese page) 
(in English) Several unmanned aerial vehicles (UAVs), traveling at a velocity of 40–100 km/h and with an altitude of 150–1,000 m, are used to cover a wide service are in typical unmanned aircraft systems. Therefore, Doppler shifts occur at the carrier frequencies of transmitted and received signals due to the change in the line-of-sight velocity between the UAV and the terrestrial terminal. By observing multiple Doppler shift values for different UAVs, or by observing this shift at different times for a single UAV, it is possible to detect the user position on the ground. We have conducted computer simulations with different flight models and evaluated user position detection accuracy and Doppler shift distribution in detail. Further, a maximum positioning error estimation method based on the positioning accuracy index is proposed. Computer simulations were conducted assuming various types of flying UAVs, such as a circularly orbiting model and a figure-eight route model, to confirm the adequate flight model and the number of UAVs. Here, the positioning accuracy could be improved by measuring multiple Doppler shifts at different local times, which is equivalent to increasing the number of UAVs.
In this study, computer simulations are conducted using the least-squares method to evaluate positioning accuracy improvement based on multiple observations of Doppler shift, while assuming two UAVs flying with a figure-eight route model at different initial positions. Further, we estimate the position detection accuracy by the maximum positioning error estimation method for fundamental analysis.
Keyword (in Japanese) (See Japanese page) 
(in English) unmanned aerial vehicle / Doppler shift / multiple observation / maximum positioning error estimation method / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 189, SAT2021-50, pp. 36-41, Oct. 2021.
Paper # SAT2021-50 
Date of Issue 2021-09-30 (SAT) 
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 SAT2021-50

Conference Information
Committee SAT  
Conference Date 2021-10-07 - 2021-10-08 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SAT 
Conference Code 2021-10-SAT 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Positioning Accuracy Improvement Effect Based on Multiple Observations of Doppler shift for User Position Detection System Using Unmanned Aerial Vehicles 
Sub Title (in English)  
Keyword(1) unmanned aerial vehicle  
Keyword(2) Doppler shift  
Keyword(3) multiple observation  
Keyword(4) maximum positioning error estimation method  
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1st Author's Name Hiroyasu Ishikawa  
1st Author's Affiliation Nihon University (Nihon Univ.)
2nd Author's Name Hideyuki Shinonaga  
2nd Author's Affiliation Toyo University (Toyo Univ.)
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Speaker Author-1 
Date Time 2021-10-08 13:30:00 
Presentation Time 25 minutes 
Registration for SAT 
Paper # SAT2021-50 
Volume (vol) vol.121 
Number (no) no.189 
Page pp.36-41 
#Pages 6 
Date of Issue 2021-09-30 (SAT) 

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