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Paper Abstract and Keywords
Presentation 2013-07-09 13:00
[Poster Presentation] Stochastic Modeling of Ultra Wideband Propagation Channels within a Small Spacecraft for Replacing Onboard Data Busses with Wireless Connections
Miyuki Hirose (Tokyo Denki Univ.), Atsushi Tomiki, Tomoaki Toda (JAXA), Takehiko Kobayashi (Tokyo Denki Univ./JAXA) WBS2013-14
Abstract (in Japanese) (See Japanese page) 
(in English) Ultra wideband (UWB) propagation was measured and characterized within spacecrafts, with a view to partly replacing onboard data buses with wireless connections. Adaptation of wireless technologies in spacecrafts could contribute to: reduction of cable weight (and launching cost as a result), more flexibility in layout of spacecraft subsystems, and reliable connections at rotary, moving, and sliding joints. However, multipath propagation in semi-closed metal enclosures, such as spacecrafts, restricts the transmission performance. To realize the above benefits, multipath propagation affecting the transmission performance must be scrutinized. Spatial distributions of UWB and narrowband propagation in frequency (from 3.1 to 10.6 GHz) and time domains were measured with a microwave vector network analyzer. While narrowband resulted in a number of dead spots (deep fading points) within the conductive enclosures, UWB yielded none. In this present paper, UWB channels within a small scientific satellite was measured and statistically analyzed, based on a modified Saleh-Valenzuela (SV) model [2], which modeled indoor UWB propagation channels. The modified SV model is based on a cluster concept of rays. The clusters, as well as the multipath components within a cluster, arrive according to Poisson processes with different rates. The received power of both the cluster and the rays within a cluster decays exponentially.
Keyword (in Japanese) (See Japanese page) 
(in English) Channel modeling / ultra wideband / propagation / small spacecraft / / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 117, WBS2013-14, pp. 5-10, July 2013.
Paper # WBS2013-14 
Date of Issue 2013-07-02 (WBS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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 WBS MICT  
Conference Date 2013-07-09 - 2013-07-10 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To WBS 
Conference Code 2013-07-WBS-MICT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Stochastic Modeling of Ultra Wideband Propagation Channels within a Small Spacecraft for Replacing Onboard Data Busses with Wireless Connections 
Sub Title (in English)  
Keyword(1) Channel modeling  
Keyword(2) ultra wideband  
Keyword(3) propagation  
Keyword(4) small spacecraft  
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1st Author's Name Miyuki Hirose  
1st Author's Affiliation Tokyo Denki University (Tokyo Denki Univ.)
2nd Author's Name Atsushi Tomiki  
2nd Author's Affiliation Japan Aerospace Exploration Agency (JAXA)
3rd Author's Name Tomoaki Toda  
3rd Author's Affiliation Japan Aerospace Exploration Agency (JAXA)
4th Author's Name Takehiko Kobayashi  
4th Author's Affiliation Tokyo Denki University/Japan Aerospace Exploration Agency (Tokyo Denki Univ./JAXA)
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Speaker Author-1 
Date Time 2013-07-09 13:00:00 
Presentation Time 100 minutes 
Registration for WBS 
Paper # WBS2013-14 
Volume (vol) vol.113 
Number (no) no.117 
Page pp.5-10 
#Pages
Date of Issue 2013-07-02 (WBS) 


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