Experimental Evaluation of Ultra Wideband Wireless Links within a Spacecraft for Replacing Wired Interface Buses

Shinichiro HAMADA; Atsushi TOMIKI; Tomoaki TODA; Takehiko KOBAYASHI

doi:10.1587/transfun.E96.A.927

Experimental Evaluation of Ultra Wideband Wireless Links within a Spacecraft for Replacing Wired Interface Buses

Shinichiro HAMADA, Atsushi TOMIKI, Tomoaki TODA, Takehiko KOBAYASHI

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A use of ultra wideband (UWB) technology within spacecrafts has been proposed with a view to partially replacing wired interface buses with wireless connections. Adoption of wireless technologies within the spacecrafts could contribute to reduction in cable weight (and launching cost as a result), reduction in the cost of manufacture, more flexibility in layout of spacecraft subsystems, and reliable connections at rotary, moving, and sliding joints. However, multipath propagation in semi-closed conductive enclosures, such as spacecrafts, restricts the link performance. In this paper, UWB and narrowband propagation were measured in a UWB frequency band (from 3.1 to 10.6 GHz, the full-band UWB approved in the United States) within a small spacecrafts and a shield box of the same size. While narrowband propagation resulted in considerable spatial variations in propagation gain due to interferences caused by multipath environments, UWB yielded none. This implies that the UWB systems have an advantage over narrowband from a viewpoint of reducing fading margins. Throughputs exceeding 80 Mb/s were obtained by means of commercially-available UWB devices in the spacecraft. Path gains and throughputs were also measured for various antenna settings and polarizations. Polarization configurations were found to produce almost no effect on average power delay profiles and substantially small effects on the throughputs. Significantly long delay spreads and thus limited link performance are caused by a conductive enclosure (the shield box) without apertures on the surfaces. Even in such an environment, it was found that delay spreads can be suppressed by partially paneling a radio absorber on the inner surfaces. More than 96 Mb/s throughputs were attained when the absorber panel covered typically 4% of the total inner surface area.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E96-A No.5 pp.927-934

Publication Date: 2013/05/01

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Online ISSN: 1745-1337

DOI: 10.1587/transfun.E96.A.927

Type of Manuscript: Special Section PAPER (Special Section on Networked Control Systems: Theories & Applications)

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Shinichiro HAMADA, Atsushi TOMIKI, Tomoaki TODA, Takehiko KOBAYASHI, "Experimental Evaluation of Ultra Wideband Wireless Links within a Spacecraft for Replacing Wired Interface Buses" in IEICE TRANSACTIONS on Fundamentals, vol. E96-A, no. 5, pp. 927-934, May 2013, doi: 10.1587/transfun.E96.A.927.
Abstract: A use of ultra wideband (UWB) technology within spacecrafts has been proposed with a view to partially replacing wired interface buses with wireless connections. Adoption of wireless technologies within the spacecrafts could contribute to reduction in cable weight (and launching cost as a result), reduction in the cost of manufacture, more flexibility in layout of spacecraft subsystems, and reliable connections at rotary, moving, and sliding joints. However, multipath propagation in semi-closed conductive enclosures, such as spacecrafts, restricts the link performance. In this paper, UWB and narrowband propagation were measured in a UWB frequency band (from 3.1 to 10.6 GHz, the full-band UWB approved in the United States) within a small spacecrafts and a shield box of the same size. While narrowband propagation resulted in considerable spatial variations in propagation gain due to interferences caused by multipath environments, UWB yielded none. This implies that the UWB systems have an advantage over narrowband from a viewpoint of reducing fading margins. Throughputs exceeding 80 Mb/s were obtained by means of commercially-available UWB devices in the spacecraft. Path gains and throughputs were also measured for various antenna settings and polarizations. Polarization configurations were found to produce almost no effect on average power delay profiles and substantially small effects on the throughputs. Significantly long delay spreads and thus limited link performance are caused by a conductive enclosure (the shield box) without apertures on the surfaces. Even in such an environment, it was found that delay spreads can be suppressed by partially paneling a radio absorber on the inner surfaces. More than 96 Mb/s throughputs were attained when the absorber panel covered typically 4% of the total inner surface area.
URL: https://globals.ieice.org/en_transactions/fundamentals/10.1587/transfun.E96.A.927/_p

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@ARTICLE{e96-a_5_927,
author={Shinichiro HAMADA, Atsushi TOMIKI, Tomoaki TODA, Takehiko KOBAYASHI, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Experimental Evaluation of Ultra Wideband Wireless Links within a Spacecraft for Replacing Wired Interface Buses},
year={2013},
volume={E96-A},
number={5},
pages={927-934},
abstract={A use of ultra wideband (UWB) technology within spacecrafts has been proposed with a view to partially replacing wired interface buses with wireless connections. Adoption of wireless technologies within the spacecrafts could contribute to reduction in cable weight (and launching cost as a result), reduction in the cost of manufacture, more flexibility in layout of spacecraft subsystems, and reliable connections at rotary, moving, and sliding joints. However, multipath propagation in semi-closed conductive enclosures, such as spacecrafts, restricts the link performance. In this paper, UWB and narrowband propagation were measured in a UWB frequency band (from 3.1 to 10.6 GHz, the full-band UWB approved in the United States) within a small spacecrafts and a shield box of the same size. While narrowband propagation resulted in considerable spatial variations in propagation gain due to interferences caused by multipath environments, UWB yielded none. This implies that the UWB systems have an advantage over narrowband from a viewpoint of reducing fading margins. Throughputs exceeding 80 Mb/s were obtained by means of commercially-available UWB devices in the spacecraft. Path gains and throughputs were also measured for various antenna settings and polarizations. Polarization configurations were found to produce almost no effect on average power delay profiles and substantially small effects on the throughputs. Significantly long delay spreads and thus limited link performance are caused by a conductive enclosure (the shield box) without apertures on the surfaces. Even in such an environment, it was found that delay spreads can be suppressed by partially paneling a radio absorber on the inner surfaces. More than 96 Mb/s throughputs were attained when the absorber panel covered typically 4% of the total inner surface area.},
keywords={},
doi={10.1587/transfun.E96.A.927},
ISSN={1745-1337},
month={May},}

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TY - JOUR
TI - Experimental Evaluation of Ultra Wideband Wireless Links within a Spacecraft for Replacing Wired Interface Buses
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 927
EP - 934
AU - Shinichiro HAMADA
AU - Atsushi TOMIKI
AU - Tomoaki TODA
AU - Takehiko KOBAYASHI
PY - 2013
DO - 10.1587/transfun.E96.A.927
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E96-A
IS - 5
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - May 2013
AB - A use of ultra wideband (UWB) technology within spacecrafts has been proposed with a view to partially replacing wired interface buses with wireless connections. Adoption of wireless technologies within the spacecrafts could contribute to reduction in cable weight (and launching cost as a result), reduction in the cost of manufacture, more flexibility in layout of spacecraft subsystems, and reliable connections at rotary, moving, and sliding joints. However, multipath propagation in semi-closed conductive enclosures, such as spacecrafts, restricts the link performance. In this paper, UWB and narrowband propagation were measured in a UWB frequency band (from 3.1 to 10.6 GHz, the full-band UWB approved in the United States) within a small spacecrafts and a shield box of the same size. While narrowband propagation resulted in considerable spatial variations in propagation gain due to interferences caused by multipath environments, UWB yielded none. This implies that the UWB systems have an advantage over narrowband from a viewpoint of reducing fading margins. Throughputs exceeding 80 Mb/s were obtained by means of commercially-available UWB devices in the spacecraft. Path gains and throughputs were also measured for various antenna settings and polarizations. Polarization configurations were found to produce almost no effect on average power delay profiles and substantially small effects on the throughputs. Significantly long delay spreads and thus limited link performance are caused by a conductive enclosure (the shield box) without apertures on the surfaces. Even in such an environment, it was found that delay spreads can be suppressed by partially paneling a radio absorber on the inner surfaces. More than 96 Mb/s throughputs were attained when the absorber panel covered typically 4% of the total inner surface area.
ER -