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Measurements of UWB Propagation and Transmission for Wireless Links in Spacecrafts

Authors:
Miyuki Hirose
Takehiko Kobayashi

Keywords: intra-spacecraft wireless communication; urtra-wideband; radio propagation; delay spreads.

Abstract:
This paper presents measurement and characterization of ultra wideband propagation with a view to (at least partly) replacing wired interface buses in spacecrafts with wireless links. Channel responses in the frequency- and time-domain, spatial distributions of UWB and narrowband propagation gains, delay spreads, and throughputs were measured with use of four different-sized shield boxes (simulating miniature satellites). In terms of Frequency domain, narrowband resulted in nearly 35-dB fading at several “dead spots” caused by multipath environment, UWB yielded none. However, significantly long delay spreads and thus limited link performance are caused by multipaths within a conductive enclosure. Even in such an environment, it was found that delay spreads can be suppressed by partially paneling a radio absorber and apertures (perforated on the outer surface of satellites). The results revealed that commercially-available UWB devices were capable of accommodate up to 480-Mb/s data buses within spacecrafts.

Pages: 12 to 17

Copyright: Copyright (c) IARIA, 2016

Publication date: February 21, 2016

Published in: conference

ISSN: 2308-4480

ISBN: 978-1-61208-453-4

Location: Lisbon, Portugal

Dates: from February 21, 2016 to February 25, 2016