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Updated: Aug 10, 2025

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SpaceWire-to-UWB Wireless Interface Units for Intra-spacecraft Communication Links.

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Summary

This study validates novel wireless interface units (WIUs) for intra-spacecraft communication, replacing traditional SpaceWire (SpW) connections. The tested SpW-to-Ultra-Wideband WIUs successfully transmitted SpW data wirelessly, demonstrating TRL6 readiness for Low Earth Orbit missions.

Keywords:
Eu: CROPIS missionUWB transmissionsintra-spacecraft wireless communications

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Area of Science:

  • Spacecraft communication systems
  • Wireless networking in space
  • Ultra-Wideband (UWB) technology

Background:

  • Traditional on-board spacecraft networks rely on SpaceWire (SpW) connections.
  • Replacing wired connections with wireless alternatives can enhance flexibility and reduce mass.
  • The Eu:CROPIS mission requires robust intra-spacecraft communication solutions.

Purpose of the Study:

  • To test and validate novel SpW-to-UWB Wireless Interface Units (WIUs) for intra-spacecraft wireless transmission.
  • To assess the performance of proprietary TRL6 WIUs designed for spacecraft data handling units (PDHU) and command and data handling units (CDHU).
  • To evaluate the WIUs under mission-specific scenarios defined by the ESA-funded WiSAT-3 project.

Main Methods:

  • Prototyping and testing proprietary TRL6 WIUs integrating ISA100 over an IEEE 802.15.4 UWB PHY layer.
  • Implementing four validation test scenarios: link setup, end-to-end delay, maximum data rate, and housekeeping.
  • Utilizing STAR-Dundee SpW-capable equipment for validation tests.

Main Results:

  • Successful wireless transmission of SpaceWire data across the intra-spacecraft network in all experimental tests.
  • Demonstrated reliability of the SpW-to-UWB WIUs for Ultra-Wideband wireless communications within a simulated space shuttle environment.
  • Achieved Technology Readiness Level 6 (TRL6) for the developed WIU technology.

Conclusions:

  • The validated SpW-to-UWB WIUs are reliable for intra-spacecraft wireless communication.
  • This technology offers a viable alternative to traditional wired SpaceWire connections for future Low Earth Orbit (LEO) missions.
  • The successful demonstration confirms the suitability of UWB technology for space applications.