Problem
Research questions and friction points this paper is trying to address.
sub-THz
LEO satellite communication
space prototype
wireless backhaul
satellite links
Sub Terahertz LEO Satellite Communication: Vision, Opportunities, and Challenges toward the First Prototype in Space
🤖 AI Summary
This work addresses the limitations of existing millimeter-wave and laser-based satellite-to-ground communication systems in terms of capacity, robustness, and architectural flexibility by proposing and advancing the first terahertz (100–300 GHz) communication system tailored for low Earth orbit (LEO) satellites. It evaluates the maturity of emerging sub-terahertz RF front-ends, high-gain antenna arrays, spectrally efficient modulation and coding schemes, and signal processing techniques resilient to atmospheric attenuation to demonstrate the feasibility of such systems over hundred-kilometer-scale inter-satellite and satellite-to-ground links. The project fills a critical gap in space communications within this underutilized frequency band, establishes a novel architecture that jointly achieves high capacity and high resilience, and delivers a comprehensive technology roadmap to support the international TeraLink initiative, with plans to deploy the world’s first sub-terahertz LEO satellite communication prototype via a NASA CSLI mission.
📝 Abstract
The landscape of sub-terahertz (sub-THz, 100GHz - 300GHz) wireless technology evolved drastically over the last two decades - from only a few niche use cases in sensing and ultra-short-range communications in early 2000s toward operational multi-kilometer range 100GBbit/s+ wireless backhaul links demonstrated recently. Building on this momentum, this article explores the feasibility of extending sub-THz communications to 100-km-scale satellite links. We first assess the technological readiness of emerging sub-THz hardware and signal-processing techniques, highlighting their potential to support long-range operation in low-Earth-orbit (LEO) systems. We then outline the unique role that sub-THz links can play as a complementary solution to existing millimeter-wave and optical (``laser'') satellite technologies, offering additional capacity, improved resilience, and new architectural flexibility. We further discuss open research and engineering challenges toward implementing such sub-THz satellite communication systems in practice. We finally outline the key state-of-the-art solutions and the roadmap of TeraLink, an ongoing international R&D project aiming to build and launch, through an approved NASA CSLI space mission, the first hardware prototype of sub-THz LEO satellite communications in space.
Innovation
Methods, ideas, or system contributions that make the work stand out.
sub-THz communication
LEO satellite
space prototype
wireless backhaul
TeraLink
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