Master Thesis: Relativistic effects on 6G LEO satellite mega-constellations

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About this opportunity:

In recent years satellite technology evolved through advances in miniaturization, launch economics and radio technologies enabling the deployment of mega-constellations consisting of thousands of satellites. Non-Terrestrial Networks (NTN) have been incorporated in 5G cellular standard and will be integral part of 6G from day 1. A natural evolution of this paradigm is to provide a positioning service with an accuracy similar to what is possible nowadays with Global Navigation Satellite Systems (GNSS) but fully integrated in the cellular network. Nevertheless, it is well known that to achieve the required accuracy, relativistic effects must be taken into account. It is therefore crucial to understand the implications of these effects on the existing cellular standard and to adopt countermeasures tailored to the cellular NTN ecosystem.

What you will do:

The thesis has the objective of providing insights and understanding regarding the challenges posed by relativity in 6G LEO mega-constellation, evaluating quantitavily the magnitude of those effect and design countermeasures to allow positioning performance comparable to those of GNSS.

The following steps are envisioned as part of the thesis work:

• Evaluation of propagation delay, doppler shift, received power in satellite links
• Quantification of the perturbations to the ideal LEO orbits due to atmospheric drag, orbital manouvers, Moon/Sun gravity etc.
• Quantification of accumulated time error due to time dilation along the perturbed orbit.
• Design of network synchronization or positioning procedures accounting for relativistic effects.

The thesis will be concluded with a result presentation for the Ericsson research team.

The skills you bring:

• MSc student in Theoretical Physics, Space Engineering, Astronomy, or related field.
• Knowledge in areas such as relativity, astronomy, and astrophysics.
• Background in wireless communication or positioning systems is preferred.
• Knowledge in orbital mechanics is a plus.

Why join Ericsson?

At Ericsson, you'll have an outstanding opportunity. The chance to use your skills and imagination to push the boundaries of what's possible. To build solutions never seen before to some of the world's toughest problems. You'll be challenged, but you won't be alone. You'll be joining a team of diverse innovators, all driven to go beyond the status quo to craft what comes next.

What happens once you apply?

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Encouraging a diverse and inclusive organization is core to our values at Ericsson, that's why we champion it in everything we do. We truly believe that by collaborating with people with different experiences we drive innovation, which is essential for our future growth. We encourage people from all backgrounds to apply and realize their full potential as part of our Ericsson team. Ericsson is proud to be an Equal Opportunity Employer. learn more.

Primary country and city:Sweden (SE) || Stockholm

Req ID:777105