Optimal Beamforming for Rate-Splitting Multiple Access

Tutor: Bho Matthiesen
Type of Thesis: Project (MSc), Master's thesis (MSc)
date of issue: -
Student: -
Status: available

The performance of contemporary wireless communication systems is essentially limited by interference. State-of-the-art systems rely on orthogonal multiple access (OMA) techniques where interference is treated as additional noise, e.g., 5G systems, millimeter wave MIMO, massive MIMO, and CoMP. Another interference mitigation strategy known as non-orthogonal multiple access (NOMA) is to fully decode interference.

These two interference management techniques are complimentary and can be combined by the rate splitting multiple access scheme (RSMA). The general idea is to split messages and transmit them non-orthogonally in common messages that are decoded by multiple receivers and private messages decoded only by their corresponding receiver and treated as noise otherwise. This results in an extremely versatile transmission framework with similar receiver complexity as NOMA but much higher robustness against changing conditions that will be a key enabling technology for beyond 5G systems.

Evaluating the performance of RSMA over state-of-the-art multiple access schemes requires the solution of a challenging NP-hard optimization problem with very high computational complexity. The goal of this thesis is to adapt an existing solution of the corresponding beamforming problem to a different performance metric, implement this solution, and evaluate the gain of RSMA over NOMA and OMA.

This thesis requires knowledge in communication theory. Good math skills, prior exposition to optimization theory, and the ability to program in C++ are desirable. This thesis can be written in English or German.

Last change on 16.11.2020 by B. Matthiesen
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