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arXiv · 2408.00553

Manifold-Based Optimizations for RIS-Aided Massive MIMO Systems

Wilson de Souza Junior·David William Marques Guerra·José Carlos Marinello·Taufik Abrão·Ekram Hossain
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Abstract

Manifold optimization (MO) is a powerful mathematical framework that can be applied to optimize functions over complex geometric structures, which is particularly useful in advanced wireless communication systems, such as reconfigurable intelligent surface (RIS)-aided massive MIMO (mMIMO) and extra-large scale massive MIMO (XL-MIMO) systems. MO provides a structured approach to tackling complex optimization problems. By leveraging the geometric properties of the manifold, more efficient and effective solutions can be found compared to conventional optimization methods. This paper provides a tutorial on MO technique and provides some applications of MO in the context of wireless communications systems. In particular, to corroborate the effectiveness of MO methodology, we explore five application examples in RIS-aided mMIMO system, focusing on fairness, energy efficiency (EE) maximization, intracell pilot reuse interference mitigation, and grant-free (GF) random access (RA).

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Wilson de Souza Junior, David William Marques Guerra, José Carlos Marinello, Taufik Abrão, Ekram Hossain. 2024-08-01. Manifold-Based Optimizations for RIS-Aided Massive MIMO Systems. https://arxiv.org/abs/2408.00553

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