{"ID":5443848,"CreatedAt":"2026-07-01T02:07:11.383974684Z","UpdatedAt":"2026-07-03T16:03:33.891311754Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2606.31911","arxiv_id":"2606.31911","title":"Trade-Offs in Decentralized Gigantic MIMO with Hard-Boundary Constraints","abstract":"To maintain the antenna apertures offered by 5G massive MIMO systems operating at the sub-6GHz band, known as FR1, 6G base stations (BSs) using the upper-mid band, FR3, should increase the number of antennas by a factor 4-8, giving rise to gigantic MIMO. This poses challenges in terms of processing complexity and interconnection bandwidth. The WAX framework, previously introduced for exploring trade-offs in decentralized architectures, may offer the flexibility needed to tackle these challenges. However, no results have been established on the applicability of this framework in the presence of hard-boundary constraints. The current work explores gigantic MIMO implementations based on a novel adaptation of the WAX framework, where the decentralized processing is performed by non-cooperating hardware modules. These modules may be implemented through state-of-the-art massive MIMO baseband units (BBUs). The results show the potential of the proposed framework towards exploiting trade-offs between complexity and performance in practical gigantic MIMO implementations.","short_abstract":"To maintain the antenna apertures offered by 5G massive MIMO systems operating at the sub-6GHz band, known as FR1, 6G base stations (BSs) using the upper-mid band, FR3, should increase the number of antennas by a factor 4-8, giving rise to gigantic MIMO. This poses challenges in terms of processing complexity and inter...","url_abs":"https://arxiv.org/abs/2606.31911","url_pdf":"https://arxiv.org/pdf/2606.31911v1","authors":"[\"Juan Vidal Alegría\",\"Joao Vieira\",\"Ove Edfors\"]","published":"2026-06-30T16:14:11Z","proceeding":"eess.SP","tasks":"[\"eess.SP\",\"cs.IT\"]","methods":"[\"Generative Adversarial Network\"]","has_code":false}