Tootfinder

AREE-Based Decoupled Design of Hybrid Beamformers in mmWave XL-MIMO Systems
Jiazhe Li, Nicol\`o Decarli, Francesco Guidi, Heng Dong, Anna Guerra, Alessandro Bazzi, Zhuoming Li
https://arxiv.org/abs/2507.02802

AREE-Based Decoupled Design of Hybrid Beamformers in mmWave XL-MIMO Systems
Hybrid beamforming has been widely employed in mmWave communications such as vehicular-to-everything (V2X) scenarios, as a compromise between hardware complexity and spectral efficiency. However, the inherent coupling between analog and digital precoders in hybrid array architecture significantly limits the computational and spectral efficiency of existing algorithms. To address this issue, we propose an alternating residual error elimination (AREE) algorithm, which decomposes the hybrid beamfo…

Dual Orthogonal Projections-Based Multiuser Interference Cancellation for mmWave Beamforming in XL-MIMO Systems
Jiazhe Li, Nicol\`o Decarli, Francesco Guidi, Anna Guerra, Alessandro Bazzi, Zhuoming Li
https://arxiv.org/abs/2508.16888

Dual Orthogonal Projections-Based Multiuser Interference Cancellation for mmWave Beamforming in XL-MIMO Systems
This paper investigates multiuser interference (MUI) cancellation for millimeter-wave (mmWave) beamforming in extremely large-scale multiple-input multiple-output (XL-MIMO) communication systems. We propose a linear algorithm, termed iterative dual orthogonal projections (DOP), which alternates between two orthogonal projections: one to eliminate MUI and the other to refine combiners, ensuring a monotonic increase in spectral efficiency. Theoretical analysis and simulation results show that, wi…