Paper on Beam Alignment for Cell-Free mmWave Massive MU-MIMO accepted at SiPS'22!

Congratulations to Jannik Brun for the acceptance of his paper at SiPS 2022.

18.07.2022 by Victoria Menescal Tupper Palhares

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system_overview — Visualization of the considered cell-free scenario. The UEs use a single RF chain to load the antennas via phase shifters. The APs are fully digital.

The paper “Beam Alignment for the Cell-Free mmWave Massive MU-MIMO Uplink” proposes an interference-aware method for beam alignment (BA) in the cell-free millimeter-wave (mmWave) massive multiuser (MU) multiple-input multiple-output (MIMO) uplink. In the considered scenario, the APs perform full digital receive beamforming while the user equipments (UEs) perform analog transmit beamforming. The authors evaluate the method using realistic mmWave channels from a commercial ray-tracer, showing the superiority of the proposed method over omnidirectional transmission as well as over methods that do not take MU interference into account.

Simulated scenario with 1336 possible UE locations (red), each with n_UE = 8 antennas, and L = 16 APs (green), each with n_AP = 4 antennas.

The paper has been co-authored by Jannik Brun, Victoria Palhares, Gian Marti, and Prof. Christoph Studer from the IIP Group and will be presented at the 2022 International Workshop on Signal Processing Systems (SiPS) in Rennes, France. You can find a preprint on external page arXiv.