3 papers
cs.IT2026
Mitigation of UE Antenna Calibration Errors via Differential STBC in Cell-Free Massive MIMO
Marx M. M. Freitas, Stefano Buzzi
This letter investigates the use of differential space-time block coding (DSTBC) to address antenna array calibration impairments at multi-antenna user equipment (UE) in the downli…
cs.IT2025
Differential Space-Time Block Coding for Phase-Unsynchronized Cell-Free MIMO Downlink
Marx M. M. Freitas, Giovanni Interdonato, Stefano Buzzi
In the downlink of a cell-free massive multiple-input multiple-output (CF-mMIMO) system, spectral efficiency gains critically rely on joint coherent transmission, as all access poi…
cs.IT2025
Eliminating Phase Misalignments in Cell-Free Massive MIMO via Differential Transmission
Marx M. M. Freitas, Stefano Buzzi, Giovanni Interdonato
This paper proposes two approaches for overcoming access points' phase misalignment effects in the downlink of cell-free massive MIMO (CF-mMIMO) systems. The first approach is base…