4 papers
Can Reciprocal RIS Perform as Non-Reciprocal RIS?
Matteo Nerini, Juan Vidal Alegría, Bruno Clerckx
Yes, if and only if some optimal non-reciprocal RIS (i.e., maximizing a given performance metric) makes the round-trip channel transmitter-RIS-transmitter symmetric, which holds if…
Robust High Mobility NLOS UE Beamforming Strategy for Gigantic MIMO
Josep R. Fernández Rull, Liang Liu, Henrik Sjöland +1
Maintaining robust and stable communication links in high-mobility scenarios is challenging for time-division duplex (TDD) reciprocity-based gigantic MIMO systems due to rapid chan…
Zero-Forcing MU-MIMO Precoding under Power Amplifier Non-Linearities
Juan Vidal Alegría, Ashkan Sheikhi, Ove Edfors
In multi-user multiple-input multiple-output (MU-MIMO) systems, the non-linear behavior of the power amplifiers (PAs) may cause degradation of the linear precoding schemes dealing…
Dimensionally-Efficient Transmission and Storage of Unitary Matrices
Juan Vidal Alegría
Unitary matrices are the basis of a large number of signal processing applications. In many of these applications, finding ways to efficiently store, and even transmit these matric…