17 citations · 17 across the 7 of their papers we have counts for
8 papers
Advanced Channel Decomposition Techniques in OTFS: A GSVD Approach for Multi-User Downlink
Omid Abbassi Aghd, Oussama Ben Haj Belkacem, Dou Hu +4
In this paper, we propose a multi-user downlink system for two users based on the orthogonal time frequency space (OTFS) modulation scheme. The design leverages the generalized sin…
Joint Active and Passive Beamforming for RIS-aided MIMO Communications with Low-Resolution Phase Shifts
Nuno Souto
Practical hardware limitations often impose a reduced number of available phase shifts at the elements of a reconfigurable intelligent surface (RIS). Most works often assume contin…
Optimizing the Achievable Rate in MIMO Systems Assisted by Multiple Reconfigurable Intelligent Surfaces
Nuno Souto, João Carlos Silva
In recent years there has been a growing interest in reconfigurable intelligent surfaces (RISs) as enablers for the realization of smart radio propagation environments which can pr…
A Generalized Space-Frequency Index Modulation Scheme for Downlink MIMO Transmissions with Improved Diversity
Vasco Velez, Joao Pedro Pavia, Nuno Souto +2
Multidimensional Index Modulations (IM) are a novel alternative to conventional modulations which can bring considerable benefits for future wireless networks. Within this scope, i…
Low Complexity Hybrid Precoding Designs for Multiuser mmWave/THz Ultra Massive MIMO Systems
Joao Pedro Pavia, Vasco Velez, Renato Ferreira +4
Millimeter-wave and terahertz technologies have been attracting attention from the wireless research community since they can offer large underutilized bandwidths which can enable…
A Precoding Aided Space Domain Index Modulation Scheme for Downlink Multiuser MIMO Systems
Nuno Souto, Américo Correia
In this correspondence, we propose a space domain index modulation (IM) scheme for the downlink of multiuser multiple-input multiple-output (MU-MIMO) systems. Instead of the most c…
Frequency Domain Equalization for Single and Multiuser Generalized Spatial Modulation Systems in Time Dispersive Channels
Nuno Souto, Américo Correia
In this letter, a low-complexity iterative detector with frequency domain equalization is proposed for generalized spatial modulation (GSM) aided single carrier (SC) transmissions…
An Alternating Direction Algorithm for Hybrid Precoding and Combining in Millimeter Wave MIMO Systems
Nuno Souto, João Silva, João Pavia +1
Millimeter-wave (mmWave) technology is one of the most promising candidates for future wireless communication systems as it can offer large underutilized bandwidths and eases the i…