The Reconfigurable Intelligent Surface (RIS) constitutes one of the prominent technologies
for the next generation of wireless communications. It is envisioned to enhance the signal …

Pilot symbol assisted modulation (PSAM) is widely used to obtain the channel state
information (CSI) needed for coherent demodulation. It allows the density of pilot symbols to …

Orthogonal frequency division multiplexing (OFDM) and multiple-input multiple-output
(MIMO) are wireless radio technologies adopted by the new Fifth Generation (5G) of mobile …

Reflecting Surfaces (RSs) are being lately envisioned as an energy efficient solution
capable of enhancing the signal coverage in cases where obstacles block the direct …

Abstract The Reconfigurable Intelligent Surface (RIS) constitutes one of the prominent
technologies for the 6th Generation (6G) of wireless communications. It is envisioned to …

Non-coherent (NC) schemes combined with massive antenna arrays are proposed to
replace traditional coherent schemes in scenarios which require an excessive number of …

The Reconfigurable Intelligent Surfaces (RIS) constitute one of the prominent technologies
for the next generation of wireless communications. They are mainly envisioned to efficiently …

A cell-free non-coherent (NC) massive single-input-multiple-output (SIMO) system is
proposed in a wireless uplink where a single-antenna user transmits to several multi …

The Reconfigurable Intelligent Surface (RIS) constitutes one of the prominent technologies
for the next 6-th Generation (6G) of wireless communications. It is envisioned to enhance …

Under the condition of limited number of antennas in current noncoherent single-input-
multiple-output (SIMO), the key problems of serious mutual interference and small number of …