This paper investigates the sparse channel estimation for holographic multiple-input multiple-
output (HMIMO) systems. Given that the wavenumber-domain representation is based on a …

The initial studies on the technology of reconfigurable intelligent surfaces (RISs) focused on
unveiling the potential of metasurfaces for improving communication coverage and …

Large intelligent surfaces arise as an emerging technology and critical building block for
sixth-generation (6G) wireless networks. Reconfigurable holographic surfaces (RHSs) have …

We solve a long-standing set of problems in optics and waves: why does a volume have
only so many useful orthogonal wave channels in or out of it, why do coupling strengths fall …

Wireless communications in the THz frequency band is an envisioned revolutionary
technology for sixth Generation (6G) networks. However, such frequencies impose certain …

The recently advocated reconfigurable holographic surface (RHS) is anticipated to bring
substantial improvement in communication throughput, especially for the multi-node …

Stacked intelligent metasurface (SIM) is an emerging programmable metasurface
architecture that can imple-ment signal processing directly in the electromagnetic wave …

As studies on RIS quickly mature, it is time for RIS to be considered and studied by the
industry in terms of prototyping, standardization, field trials, and commercialization. As the …

Motivated by the challenges of future 6G communications where terahertz (THz)
frequencies, intelligent reflective surfaces (IRSs) and ultra-wideband (UWB) signals coexist …

Reconfigurable holographic surfaces (RHSs) for multi-beam steering applications have
been receiving significant attention due to their low fabrication cost and power consumption …