The increasing wireless data traffic demands have driven the need to explore suitable
spectrum regions for meeting the projected requirements. In the light of this, millimeter wave …

Millimeter-wave (mmWave) communication technology offers a potential and promising
solution to support 5G and B5G wireless networks in dynamic scenarios and applications …

Extremely large-scale multiple-input-multiple-output (XL-MIMO) is promising to meet the
high rate requirements for future 6G. To realize efficient precoding, accurate channel state …

Multiple antenna technologies have attracted much research interest for several decades
and have gradually made their way into mainstream communication systems. Two main …

Spatial division multiple access (SDMA) is essential to improve the spectrum efficiency for
multi-user multiple-input multiple-output (MIMO) communications. The classical SDMA for …

We propose a holographic version of a reconfigurable intelligent surface (RIS) and
investigate its application to terahertz (THz) massive multiple-input multiple-output systems …

Millimeter wave (mmWave) communications have recently attracted large research interest,
since the huge available bandwidth can potentially lead to the rates of multiple gigabit per …

For millimeter wave (mmWave) massive multiple-input multiple-output (MIMO) systems,
hybrid processing architecture is usually used to reduce the complexity and cost, which …

When there are a large number of antennas in massive MIMO systems, the transmitted
wideband signal will be sensitive to the physical propagation delay of electromagnetic …

Hybrid analog and digital precoding allows millimeter wave (mmWave) systems to achieve
both array and multiplexing gain. The design of the hybrid precoders and combiners …