Unmanned aerial vehicles (UAVs) have found widespread commercial, civilian, and military
applications. Wireless communication has always been one of the core technologies for …

Terahertz (THz) communications are celebrated as key enablers for converged localization
and sensing in future sixth-generation (6G) wireless communication systems and beyond …

In this letter, we consider hybrid beamforming for millimeter wave (mmWave) MIMO
integrated sensing and communications (ISAC). We design the transmit beam of a dual …

Extremely large-scale array (XL-array) has emerged as a promising technology to improve
the spectrum efficiency and spatial resolution of future wireless systems. However, the huge …

Reconfigurable intelligent surface (RIS) has emerged as a competitive solution to the
blocking problem in millimeter wave (mmWave) communications. However, due to the …

Extremely large-scale MIMO (XL-MIMO) is a promising technique for future 6G
communications. The sharp increase in the number of antennas results in a transition of …

In this paper, beam training and beam tracking are investigated for extremely large-scale
multiple-input-multiple-output communication systems with partially-connected hybrid …

Beam alignment–the process of finding an optimal directional beam pair–is a challenging
procedure crucial to millimeter wave (mmWave) communication systems. We propose a …

Extremely large-scale multiple-input multiple-output (XL-MIMO) is considered as a key
technology for future wireless communications. For near-field beam training in XL-MIMO, the …

As the energy-saving array composed of passive elements, reconfigurable intelligent
surface (RIS) will evolve to the extremely large-scale RIS (XL-RIS) to overcome serious path …