The employment of extremely large antenna arrays and high-frequency signaling makes
future 6G wireless communications likely to operate in the near-field region. In this case, the …

This paper investigates the potential of near-field localization using widely-spaced multi-
subarrays (WSMSs) and analyzing the corresponding angle and range Cramér-Rao bounds …

Considering the dimensionality of a typical reconfigurable intelligent surface (RIS), channel
state information acquisition in RIS-assisted systems requires lengthy pilot transmissions …

To support extremely high data rates in 6G wireless networks, reconfigurable intelligent
surface (RIS)-assisted terahertz (THz) communications have gained much attention in recent …

The need for low latency and high data rates is increasing rapidly since the advent of
wireless communication. The current fifth-generation (5G) networks are unable to fulfill the …

In this letter, we propose an efficient off-grid sparse Bayesian learning (SBL) algorithm to
estimate the near-field (NF) channel in ultra-scale massive multiple-input multiple-output …

A joint cascaded channel estimation scheme is proposed for simultaneously transmitting
and reflecting reconfigurable intelligent surface (STAR-RIS) systems with hardware …

Terahertz (THz) communications is considered as one of key solutions to support extremely
high data demand in 6G. One main difficulty of the THz communication is the severe signal …

Terahertz (THz) ultra-massive multiple-input multiple-output (UM-MIMO) is envisioned as a
key technology to support ever-increasing data rates in 6G communication systems. To …

Extreme large-scale multiple-input multiple-output (XL-MIMO) is one of the key technologies
for future 6G communications. Channel estimation plays a crucial role in XL-MIMO systems …