Extremely large-scale multiple-input multiple-output (XL-MIMO) is a promising technology for
the sixth-generation (6G) mobile communication networks. By significantly boosting the …

Extremely large-scale antenna arrays, tremendously high frequencies, and new types of
antennas are three clear trends in multi-antenna technology for supporting the sixth …

Intelligent surfaces (ISs) have emerged as a key technology to empower a wide range of
appealing applications for wireless networks, due to their low cost, high energy efficiency …

Extremely large-scale array (XL-array) has emerged as a promising technology to enhance
the spectrum efficiency and spatial resolution in future wireless networks by exploiting …

Extremely large-scale arrays (XL-arrays) have emerged as a promising technology to
achieve super-high spectral efficiency and spatial resolution in future wireless systems. The …

Prior works on near-field beam training have mostly assumed dedicated polar-domain
codebook and on-grid range estimation, which, however, may suffer long training overhead …

Reconfigurable intelligent surface (RIS)-aided near-field communications are investigated.
First, the necessity of investigating RIS-aided near-field communications and the …

Multiple-antenna technologies are evolving towards large-scale aperture sizes, extremely
high frequencies, and innovative antenna types. This evolution is giving rise to the …

Downlink reconfigurable intelligent surface (RIS)-assisted multi-input-multi-output (MIMO)
systems are considered with far-field, near-field, and hybrid-far-near-field channels …

This paper investigates beam training for extremely large-scale multiple-input multiple-
output systems. By considering both the near field and far field, a triple-refined hybrid-field …