Multiple-antenna technologies are evolving towards larger aperture sizes, extremely high
frequencies, and innovative antenna types. This evolution is fostering the emergence of near …

The capacity limits of continuous-aperture array (CAPA)-based wireless communications are
characterized. To this end, an analytically tractable transmission framework is established …

The performance of multiplexing and diversity achieved by continuous aperture arrays
(CAPAs) over fading channels is analyzed. Angular-domain fading models are derived for …

Wireless communication systems to date primarily rely on the orthogonality of resources to
facilitate the design and implementation, from user access to data transmission. Emerging …

In this paper, we study efficient multi-beam training design for near-field communications to
reduce the beam training overhead of conventional single-beam training methods. In …

Extremely large-scale arrays (XL-arrays) have emerged as one promising technology to
improve the spectral efficiency and spatial resolution in future sixth generation (6G) wireless …

The performance of continuous aperture array (CAPA)-based wireless communications is
analyzed in an uplink scenario. An analytical framework is proposed to characterize uplink …

A Cram\'er-Rao bound (CRB) optimization framework for near-field sensing (NISE) with
continuous-aperture arrays (CAPAs) is proposed. In contrast to conventional spatially …

The signal processing community is currently witnessing a growing interest in near-field
signal processing, driven by the trend towards the use of large aperture arrays with high …

A continuous-aperture array (CAPA)-based secure transmission framework is proposed to
enhance physical layer security. Continuous current distributions, or beamformers, are …