Most wireless communication systems operate in the far-field region of antennas and
antenna arrays, where waves are planar and beams have infinite depth. When antenna …

Massive multiple-input multiple-output (MIMO) for 5G is evolving into the extremely large-
scale antenna array (ELAA) to increase the spectrum efficiency by orders of magnitude for …

The natural integration of extremely large antenna arrays (ELAAs) and terahertz (THz)
communications can potentially establish Tbps data links for 6G networks. However, due to …

The narrowband and far-field assumption in conventional wireless system design leads to a
mismatch with the optimal beamforming required for wideband and near-field systems. This …

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 …

The paper investigates the beamforming (BF) performance of large, potentially
unconstrained in size antenna arrays when equipped with arbitrarily many elements. A …

We propose an efficient method for designing broad beams with spatially flat array factor
and efficient power utilization for cell-specific coverage in communication systems equipped …

The number of users that can be spatially multiplexed by a wireless access point depends
on the aperture of its antenna array. When the aperture increases and wavelength …

Phased arrays, commonly used in IEEE 802.11 ad and 5G radios, are capable of focusing
radio frequency signals in a specific direction or a spatial region. Beamforming achieves …

Extremely large-scale array (XL-array) has emerged as a promising technology to enable
near-field communications for achieving enhanced spectrum efficiency and spatial …