Massive MIMO is a reality—What is next?: Five promising research directions for antenna arrays

TL;DR: In this article , the authors present several application scenarios and open research challenges for RIS-assisted UAV communication and elaborate research opportunities to design and optimize wireless systems with low energy footprint and at low cost.

TL;DR: This work proposes a distributed hybrid beamforming concept for mmWave cell-free massive MIMO systems, which supports multiantenna or even hybrid array based User Equipments (UEs) and multi-stream transmissions, and develops an interference aware digital precoding method to deal with multi-user/multi- stream transmissions.

TL;DR: This work proposes a channel-adaptive pilot design for FDD-MIMO systems using Gaussian mixture models (GMMs), enabling efficient pilot selection and channel estimation with superior performance across various SNR levels and pilot configurations.

TL;DR: The characteristics of indoor radio channels at millimeter waves are analyzed using a large virtual antenna array for massive multiple input multiple output (MIMO) applications and common MPC among the subarrays are identified.

TL;DR: The second edition of this respected text considerably expands the original and reflects the tremendous advances made in the discipline since 1968 as discussed by the authors, with a special emphasis on applications to diffraction, imaging, optical data processing, and holography.

TL;DR: In this article, the authors examined the performance of using multi-element array (MEA) technology to improve the bit-rate of digital wireless communications and showed that with high probability extraordinary capacity is available.

TL;DR: A cellular base station serves a multiplicity of single-antenna terminals over the same time-frequency interval and a complete multi-cellular analysis yields a number of mathematically exact conclusions and points to a desirable direction towards which cellular wireless could evolve.