Remarkable research activities and major advances have been occurred over the past
decade in multiuser multiple-input multiple-output (MU-MIMO) systems. Several …

The substantial growth in mobile Internet and Internet of Things traffic has made system
capacity enhancement the most important requirement for next-generation mobile …

This paper proposes a practical channel estimation for 60-GHz indoor systems with the
massive uniform rectangular array at base station. Through antenna array theory, the …

Hybrid precoding is essential for millimeter wave (mmWave) multiple-input multiple output
(MIMO) systems due to its inherent advantage of a high gain, whilst alleviating the high cost …

In this paper, we investigate the reconfigurable intelligent surface (RIS)-enabled multiple-
input-single-output orthogonal frequency division multiplexing (MISO-OFDM) system under …

Statistical beamforming is an important technique for multi-user massive MIMO downlink,
since it depends on the downlink channel covariance only. In this paper, we first derive an …

Three-dimensional (3D) multiple input and multiple output (3D-MIMO) with massive
antennas is a key technology to achieve high spectral efficiency and user experienced data …

This paper considers the discrete-Fourier-transform-based hybrid beamforming multiuser
system and studies the use of analog beam selection schemes. We first analyze the uplink …

In this paper, we consider a generalized sub-array-connected (GSAC) architecture for
arbitrary radio frequency (RF) chain and antenna configurations, where the number of RF …

Massive multiple-input multiple-output systems deploying a large number of antennas at the
base station considerably increase the spectrum efficiency by serving multiple users …