Three-dimensional multiple input multiple output (3-D MIMO) with a large number of active
antennas equipped in a uniformly rectangular antenna array has a significant potential in …

Thanks to the channel reciprocity, the time division duplex (TDD) operation is more preferred
in massive multiple-input multiple-output (MIMO) systems. Avoiding the heavy feedback of …

Abstract Three-Dimensional (3D) Massive multiple-input-multiple-output (MIMO) is a new
and impressive concept. The beamforming in elevation and azimuth domains can reduce …

Training design for general multiple-input multiple-output (MIMO) systems is investigated in
this paper. Unlike prior designs that are applicable only for centralized MIMO systems with …

In this paper, we investigate the individual channel estimation over the three-node one-way
relay network, where all the nodes are equipped with multiple antennas. We first examine …

Data aggregation is a promising technology in the Internet-of-Things (IoT) network for a wide
range of applications, eg, environmental monitoring, traffic control, and real-time …

In this paper, we propose a general framework on the hybrid analog-digital transceiver
design for multi-hop communications. For the inclusive purpose, a transceiver model …

Beamforming design with partial channel estimation and feedback for frequency-division
duplexing (FDD) reconfigurable intelligent surface (RIS) assisted systems is considered in …

In this paper, we investigate the superimposed training matrix designs for the channel
estimation of amplify-and-forward (AF) multiple-input multiple-output (MIMO) relaying …

Channel estimation and data transmission constitute the most fundamental functional
modules of multiple-input multiple-output (MIMO) communication systems. The underlying …