Hybrid digital-to-analog (DA) precoding is a promising technology to reduce the number of
radio frequency (RF) chains in a millimetre-wave (mm-Wave) multiple-input multiple-output …

We consider channel estimation for high-speed railway communication systems, where both
the transmitter and the receiver are equipped with large-scale antenna arrays. It is known …

This paper focuses on the beam allocation problem with the target of maximizing the sum
rate in a switched-beam based massive multiple input multiple output (MIMO) system …

In future 5G communication systems, supporting high-quality wireless communications in
high-mobility scenarios becomes very essential. Although many existing works indicate that …

The high-speed railway (HSR) propagation channel has a significant impact on the design
and performance analysis of wireless railway control systems. This paper derives a …

The broadcast nature of wireless communication systems makes wireless transmission
extremely susceptible to eavesdropping and even malicious interference. Physical layer …

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 …

Device-to-Device (D2D) communications incorporated with content caching have been
regarded as a promising way to offload the cellular traffic data. In this paper, the caching …

The spectral efficiency of single‐cell multi‐user large‐scale distributed antenna system
(DAS) is studied. Firstly, the closed‐form expressions are derived for the uplink achievable …

In the long-term evolution for railway, orthogonal frequency-division multiplexing (OFDM) is
adopted to provide seamless connection to existing ground cellular network and support …