While massive multiple-input multiple-output (MIMO) has achieved tremendous success in
both theory and practice, it faces a crisis of sharp performance degradation in moderate or …

Channel state information (CSI) estimation is part of the most fundamental problems in 5G
wireless communication systems. In mobile scenarios, outdated CSI will have a serious …

For implementation of massive multiple-input multiple-output (MIMO) cellular systems in
frequency division duplex (FDD) mode, accurate estimation of downlink channel state …

One challenge for FDD massive MIMO communication system is how to obtain the downlink
channel state information (CSI) at the base station. Except for traditional codebook feedback …

Massive MIMO forms a crucial component for 5G because of its ability to improve quality of
service and support multiple streams simultaneously. However, for real-world MIMO …

Massive multiple-input multiple-output (MIMO) is believed to deliver unrepresented spectral
efficiency gains for 5G and beyond. However, a practical challenge arises during its …

Recent advancement in Frequency Domain Duplexing (FDD) enables wireless systems to
use different frequency bands for uplink and downlink communication without explicit …

This letter reports the concept, design, fabrication, and characterization of a novel 64-
element, slot-based and substrate-integrated coaxial line (SICL)-fed dual-polarized antenna …

We propose a learning-based scheme to investigate the dynamic multi-channel access
(DMCA) problem in the fifth generation (5G) and beyond networks with fast time-varying …

Power optimization has a significant role in multi-user massive multiple-input and multiple-
output (mMIMO) wireless communication systems, whereas the acquisition of instantaneous …