To achieve the performance gains of massive multiple-input multiple-output (MIMO) systems,
the downlink channel state information (CSI) must be acquired at the base station (BS). In …

Cell-free massive multiple-input–multiple-output (CF mMIMO) is a promising technology to
enhance the spectrum efficiency in future wireless systems by leveraging distributed access …

We consider the downlink of cell-free massive multiple-input multiple-output (MIMO) systems
with orthogonal time frequency space (OTFS) modulation. Two pilot-based channel …

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 …

Massive multi-input multi-output systems with large-scale transmit antenna arrays can bring
significant improvements in the spectral efficiency and energy efficiency. To fully enjoy the …

This paper investigates the downlink (DL) performance of cell-free (CF) massive multiple-
input multiple-output (mMIMO) systems with limited capacity fronthaul links. The achievable …

Cell-free (CF) massive multiple-input multiple-output (MIMO) is considered as a promising
technology for achieving the ultimate performance limit. However, due to its distributed …

Massive multiple-input multiple-output (MIMO) can boost the spectrum and energy efficiency
for the next generation wireless communication systems. However, pilot contamination …

Efficient channel state information at transmitter (CSIT) for frequency division duplex (FDD)
massive MIMO can facilitate its backward compatibility with existing FDD cellular networks …

While acquiring channel state information at the transmitter (CSIT) in time division duplexing
systems can exploit channel reciprocity, acquiring accurate CSIT in frequency division …