One major practical issue for the implementation of frequency division duplex (FDD)
massive MIMO systems is that the acquisition of channel state information at the transmitter …

In this paper, we study the channel estimation problem in correlated massive multiple-input-
multiple-output (MIMO) systems with a reduced number of radio-frequency (RF) chains …

As the most promising technology in wireless communications, massive multiple-input
multiple-output (MIMO) faces a significant challenge in practical implementation because of …

Massive multiple-input multiple-output (massive-MIMO) is foreseen as a potential technology
for future 5G cellular communication networks due to its substantial benefits in terms of …

We study downlink channel estimation in a multi-cell Massive multiple-input multiple-output
(MIMO) system operating in time-division duplex. The users must know their effective …

This paper addresses the problem of joint downlink channel estimation and user grouping in
massive multiple-input multiple-output (MIMO) systems, where the motivation comes from …

To support massive connectivity for sporadically active devices is a challenging task, as the
randomness of the channel and the large number of users lead to enormous increase of …

This letter addresses a problem of downlink pilot allocation for massive multiple-input
multiple-output (MIMO) systems. When a massive MIMO is employed in frequency division …

Compressed sensing has been employed to reduce the pilot overhead for channel
estimation in wireless communication systems. Particularly, structured turbo compressed …

Massive multiple-input-multiple-output (MIMO) is a promising technique for providing
unprecedented spectral efficiency. However, it has been well recognized that the excessive …