The quasi-static assumption of channels becomes invalid in a number of emerging
applications of massive multiple-input multiple-output (MIMO) systems with high base station …

This paper addresses downlink channel estimation for frequency division duplex multi-user
massive multiple-input multiple-output systems. Suppose that a base station communicates …

As the array dimension of massive MIMO systems increases to unprecedented levels, two
problems occur. First, the spatial stationarity assumption along the antenna elements is no …

We address the downlink channel estimation problem for massive multiple-input multiple-
output (MIMO) systems in this paper, where the inherit burst-sparsity structure is exploited to …

We propose a novel method for massive multiple-input multiple-output (massive MIMO) in
frequency division duplexing (FDD) systems. Due to the large frequency separation between …

Channel state information (CSI) acquisition is a crucial issue in downlink FDD-based
massive multi-input multioutput (MIMO) networks, where the channel reciprocity is not …

This paper studies the device activity detection problem in a multi-cell massive multiple-input
multiple-output (MIMO) system, in which the active devices transmit signature sequences to …

With perfect channel state information, a huge signal to noise ratio (SNR) gain can be
obtained in massive multiple input multiple output (MIMO) systems. Therefore, massive …

In frequency division duplex massive MIMO systems, one critical challenge is that the
mobiles need to feed back a large downlink channel matrix to the base station, creating …

Multiple-input multiple-output (MIMO) millimeter wave (mmWave) communication is a key
technology for next generation wireless networks. One of the consequences of utilizing a …