… We consider a downlink multi-user mmWave massive MIMO communication system that
comprises a BS and U users with single antenna, as shown in Fig. 1. The BS is equipped with a …

… a massive MIMO system based on time division duplexing (TDD) and channel reciprocity, …
a low-complexity algorithm to estimate the sparse geometry of the channel in the angle-delay …

… and sub-channel dimension [3], [4]. In this letter, we find that sub-channels of massive MIMO-…
of subcarriers, while the assumption that sub-channels have exact SCS only holds in small …

… for massive MIMO-OFDM channel … channels, the spatial correlated channel model is
utilized and the SCS method is adopted by utilizing the IBI-free region to perform the channel …

… -complexity sparse channel estimation algorithm for massive MIMO systems. The main idea
is to separate the noise space from the channel tap space. When estimating the channel, it is …

… For convenience, we consider the sparse channel model in the equivalent discrete-time …
channel estimation schemes for FDD massive MIMO systems, where we consider the channel …

… channel estimation problem for IRS-assisted massive MIMO systems. We first present a new
sparse … for the cascaded downlink channel estimation, which exploits the sparsity of massive …

… wideband massive MIMO channel can be represented by a vector that is not simply sparse
… sparsity, we propose low complexity channel estimators for the uplink multiuser scenario that …

… a sparse channel estimation problem for broadband massive multiple-input-multipleoutput
orthogonal frequency division multiplexing (MIMO… of massive MIMO-OFDM channels in the …

… channel matrix assumption. Specifically, we first introduce the SCS of massive MIMO channels
… Then, we prove that channel vectors over sparse channels are asymptotically orthogonal, …