… traffic and delay-sensitive applications, most cellular systems today employ FDD [2], [3]. …
in a FDD massive MIMO system, one option is to explore possible underlying channel structure …

… Since the transformation matrix is determined by the structure of the antenna array, we …
length of training sequence, massive MIMO channels are hardly sparse enough to directly apply …

… acquire the CSI in FDD massive MIMO system is based on … the DL channel estimation in FDD
massive MIMO system. This is … this channel structure, a hybrid training structure is proposed …

… For example, compressed sensing was introduced to estimate the sparse channel through a
… -OFDM scenario, we design the codebook in accordance with the structure of a component …

… and UL feedback overhead in FDD massive MIMO systems. Some of these techniques rely
… rank or sparse structures to reduce DL training overhead, since in a massive MIMO scenario…

… overheads by exploiting the sparse structure of the massive MIMO channel. In … admit a
sparse representation in the beam-space domain (eg, see [21], [22]). Building on this idea, a large …

… has a sparse or an approximate sparse representation on the virtual angular domain. …
issue in FDD massive MIMO systems. In this paper, we exploited the low-rank structure of the …

… MIMO systems. However, to obtain the fine-grain spatial channel structures in massive MIMO
systems… His research interests include sparse signal processing, massive MIMO, millimeter-…

… exploit the structures in the channel sparsity to give a robust channel estimation. In this
paper, we investigate the downlink channel estimation problem for FDD massive MIMO system …

… sparse representation of massive MIMO systems with an arbitrary 2D-array geometry, and
we propose an efficient sparse … model guarantees a jointly sparse structure from the angular …