… precoding matrix, which we call a compensation matrix. We analyze the SLNR loss due to
the proposed hybrid precoding compared to fully digital precoding, … if the channel is spatially …

… relying both on the channel’s covariance matrix and on the AoD … covariance matrix associated
with the channel matrix for each user on each subcarrier, which shows that the covariance …

… the precoder/combiner with implicit channel information … online hybrid combiners in MU-MIMO
[7] without explicit channel … In this work we propose an adaptive MU hybrid precoding …

… channel covariance matrix in the uplink can be used for the hybrid precoding design in the
downlink due to channel … uplink spatial channel covariance can also be used for the downlink …

… propose a hybrid statistical-instantaneous feedback mechanism where the users are separated
into two classes of feedback design based on their channel covariance. Under the hybrid …

… Using the estimated channel, this paper proposes a new hybrid analog/digital precoding …
N(m, R) is a complex Gaussian random vector with mean m and covariance R. E [·] is used …

… super-resolution spatial channel covariance estimation techniques for … hybrid precoding
constraint. Two structurebased optimization techniques including low-rank structured covariance …

… [34], and then hybrid precoding and channel estimation strategies were proposed as well.
In [35], an analytical sum-rate expression for generic channel covariance-based beamforming …

… We use the sub-6 GHz channel covariance as an out-of-band side information for mmWave
… 2) a hybrid analog–digital architecture at mmWave, we propose an out-ofband covariance …

… hybrid precoding algorithm for mmWave systems with large antenna arrays at both the base
station (BS) and mobile station (… channel covariance matrix observed by the BS and MS. The …