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In this paper, we consider the uplink transmission of a system with one multi-antenna base station (BS) and multiple single antenna user equipments (UEs), which forms a virtual multiple-input multiple-output (MIMO) system. To investigate the capacity maximization problem under per-antenna power constraints, the alternating direction method of multipliers (ADMM) is exploited to obtain the optimal solution...
In this paper, we analyze the ergodic achievable rate of a large uplink multiuser multiple-input–multiple-output (MU-MIMO) system over generalized-$K$ fading channels. In the considered scenario, multiple users transmit their information to a base station equipped with a very large number of antennas. Since the effect of fast fading asymptotically disappears in massive MIMO systems, large-scale fading...
In this paper, the low information-exchange and robust precoding design for distributed antenna systems is investigated, which is of great importance for the new mobile network architecture namely cloud radio access networks (C-RAN). Relying on an interesting low complexity decomposition algorithm, a distributed robust linear minimum mean-square-error (LMMSE) precoding algorithm is proposed. Exploiting...
In this paper, we focus on a two-hop amplify-and-forward (AF) cooperative network, in which one source node equipped with multiple antennas communicates with a single-antenna destination, relying on a single-antenna relay. In order to implement beamforming, channel state information (CSI) is feeded back to the source from relay using random vector quantization (RVQ) codebook. Furthermore, one relay...
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