Low‐complexity hybrid precoding for multi‐user massive MIMO systems: a hybrid EGT/ZF approach

Optimal Hybrid Beamforming Design for Millimeter-Wave Massive Multi-User MIMO Relay Systems

“…The hybrid beamforming design can be implemented by two classical structures: sub-connected structure [16], [17], and full-connected structure [18], [19]. Where the subconnected structure means that each RF chain is only connected to an independent subset of antennas, and the full-connected structure means that each RF chain is connected to all antennas.…”

Near‐optimal hybrid precoding for millimeter wave massive MIMO systems via cost‐efficient Sub‐connected structure

“…Our proposed NOIA scheme via full‐connected also outperforms the GEVD‐HBF algorithm in [15], which can prove the proposed scheme is the effective. For sub‐connected structure, the MSE performance of our proposed NOIA algorithm is better than the EGT/ZF hybrid precoding algorithm in [10] and semidefinite relaxation based AltMin hybrid precoding algorithm in [24], which means good MSE performance can be achieved by the proposed NOIA via sub‐connected. Although the performance of our proposed NOIA scheme via sub‐connected structure is not better than that via full‐connected structure, our scheme via sub‐connected is cost‐efficient and energy‐saving.…”

“…For sub‐connected, the proposed algorithm gets better performance than the SIC‐based hybrid precoding algorithm in [9]. Our proposed NOIA algorithm via sub‐connected structure outperforms the algorithm [10], which is also designed for sub‐connected structure using EGT analogue precoder and ZF digital precoder.…”

“…For sub‐connected structure, a hybrid precoding based on successive interference cancellation (SIC), was proved to be capable of providing near‐optimal performance [9]. The main idea in [10] which has low complexity via sub‐connected structure was equal gain transmission (EGT)‐based analogue precoding and zero‐forcing (ZF) digital precoding.…”

Hybrid preprocessing aided spatial modulation in multi‐user massive MIMO systems

“…For a similar system model with single antenna users, a hybrid precoding scheme is proposed in [7] to approach full‐dimensional ZF precoding. Hanif et al [8] consider hybrid analogue–digital beamforming for a multi‐user massive MIMO system. Unlike the most existing work on hybrid precoding design, the authors consider a sub‐connected analogue combining structure at the base station (BS) to reduce the complexity.…”