EFFICIENT HYBRID BEAMFORMING DESIGN IN MMWAVE MASSIVE MU-MIMO DF RELAY SYSTEMS WITH THE MIXED-STRUCTURE
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Date
2021-04-16
Authors
Han, Meng
Du, Jianhe
Zhang, Yang
Li, Xingwang
Rabie, Khaled M.
Nauryzbayev, Galymzhan
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE Access
Abstract
In this paper, we consider the decode-and-forward (DF) relay system in millimeter-wave
(mmWave) massive multiple-input multiple-output (MIMO) systems, and propose a hybrid beamforming
design method for the mixed structure, which contains the fully-connected and sub-connected structures. To satisfy constant-modulus and block-diagonalization (BD) constraints, the analog beamforming is
designed by the idea of sorted successive interference cancellation (SSIC). More specifically, the proposed
method first sorts the capacities of different analog sub-channels in descending order, and then designs the
analog beamforming serially according to the order of the capacities. To efficiently mitigate the inner-user
and inter-user interference, we propose a modified baseband BD technology to reduce the information loss
in digital beamforming design, thereby improving the system capacity. In addition, the proposed hybrid
beamforming algorithm is designed by considering both uniform linear arrays (ULAs) and uniform planar
arrays (UPAs). Simulation results demonstrate that the proposed hybrid beamforming design scheme can
obtain good performance in terms of the achievable sum-rate and power efficiency in ULAs and UPAs.
Description
Keywords
Type of access: Open Access, DF relay, mmWave, massive MIMO, hybrid beamforming, mixed structure
Citation
Han, M., Du, J., Zhang, Y., Li, X., Rabie, K. M., & Nauryzbayev, G. (2021). Efficient Hybrid Beamforming Design in mmWave Massive MU-MIMO DF Relay Systems With the Mixed-Structure. IEEE Access, 9, 66141–66153. https://doi.org/10.1109/access.2021.3073847