Hybrid Block Diagonalization for Massive Multiuser MIMO Systems

By Weiheng Ni, Xiaodai Dong. IEEE Transactions on Communications, 2015

353 citations recorded by the source corpus.

For a massive multiple-input multiple-output (MIMO) system, restricting the number of RF chains to far less than the number of antenna elements can significantly reduce the implementation cost compared to the full complexity RF chain configuration. In this paper, we consider the downlink communication of a massive multiuser MIMO (MU-MIMO) system and propose a low-complexity hybrid block diagonalization (Hy-BD) scheme to approach the capacity performance of the traditional BD processing method. We aim to harvest the large array gain through the phase-only RF precoding and combining and then digital BD processing is performed on the equivalent baseband channel. The proposed Hy-BD scheme is examined in both the large Rayleigh fading channels and millimeter wave (mmWave) channels. A performance analysis is further conducted for single-path channels and large number of transmit and receive antennas. Finally, simulation results demonstrate that our Hy-BD scheme, with a lower implementation and computational complexity, achieves a capacity performance that is close to (sometimes even higher than) that of the traditional high-dimensional BD processing.

Subfields: Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/98344562dfd04b54e8a335fa5056397bf84a1ae6

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Citations in the corpus

Hybrid Beamforming for Massive MIMO - A Survey (2016, methodology): “Extending to the situation where the UE is also equipped with a hybrid structure for MU-MIMO, [16] first constructs the RF combiner by selecting the strongest receive beams from the Fourier codebook to maximize the Frobenius norm of the combiner-projected channel.”
A Survey on Hybrid Beamforming Techniques in 5G: Architecture and System Model Perspectives (2018, methodology): “hybrid precoder and combiner in a MU-MIMO system [113].”