Hybrid Beamforming With Discrete Phase Shifters for Millimeter-Wave Massive MIMO Systems

Hybrid digital and analog beamforming design has been the focus of considerable interest in the context of millimeter-wave massive multiple-input multiple-output systems because such a design can provide a flexible compromise between hardware complexity and system performance. However, most existing...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2017-08, Vol.66 (8), p.7604-7608
Main Author: Chen, Jung-Chieh
Format: Article
Language:English
Subjects:
Algorithm design and analysis
Algorithms
Array signal processing
Baseband
Beamforming
Computer simulation
finite resolution phase shifters
Hardware
Hybrid power systems
Hybrid systems
massive MIMO
Millimeter waves
millimeter-wave
MIMO
MIMO (control systems)
Phase shifters
Precoding
Radio frequency
State of the art
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Summary:Hybrid digital and analog beamforming design has been the focus of considerable interest in the context of millimeter-wave massive multiple-input multiple-output systems because such a design can provide a flexible compromise between hardware complexity and system performance. However, most existing hybrid beamforming designs usually assume that infinite resolution phase shifters (PSs) are available to produce analog beamformers. In a practical sense, the employment of such shifters with arbitrary phase is infeasible or, at least, is expensive because of hardware limitations. We propose an iterative hybrid transceiver design algorithm, where PSs can only supply discrete phase adjustments, to facilitate low-cost implementation of the analog beamformers via finite resolution PSs while maximizing spectral efficiency. Simulation results reveal that the performance of the proposed algorithm with low-resolution PSs is close to that of the state-of-the-art algorithm with infinite resolution PSs.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2017.2670638