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    1-bit Phase Shifters for Large-Antenna Full-Duplex mmWave Communications

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    Author
    da Silva, José Mairton Barros Jr.; Sabharwal, Ashutosh; Fodor, Gábor; Fischione, Carlo
    Date
    2020
    Abstract
    Millimeter-wave using large-antenna arrays is a key technological component for the future cellular systems, where it is expected that hybrid beamforming along with quantized phase shifters will be used due to their implementation and cost efficiency. In this paper, we investigate the efficacy of full-duplex mmWave communication with hybrid beamforming using low-resolution phase shifters. We assume that the self-interference can be sufficiently cancelled by a combination of propagation domain and digital self-interference techniques, without any analog self-interference cancellation. We formulate the problem of joint self-interference suppression and downlink beamforming as a mixed-integer nonconvex joint optimization problem. We propose LowRes, a near-to-optimal solution using penalty dual decomposition. Numerical results indicate that LowRes using low-resolution phase shifters perform within 3% of the optimal solution that uses infinite phase shifter resolution. Moreover, even a single quantization bit outperforms half-duplex transmissions, respectively by 29% and 10% for both low and high residual self-interference scenarios, and for a wide range of practical antenna to radio-chain ratios. Thus, we conclude that 1-bit phase shifters suffice for full-duplex millimeter-wave communications, without requiring any additional new analog hardware.
    Citation
    da Silva, José Mairton Barros Jr., Sabharwal, Ashutosh, Fodor, Gábor, et al.. "1-bit Phase Shifters for Large-Antenna Full-Duplex mmWave Communications." IEEE Transactions on Wireless Communications, 19, no. 10 (2020) IEEE: 6916-6931. https://doi.org/10.1109/TWC.2020.3006959.
    Published Version
    https://doi.org/10.1109/TWC.2020.3006959
    Type
    Journal article
    Publisher
    IEEE
    Citable link to this page
    https://hdl.handle.net/1911/109539
    Rights
    This work is licensed under a Creative Commons Attribution 4.0 License.
    Link to License
    https://creativecommons.org/licenses/by/4.0/
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    • ECE Publications [1341]
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    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
    Mailing Address: MS-44, P.O.BOX 1892, Houston, Texas 77251-1892
    Site Map