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    Frequency synchronization for OFDM-Based Massive MIMO systems


    Sabeti, Parna and Farhang, Arman and Marchetti, Nicola and Doyle, Linda (2019) Frequency synchronization for OFDM-Based Massive MIMO systems. IEEE Transactions on Signal Processing, 67 (11). pp. 2973-2986. ISSN 1053-587X

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    Abstract

    Massive multiple input multiple output (MIMO) is a key technology in the fifth generation (5G) wireless networks. However, its performance heavily relies on accurate synchronization. Additionally, synchronization can impose an enormous amount of computational complexity to the system. To deal with this issue, in this paper, we propose a low complexity frequency synchronization technique with a high accuracy for the uplink of multi-user orthogonal frequency division multiplexing (OFDM) based massive MIMO systems. First, we propose a carrier frequency offset (CFO) estimation whose computational complexity increases only linearly with respect to the number of base station (BS) antennas. Second, we propose a CFO compensation method that is performed after combining the received signals at the BS antennas, and as a result, its computational complexity is independent of the number of BS antennas. As a third contribution, the effect of the CFO estimation error is studied, and it is proven that by applying our proposed CFO compensation technique, the CFO estimation error causes only a constant phase shift. We then propose an algorithm to efficiently calculate and remove the estimation error. Our simulation results testify the efficacy of our proposed synchronization technique. As it is demonstrated, our proposed synchronization technique leads to a bit error rate (BER) performance that is very close to the one for a fully synchronous system.

    Item Type: Article
    Additional Information: Cite as: P. Sabeti, A. Farhang, N. Marchetti and L. Doyle, "Frequency Synchronization for OFDM-Based Massive MIMO Systems," in IEEE Transactions on Signal Processing, vol. 67, no. 11, pp. 2973-2986, 1 June1, 2019, doi: 10.1109/TSP.2019.2911249.
    Keywords: Frequency; Synchronization; OFDM; MIMO; Systems;
    Academic Unit: Faculty of Science and Engineering > Electronic Engineering
    Faculty of Science and Engineering > Research Institutes > Hamilton Institute
    Item ID: 14070
    Identification Number: https://doi.org/10.1109/TSP.2019.2911249
    Depositing User: Arman Farhang
    Date Deposited: 24 Feb 2021 16:23
    Journal or Publication Title: IEEE Transactions on Signal Processing
    Publisher: IEEE
    Refereed: Yes
    URI:

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