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A Computationally Efficient Joint Cell Search and Frequency Synchronization Scheme for LTE Machine-Type Communications

Department of Computer Engineering, Sejong University, Gwangjin-gu, Gunja-dong 98, Seoul 05006, Korea
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Symmetry 2019, 11(11), 1394; https://doi.org/10.3390/sym11111394
Received: 18 October 2019 / Revised: 5 November 2019 / Accepted: 8 November 2019 / Published: 11 November 2019
The key features for future machine-type communication cellular systems facilitate low-power, low-cost, narrow-band, and wide-area systems. One of the challenging tasks to realize these requirements in machine-type communication cellular networks is a low-cost initial synchronization. To address this issue, this paper presents a reduced-complexity joint estimation of integer carrier frequency offset and cell identity for machine-type communication in the long-term evolution system. Using the conjugate property of a primary synchronization signal, joint search space of a number of hypotheses is reduced by two-thirds, facilitating low-complexity detection. The performance is assessed in terms of theoretical probability of detection failure. Simulation results confirm that the proposed estimation scheme achieves approximately the same performance as the conventional scheme with notably low complexity. View Full-Text
Keywords: long-term evolution; machine-type communication; cell search; synchronization signal long-term evolution; machine-type communication; cell search; synchronization signal
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Jung, Y.-A.; Shin, D.; You, Y.-H. A Computationally Efficient Joint Cell Search and Frequency Synchronization Scheme for LTE Machine-Type Communications. Symmetry 2019, 11, 1394.

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