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    Improper Gaussian Signaling for Hardware Impaired Multihop Full-Duplex Relaying Systems

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    Type
    Article
    Authors
    Javed, Sidrah cc
    Amin, Osama
    Shihada, Basem cc
    Alouini, Mohamed-Slim cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Computer Science Program
    Date
    2018-12-04
    Online Publication Date
    2018-12-04
    Print Publication Date
    2019-03
    Permanent link to this record
    http://hdl.handle.net/10754/630283
    
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    Abstract
    In this paper, we analyze the performance degradation of a multi-hop decode-and-forward full-duplex relaying (MH-DF-FDR) system caused by the residual self-interference (RSI) and hardware distortions (HWD) imposed by the FDR operation and imperfect hardware, respectively. In addition, we study the benefits of employing improper Gaussian signaling (IGS) in the MH-FDR system. Different from the traditional symmetric signaling scheme, i.e., proper Gaussian signaling (PGS), IGS has non-zero pseudo-variance that can limit the impact of RSI and HWD in the MH-FDR system. To evaluate the system performance gain using IGS, first we express the end-to-end achievable rate of the MH system as the minimum rate supported by all participating links. Then, we optimize the pseudo-variance of all participating transmitters including source and relays to compensate the interference impact and improve the end-to-end achievable rate. We propose two network optimization schemes based on the system characteristics i.e. joint optimization framework and distributed optimization scenario. Interestingly, IGS-based scheme outperforms its counterpart PGS-based scheme, especially at higher interference-to-noise ratio. Our findings reveal that using IGS in single-user detection systems that suffer from both RSI and HWD can effectively mitigate the degradation in the achievable rate performance.
    Citation
    Javed S, Amin O, Shihada B, Alouini M-S (2018) Improper Gaussian Signaling for Hardware Impaired Multihop Full-Duplex Relaying Systems. IEEE Transactions on Communications: 1–1. Available: http://dx.doi.org/10.1109/tcomm.2018.2884986.
    Sponsors
    This work was funded under grant #AT-35-59 from King Abdulaziz City of Science and Technology.
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    IEEE Transactions on Communications
    DOI
    10.1109/tcomm.2018.2884986
    Additional Links
    https://ieeexplore.ieee.org/document/8558593
    ae974a485f413a2113503eed53cd6c53
    10.1109/tcomm.2018.2884986
    Scopus Count
    Collections
    Articles; Computer Science Program; Electrical Engineering Program; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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