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    On Secure Mixed RF-FSO Systems With TAS and Imperfect CSI

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    Type
    Article
    Authors
    Lei, Hongjiang
    Luo, Haolun
    Park, Kihong cc
    Ansari, Imran Shafique
    Lei, Weijia
    pan, Gaofeng
    Alouini, Mohamed-Slim cc
    KAUST Department
    Communication Theory Lab
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Date
    2020
    Online Publication Date
    2020-04-02
    Print Publication Date
    2020-07
    Permanent link to this record
    http://hdl.handle.net/10754/662432
    
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    Abstract
    In this work, we analyze the secrecy outage performance of a dual-hop relay system composed of multipleinput- multiple-output radio-frequency (RF) links and a freespace optical (FSO) link while a multiple-antenna eavesdropper wiretaps the confidential information by decoding the received signals from the source node. The channel state information (CSI) of the RF and FSO links is considered to be outdated and imprecise, respectively. We propose four transmit antenna selection (TAS) schemes to enhance the secrecy performance of the considered systems. The secrecy outage performance with different TAS schemes is analyzed and the effects of misalignment and detection technology on the secrecy outage performance of mixed systems are studied. We derive the closed-form expressions for probability density function (PDF) and cumulative distribution function (CDF) over M´alaga channel with imperfect CSI. Then the closed-form expressions for the CDF and PDF of the equivalent signal-to-noise ratio (SNR) at the legitimate receiver over Nakagami-m and M´alaga channels are derived. Furthermore, the bound of the effective secrecy throughput (EST) with different TAS schemes are derived. Besides, the asymptotic results for EST are investigated by exploiting the unfolding of Meijer’s G-function when the electrical SNR of FSO link approaches infinity. Finally, Monte-Carlo simulation results are presented to testify the correctness of the proposed analysis. The results illustrate that outdated CSI shows a strong effect on the secrecy performance of the mixed RF-FSO systems. In addition, increasing the number of antennas at the source cannot significantly enhance the secrecy performance of the considered systems
    Citation
    Lei, H., Luo, H., Park, K.-H., Ansari, I. S., Lei, W., Pan, G., & Alouini, M.-S. (2020). On Secure Mixed RF-FSO Systems With TAS and Imperfect CSI. IEEE Transactions on Communications, 1–1. doi:10.1109/tcomm.2020.2985028
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    IEEE Transactions on Communications
    DOI
    10.1109/TCOMM.2020.2985028
    arXiv
    1809.01503
    Additional Links
    https://ieeexplore.ieee.org/document/9054980/
    https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9054980
    http://arxiv.org/pdf/1809.01503
    ae974a485f413a2113503eed53cd6c53
    10.1109/TCOMM.2020.2985028
    Scopus Count
    Collections
    Articles; Electrical and Computer Engineering Program; Communication Theory Lab; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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