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International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)

On the Secrecy Analysis of Satellite-Terrestrial Communication Link over Gamma–shadowed Ricean Fading Channels

Jelena A. Anastasov, Predrag Ivaniš, Jarosław Makal, Goran T. Djordjević, Dejan Milić

Published Jul 20, 2022• 8 citations
Publisher

Abstract

This paper deals with the physical layer security for the satellite-terrestrial communication system in the presence of an eavesdropper. In the analysis, the satellite has no knowledge of the eavesdropper’s channel state information referring to the passive eavesdropping scenario. The main, as well as the wiretap link, are both characterized as gamma-shadowed Ricean fading channels. The analytical expressions for the secrecy outage probability and the probability of strictly positive secrecy capacity are derived. The secrecy diversity order is also determined. The impact of the fading/shadowing parameters and the average signal-to-noise ratios of the legitimate/illegitimate channels on the aforementioned secrecy metrics is investigated. The results illustrate that specific, either main or wiretap channel nature can enhance system security at the physical layer.

DOI
10.1109/csndsp54353.2022.9908002

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This paper deals with the physical layer security for the satellite-terrestrial communication system in the presence of an eavesdropper. In the analysis, the satellite has no knowledge of the eavesdropper’s channel state information referring to the passive eavesdropping scenario. The main, as well as the wiretap link, are both characterized as gamma-shadowed Ricean fading channels. The analytical expressions for the secrecy outage probability and the probability of strictly positive secrecy capacity are derived. The secrecy diversity order is also determined. The impact of the fading/shadowing parameters and the average signal-to-noise ratios of the legitimate/illegitimate channels on the aforementioned secrecy metrics is investigated. The results illustrate that specific, either main or wiretap channel nature can enhance system security at the physical layer.
This paper investigates the physical layer security (PLS) for the transmission of confidential information over satellite communication systems under unified framework. The generalized shadowed-Rician (SR) fading is utilized to model the satellite channel, and multiple legitimate users are served to cooperatively receive the broadcast signal with a cluster of unauthorized eavesdroppers. In particular, the channel estimation error (CEE) is considered for both the legitimate user and eavesdropping links. Based on the practical channel modeling, we derive the closed-form expressions for the probability of strictly positive secrecy capacity (PSPSC), secrecy outage probability (SOP), and average secrecy capacity (ASC) of the considered satellite communication system in the presence of imperfect channel estimation (ICE), which can provide efficient methods to evaluate the impacts of various propagation parameters on the secrecy performance. In order to obtain further insights into the key parameters on the secrecy performance at high signal-to-noise ratios (SNRs), the asymptotic expressions of the SOP and ASC are also derived. Monte Carlo simulation results are provided to verify the correctness of our performance analysis.
This paper deals with a secure satellite-terrestrial multicast framework over shadowed Rician fading channel, where a satellite communicates with legitimate receivers in the appearance of several eavesdroppers. Our main aim focuses on the protection of this multicast messages from wiretapping. The secrecy performance is analyzed by deriving expressions for two secrecy measures such as the ergodic secrecy multicast capacity and secure outage probability for multicasting in closed-form. The derived mathematical expressions provides an useful insight into how the severity of shadowing affects the secrecy performance of the proposed model. Impact of fading, multicast users and number of eavesdropper on the secure outage behavior is also quantified which provides a trade-off between security and the system parameters. At last a close agreement between the analytical and Monte-Carlo simulation results is presented to validate the derived mathematical expressions.
This work investigates the physical layer secrecy of a multi-antenna hybrid satellite-terrestrial relay networks (HSTRN) with jamming, in which a satellite aims to make communication with a destination user by means of a relay, along with spatially random eavesdroppers.In order to weaken the signals of eavesdroppers, the conventional relay can also generate intentional interference, besides forwarding the received signal.Shadowed-Rician fading is adopted in satellite link, while Rayleigh fading is adopted in terrestrial link, eavesdropper link and jamming link.The analytical and asymptotic formulas for the system secrecy outage probability (SOP) are characterized.Practical insights on the diversity order of the network are revealed according to the asymptotic behavior of SOP at high signal-to-noise ratio (SNR) regime.Then, analysis of the system throughput is examined to assess the secrecy performance.In the end, numerical simulation results are presented to validate the theoretical analysis and point out: (1) The secrecy performance of the considered network is affected by the channel fading scenario, the system configuration; (2) Decrease of the relay coverage airspace can provide better SOP performance; (3) Jamming from the relay can improve secrecy performance without additional network resources.
Secrecy Analysis of Physical Layer over κ−μκ-μκ−μ Shadowed Fading Scenarios
In this paper, the secrecy analysis of physical layer when both the main and wiretap channels undergo κ−μκ-μκ−μ shadowed fading channel is investigated. In particular, the average secrecy capacity (ASC), secure outage probability (SOP), the lower bound of SOP (SOPL^LL), and the probability of strictly positive secrecy capacity (SPSC) are derived by using the classic Wyner's wiretap model. Two different scenarios for the fading parameters, i.e., μμμ and mmm which represents the shadowing impact have been studied. These parameters are chosen first as arbitrary numbers, thus the performance metrics are expressed in single infinite series with multivariate Meijer GGG-function. In the second scenario, both the aforementioned fading parameters are assumed to be integer numbers in order to obtain the derived results in simple exact closed-form analytic mathematically tractable expressions. The numerical results of this analysis are verified via Monte Carlo simulations.
The article presents an analysis of the physical layer security of a wireless communication system functioning in the presence of multipath fading and a wiretap. Under the assumption of the equal propagation conditions (both for the legitimate receiver and the eavesdropper) described by the shadowed Beaulieu–Xie model, a closed-form expression for the secrecy outage probability was derived. The correctness of the obtained expression was numerically verified via comparison with the direct numerical integration. The truncated version of the obtained expression was analyzed for various channel parameters to establish the requirements for numerically efficient implementation (in terms of the number of summands delivering the desired precision). An in-depth study of the secrecy outage probability dependence from all the possible channel parameters for different fading scenarios was performed, including heavy fading and light fading, with and without strong dominant and multipath components. The performed research demonstrated the existence of the secrecy outage probability non-uniqueness with the respect to the average signal-to-noise ratio in the main channel and the relative distance between the legitimate and wiretap receivers.
In this paper, we study the physical layer secrecy performance of a hybrid satellite and free-space optical (FSO) cooperative system. The satellite links are assumed to follow the shadowed-Rician fading distribution, and the channel of the terrestrial link between the relay and destination is assumed to experience the gamma-gamma fading. For the FSO communications, the effects of different types of detection techniques (i.e., heterodyne detection and intensity modulation with direct detection) as well as the pointing error are considered. We derive exact analytical expressions for the average secrecy capacity and secrecy outage probability (SOP) for both cases of amplify-and-forward (AF) and decode-and-forward (DF) relaying. The asymptotic analysis for the SOP is also conducted to provide more insights on the impact of FSO and satellite channels on secrecy performance. It is found that with the AF with fixed gain scheme, the secrecy diversity order of the investigated system is only dependent on the channel characteristics of the FSO link and the FSO detection type, whereas the secrecy diversity is zero when the relay node employs DF or AF with variable-gain schemes.