首页|Security-reliability analysis in uplink cognitive satellite-terrestrial networks with LEO relaying☆
Security-reliability analysis in uplink cognitive satellite-terrestrial networks with LEO relaying☆
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NETL
NSTL
Elsevier
This paper investigates the security and reliability performance of hybrid cognitive satellite-terrestrial networks employing a Low Earth Orbit (LEO) satellite as a decode-and-forward (DF) relay. The terrestrial user (TU) operates within an underlay cognitive radio (CR) network, where the primary user (PU) shares its spectrum with the TU while imposing interference power constraints to protect its quality-of-service. To counteract eavesdropping from a terrestrial adversary, the TU incorporates artificial noise (AN) into its transmission, creating a tradeoff between security and reliability. The TU-to-LEO and TU-to-PU links are modeled using Shadowed Rician and Nakagami-m fading, respectively. Key performance metrics, including the outage probability (OP) and intercept probability (IP), are analyzed under varying system parameters such as power-splitting factor, channel conditions, and interference thresholds. Analytical results are validated through Monte Carlo simulations, and simplified approximations are presented for practical implementation. Results demonstrate the efficacy of the proposed approach in balancing security and reliability.
Hybrid terrestrial-satellite networksUnderlay cognitive radio networksSecurity-reliability tradeoffARTIFICIAL NOISECOMMUNICATIONOPTIMIZATION
NETL
NSTL
Elsevier
