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Frontiers of Information Technology & Electronic Engineering

Correlated channel model-based secure communications in dual-hop wireless communication networks

Zhenhua, Yuan, Chen, ■ Xiang, Cheng Cheng, Guocheng, Lv, Liu-qing, Yang, Ye, Jin Jin

Published Jan 1, 2017• 1 citation
OpenAlex

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Correlated channel model-based secure communications in dual-hop wireless communication networks

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This article is focused on secure relay beamformer design with a correlated channel model in the relay-eavesdropper network. In this network, a single-antenna source-destination pair transmits secure information with the help of an amplify-and-forward (AF) relay equipped with multiple antennas, and the legitimate and eavesdropping channels are correlated. The relay cannot obtain the instantaneous channel state information (CSI) of the eavesdropper, and has only the knowledge of correlation information between the legitimate and eavesdropping channels. Depending on this information, we derive the conditional distribution of the eavesdropping channel. Two beamformers at the relay are studied for the approximate ergodic secrecy rate: (1) the generalized match-and-forward (GMF) beamformer to maximize the legitimate channel rate, and (2) the general-rank beamformer (GRBF). In addition, one lower-bound-maximizing (LBM) beamformer at the relay is discussed for maximizing the lower bound of the ergodic secrecy rate. We find that the GMF beamformer is the optimal rank-one beamformer, that the GRBF is the iteratively optimal beamformer, and that the performance of the LBM beamformer for the ergodic secrecy rate gets close to that of the GRBF for the approximate secrecy rate. It can also be observed that when the relay has lower power or the channel gain of the second hop is low, the performance of the GMF beamformer surpasses that of the GRBF. Numerical results are presented to illustrate the beamformers’ performance.

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Evaluating Physical Layer Security in Dual-Hop Relay Networks over Composite Rayleigh-Gamma Fading Channels

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With the growing importance of security in advanced communication systems, researchers are exploring innovative strategies to enhance the performance of next-generation wireless networks. This paper proposes a relay-based dual-hop network operating over composite Rayleigh-Gamma fading channels, designed to enhance security against eavesdropping attacks. We derive novel analytical expressions for the secrecy outage probability in terms of Meijer’s G and Fox’s H functions to evaluate the secrecy performance. To validate the analytical results, Monte Carlo simulation is performed. The numerical analysis demonstrates that system security improves significantly with higher fading parameters and reduced path loss in the main communication channel. However, the system’s vulnerability increases as the fading parameter of the eavesdropping channel grows, highlighting the critical interplay between channel conditions and security performance.

International Conference on Electrical, Computer and Communication Engineering•Feb 13, 2025•2 citations
This article is focused on secure relay beamformer design with a correlated channel model in the relay-eavesdropper network. In this network, a single-antenna source-destination pair transmits secure information with the help of an amplify-and-forward (AF) relay equipped with multiple antennas, and the legitimate and eavesdropping channels are correlated. The relay cannot obtain the instantaneous channel state information (CSI) of the eavesdropper, and has only the knowledge of correlation information between the legitimate and eavesdropping channels. Depending on this information, we derive the conditional distribution of the eavesdropping channel. Two beamformers at the relay are studied for the approximate ergodic secrecy rate: (1) the generalized match-and-forward (GMF) beamformer to maximize the legitimate channel rate, and (2) the general-rank beamformer (GRBF). In addition, one lower-bound-maximizing (LBM) beamformer at the relay is discussed for maximizing the lower bound of the ergodic secrecy rate. We find that the GMF beamformer is the optimal rank-one beamformer, that the GRBF is the iteratively optimal beamformer, and that the performance of the LBM beamformer for the ergodic secrecy rate gets close to that of the GRBF for the approximate secrecy rate. It can also be observed that when the relay has lower power or the channel gain of the second hop is low, the performance of the GMF beamformer surpasses that of the GRBF. Numerical results are presented to illustrate the beamformers’ performance.
With the growing importance of security in advanced communication systems, researchers are exploring innovative strategies to enhance the performance of next-generation wireless networks. This paper proposes a relay-based dual-hop network operating over composite Rayleigh-Gamma fading channels, designed to enhance security against eavesdropping attacks. We derive novel analytical expressions for the secrecy outage probability in terms of Meijer’s G and Fox’s H functions to evaluate the secrecy performance. To validate the analytical results, Monte Carlo simulation is performed. The numerical analysis demonstrates that system security improves significantly with higher fading parameters and reduced path loss in the main communication channel. However, the system’s vulnerability increases as the fading parameter of the eavesdropping channel grows, highlighting the critical interplay between channel conditions and security performance.