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International Conference on Advanced Technologies for Communications

Effect of imperfect CSI on secrecy performance of cluster based relaying networks

Chu Tien Dung, Vo Nguyen Quoc Bao, Nguyen Luong Nhat, Hồ Văn Cừu

Published Oct 1, 2016• 3 citations
Publisher

Abstract

In this paper, we study two important secure performance metrics of cluster-based multihop relaying networks under the presence of eavesdropper with imperfect main channel estimation. At each hop, partial relay selection is used to improve secure performance. In particular, we derive the system secure outage probability and the probability of non-zero secrecy capacity over Rayleigh fading channels, which are then used to investigate the effect of imperfect channel state information on the system secure performance. Simulations are performed to verify the correctness of the analysis approach.

DOI
10.1109/atc.2016.7764756

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In this paper, we study two important secure performance metrics of cluster-based multihop relaying networks under the presence of eavesdropper with imperfect main channel estimation. At each hop, partial relay selection is used to improve secure performance. In particular, we derive the system secure outage probability and the probability of non-zero secrecy capacity over Rayleigh fading channels, which are then used to investigate the effect of imperfect channel state information on the system secure performance. Simulations are performed to verify the correctness of the analysis approach.
In this paper, we consider secure communication to analyze the physical layer security over a wireless dual-hop relay system in the presence of an eavesdropper with imperfect channel state information (CSI). In this scheme, the first hop from a source to a relay and the second hop from the relay to a destination is subject to Rayleigh fading. The relay will help to forward data signals from the source to the destination based on achievable secrecy rates. The secrecy performance is exactly evaluated by the secrecy outage probability of the achievable secrecy rates. Numerical examples are provided to corroborate the proposed studies.
In this paper, we consider a multi-hop decode-and-forward (DF) relaying transmission in underlay cognitive radio networks. Considering the presence of an eavesdropper that overhears the transmission, we address secure communications of multi-hop wireless communications in terms of physical layer security. In addition, we take in to account the effect of imperfect channel state information (CSI) which is of importance issue in underlay cognitive radio. We analyze the secrecy outage performance of the system over Rayleigh fading channels. In particular, we derive the closed-form expression of the system secrecy outage probability. The analysis results are validated by the Monte-Carlo simulation results. The numerical results show that the imperfect CSI issue does not effect on the security issue of the transmission in underlay cognitive radio networks. On the other hand, the number of hops plays a key role in the physical layer security.
In this paper, we investigate the physical layer security of a multiple-input and multiple-output (MIMO) relay system under imperfect channel state information (CSI). We propose using multiple antennas at the source and destination to increase the signal-to-noise (SNR) gain of the primary channel, thus improving the system's security performance. Exact closed-form expression of the secure outage probability (SOP) and secrecy capacity (SC) are derived and verified by Monte-Carlo simulations. A close match between the theoretical and simulation results confirms the accurateness of our mathematical analysis. We show that the SOP decreases while the SC increases as the average SNR is higher. Furthermore, the saturated minimum and maximum values highly depend on the number of antennas at source and destination, the degree of imperfect CSI, and the location of eavesdropper.
Security performance and the impact of imperfect channel state information (CSI) in underlay cooperative cognitive networks (UCCN) is investigated in this paper. In the proposed scheme, relay R uses non-orthogonal multiple access (NOMA) technology to transfer messages e 1 , e 2 from the source node S to User 1 (U 1 ) and User 2 (U 2 ), respectively. An eavesdropper (E) is also proposed to wiretap the messages of U 1 and U 2 . The transmission's security performance in the proposed system was analyzed and performed over Rayleigh fading channels. Through numerical analysis, the results showed that the proposed system's secrecy performance became more efficient when the eavesdropper node E was farther away from the source node S and the intermediate cooperative relay R. The secrecy performance of U 1 was also compared to the secrecy performance of U 2 . Finally, the simulation results matched the Monte Carlo simulations well.
In this paper, we evaluate system performances of a multi-hop relay protocol with presence of an active eavesdropper. In the proposed protocol, a source attempts to transmit its data to a destination with assistance of multiple intermediate relays. From the eavesdropping Channel State Information (CSI) estimated, the source and relays adjust their transmit power so that the eavesdropper cannot overhear the transmitted data. Moreover, to enhance throughput for the proposed system, Non-Orthogonal Multiple Access (NOMA) technique with a simple power allocation is also proposed. We derive exact closed-form expressions of the Outage Probability (OP) and throughput for the data transmission over Rayleigh fading channel. In addition, when the CSI estimation is imperfect, Intercept Probability (IP) at the eavesdropper is derived. Finally, Monte Carlo simulations are presented to verify the theoretical derivations.
This paper studies the problem of secure dual-hop AF network in the presence of eavesdropper. We study the secrecy performance of partial relay selection with outdated channel state information (CSI). We propose a system secrecy where two sources and destination simultaneously transmit the legitimate and the jamming signal respectively. The selected relay forwards the combined signal to the legitimate receiver and the eavesdropper. We derive a closed-form expression for lower bound on the ergodic secrecy capacity (ESC) under different assumptions of the eavesdropper channel gains. We verify that the system performance is degraded as the correlation coefficient decreases. Simulation results are considered to verify the exactness of the proposed mathematical analysis.