Secure Relay Beamforming With Imperfect Channel Side Information

Wang, Xiyuan; Wang, Kun; Zhang, Xian-Da

doi:10.1109/tvt.2012.2230657

Cited by 102 publications

(91 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It aims at maximizing the joint secrecy rate of two secondary nodes. We notice that bibliographies [17,18] study the optimization of secure rate under relay power constraint. This paper expands its research field in the condition of multiple relay CRN, which makes theoretical analysis more complicated.…”

Section: Introductionmentioning

confidence: 99%

Joint Beamforming and the Artificial Noise Security Scheme Based on Successive Convex Approximation in Multi-relay Cognitive Network

Xie¹,

Xie²,

Shu³

et al. 2017

Proceedings of the International Conference on Computer Networks and Communication Technology (CNCT 2016)

View full text Add to dashboard Cite

Abstract. To solve the transmission problemof physical layer security(PLS) in relay cognitive radio network (CRN), this paper investigates the PLS transmission scheme of multiple relays CRN, which contains two pairs of secondary nodes without direct link each other. Compared with the model that consists ofa pair of secondary node users and a single relay in terms of theoretical analysis and optimization, the proposed scheme is more complicated. To maximizethe joint secret rate of the secondary users,power allocation of the twosecondarysource transmission node withbeamforming andartificial noise assist (PBNAS) is obtained. Furthermore, exploiting the semidefinite programming theory (SDR) and the successive convex approximation (SCA) method, the original complex nonconvex problem is transformed into a convex optimization problem, and the iterative procedure is summarized.Finally, the security transmission rate versus different number relays andrelays total power is simulated. The simulation results show that the security performance of the PBNAS scheme is the best.

show abstract

Section: Introductionmentioning

confidence: 99%

Joint Beamforming and the Artificial Noise Security Scheme Based on Successive Convex Approximation in Multi-relay Cognitive Network

Xie¹,

Xie²,

Shu³

et al. 2017

Proceedings of the International Conference on Computer Networks and Communication Technology (CNCT 2016)

View full text Add to dashboard Cite

show abstract

“…In contrast, the works of [18][19][20][21][22][23][24][25][26] considered a joint cooperative relaying and jamming scheme, where some of the relays cooperate to forward the source signal and simultaneously the other relays cooperate to send jamming signals to confuse the eavesdroppers. Such joint scheme is especially useful when the number of relays is large.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, it is important to develop relay designs that are robust to CSI errors. Works along these lines include [29][30][31][32][33][34][35] which consider the scenario with no relays and [24][25][26][27] which consider the scenario with relays. As compared with the transmission design in the former scenario, the robust secure relay design is more difficult due to noise amplification at relays.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, to the best of the authors' knowledge, existing robust designs for secure AF relay networks are few. For example, the works [24,25] considered the stochastic CSI error model which is applicable when the imperfect CSI is mainly due to errors in channel estimation and tried to minimize the outage probability of the secrecy rate. The works [26,27] considered the deterministically bounded CSI error model which is applicable when the CSI error is dominated by quantization errors and tried to compute the maximal achievable worst-case secrecy rate.…”

Section: Introductionmentioning

confidence: 99%

“…As in our conference paper [27], we consider a more general joint cooperative relaying and jamming scheme, where each relay forwards the source signal and transmits jamming signals simultaneously. We should note that the works [24][25][26] considered a different joint cooperative relaying and jamming scheme, where some of the relays cooperate to forward the source signal while the other relays cooperate to send jamming signals to confuse the eavesdroppers.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Robust transmit design for secure AF relay networks with imperfect CSI

Chen

et al. 2016

J Wireless Com Network

View full text Add to dashboard Cite

This paper studies robust transmit design for secure AF relay networks with imperfect channel state information (CSI). Two CSI error models, deterministically bounded error model and stochastic error model, are considered. In order to use the power at relays more efficiently, a joint cooperative relaying and jamming scheme is considered, where relays cooperate to forward the source signal and simultaneously they cooperate to send jamming signals to confuse the eavesdroppers. In this joint cooperative relaying and jamming framework, we address the robust joint optimization of the relay weights and the input covariance matrix of jamming signals for secrecy rate maximization (SRM), under both total and individual relay power constraints. Specifically, for the case of deterministically bounded error model, where the CSI error can be specified by an uncertainty set, we maximize the worst-case secrecy rate. While for the case of stochastic error model, where the probability distribution of the CSI error is Gaussian, we maximize the outage constrained secrecy rate. The challenge of these considered SRM-based optimizations lies in their non-convexity. This paper shows that such SRM-based optimization can be solved in a convex fashion and via solving a sequence of semidefinite programs (SDPs). Numerical results are presented to show the efficacy of the proposed scheme.

show abstract

Enhancing secrecy capacity of multi‐relay wiretap systems with partial channel state information

Long

Wang

et al. 2014

Int J Communication

View full text Add to dashboard Cite

Distributed precoding has proven to be capable of enhancing the secrecy capacity of the multi-relay wiretap system. An iterative distributed precoding and channel state information (CSI) sharing scheme can be used to reduce the CSI overhead at each relay node. However, in practical applications, the CSI of each relay node cannot be perfectly known to themselves, especially that of the relay-eavesdropper channels. Thus, partial CSI for the relay-eavesdropper links is assumed, and the corresponding distributed precoding and CSI sharing schemes are investigated. Under the assumption that the average value of the relay-eavesdropper channel is known at each relay node, an extended iterative distributed precoding and CSI sharing scheme is proposed. Simulation results demonstrate that with the increase of the power ratio of the constant part to the random part of the relay-eavesdropper channels, the proposed scheme with partial CSI performs increasingly close to the one with perfect CSI in secrecy capacity. Figure 2. Secrecy capacity of the multi-relay system with M D 2.the Rician channel than with the Rayleigh channel. The proposed ITP with the average channel values performs better with the increase of K. The gap between the ITP schemes with perfect and partial CSI narrows with the increase of K, because the random parts of the R i -E channels become smaller.The secrecy capacity results are plotted in Figure 3 with M D 3. The observation from Figure 3 is similar to that from Figure 2. The difference between ITP with perfect and partial CSI is negligible as can be seen from Figure 3(a). The relationship among the ITP schemes with different CSI assumptions can be clearly observed from Figure 3(c). When K is small and the R i -E channels are Figure 3. Secrecy capacity of the multi-relay system with M D 3.almost unknown, the ITP w/ AV scheme has similar performance as that without the R i -E CSI. If K is larger than 10 dB, the gap between ITP with perfect and partial CSI is negligible.The results in Figures 2(c) and 3(c) demonstrate that the proposed ITP schemes with partial CSI is suited for the Rician channel with the average channel values available at the relay nodes. The power ratio K between the constant and random parts affects the performance of the proposed scheme. As shown in Figures 2(c) and 3(c), if K < 4 dB, namely, each relay node almost knows nothing about the related R i -E channel, the ITP w/AV scheme performs close to that without the eavesdropper information. On the other hand, if K > 10 dB, the proposed scheme with partial CSI is similar to that with perfect CSI.

show abstract

Secure Relay Beamforming With Imperfect Channel Side Information

Cited by 102 publications

References 29 publications

Joint Beamforming and the Artificial Noise Security Scheme Based on Successive Convex Approximation in Multi-relay Cognitive Network

Joint Beamforming and the Artificial Noise Security Scheme Based on Successive Convex Approximation in Multi-relay Cognitive Network

Robust transmit design for secure AF relay networks with imperfect CSI

Enhancing secrecy capacity of multi‐relay wiretap systems with partial channel state information

Contact Info

Product

Resources

About