Journal ArticleDOI
Transmit Antenna Selection for Security Enhancement in MIMO Wiretap Channels
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TLDR
It is proved that under the proposed protocols, the secrecy outage probability and the ε-outage secrecy capacity improve with increasing NA, as well as the secrecy diversity order and the secrecy array gain.Abstract:
We propose and analyze transmit antenna selection (TAS) to enhance physical layer security in a wiretap channel with NA antennas at the transmitter, NB antennas at the receiver, and NE antennas at the eavesdropper. We focus on the practical scenario where the transmitter does not have any channel state information (CSI) of the eavesdropper's channel. The transmitter selects a single antenna that maximizes the instantaneous signal-to-noise ratio (SNR) at the receiver. The receiver and the eavesdropper employ either maximal-ratio combining (MRC) or selection combining (SC) to combine the received signals. For the proposed protocols, we derive new closed-form expressions for the probability of non-zero secrecy capacity. We consider Nakagami-m fading with non-identical fading parameters of the main channel, mB, and of the eavesdropper's channel, mE. Next, we derive new closed-form expressions for the exact secrecy outage probability, based on which the e-outage secrecy capacity is characterized. Based on the exact expressions, we derive the asymptotic secrecy outage probability which accurately reveals the secrecy diversity order and the secrecy array gain. We confirm that the proposed protocols achieve identical secrecy diversity orders of NANBmB. An interesting conclusion is reached that this diversity order is independent of NE and mE. Furthermore, we prove that under the proposed protocols, the secrecy outage probability and the e-outage secrecy capacity improve with increasing NA.read more
Citations
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Proceedings ArticleDOI
Intercept outage probability analysis of cognitive relay networks in presence of eavesdropping attack
TL;DR: The physical-layer security of amplify-and-forward relaying networks under a spectrum-sharing mechanism over independent non-identically distributed Rayleigh fading channels is studied to guarantee the quality-of-service of primary networks.
Journal ArticleDOI
On the secrecy performance of transmit-receive diversity and spatial multiplexing systems.
TL;DR: This paper analyzes the secrecy performance of transmit-receive diversity system and spatial multiplexing systems with zero-forcing equalization and minimum mean-square-error equalization, and derives exact and asymptotic closed-form expressions for the secrecy outage probability of such MIMO systems in a Rayleigh fading environment.
Journal ArticleDOI
Analysis of secrecy outage performance of TAS–CIOD systems over wireless Rayleigh fading channels
TL;DR: It is shown that the CIOD with transmit antenna selection can provide a superior secrecy performance than the Alamouti-OSTBC system with TAS and the Monte Carlo simulation results show the accuracy of the results obtained from theoretical expressions derived.
Proceedings ArticleDOI
Asymptotic Analysis of Average Secrecy Capacity under Transmit Antenna Selection for the MIMO Wiretap Channel
TL;DR: Investigations of employing transmit antenna selection for the MIMO wiretap channel show that the average secrecy capacities increase with the number of antennas when the eavesdropper is at low SNR, but decrease when the listener is at high SNR.
Proceedings ArticleDOI
Secrecy analysis for selection among transmit antennas with unequal average SNR performance
Yujia Hu,Xiaofeng Tao +1 more
TL;DR: A novel TAS scheme based on the limited feedback from both the receiver and the eavesdropper is proposed and analysed, and security is shown to be enhanced although the instantaneous channel state information (CSI) keeps unknown to the transmitter.
References
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Journal ArticleDOI
Communication theory of secrecy systems
TL;DR: A theory of secrecy systems is developed on a theoretical level and is intended to complement the treatment found in standard works on cryptography.
Journal ArticleDOI
The wire-tap channel
TL;DR: This paper finds the trade-off curve between R and d, assuming essentially perfect (“error-free”) transmission, and implies that there exists a Cs > 0, such that reliable transmission at rates up to Cs is possible in approximately perfect secrecy.
Journal ArticleDOI
Broadcast channels with confidential messages
Imre Csiszár,János Körner +1 more
TL;DR: Given two discrete memoryless channels (DMC's) with a common input, a single-letter characterization is given of the achievable triples where R_{e} is the equivocation rate and the related source-channel matching problem is settled.
Journal ArticleDOI
The Gaussian wire-tap channel
TL;DR: Wyner's results for discrete memoryless wire-tap channels are extended and it is shown that the secrecy capacity Cs is the difference between the capacities of the main and wire.tap channels.
Journal ArticleDOI
Wireless Information-Theoretic Security
TL;DR: A practical secure communication protocol is developed, which uses a four-step procedure to ensure wireless information-theoretic security and is shown that the protocol is effective in secure key renewal-even in the presence of imperfect channel state information.