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

Long, Hang, Xiang, Wei, Wang, Jing, Zhang, Xiaoli, and Wang, Wenbo (2015) Enhancing secrecy capacity of multi-relay wiretap systems with partial channel state information. International Journal of Communications Systems, 28 (12). pp. 1847-1861.

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Distributed precoding has provento 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.

Item ID: 42846
Item Type: Article (Research - C1)
ISSN: 1099-1131
Keywords: channel state information, multi-relay wiretap systems, precoding, secrecy capacity
Funders: Chinese Universities Scientific Fund (CUSF), National Natural Science Foundation, China (NFSC)
Projects and Grants: CUSF 2013RC0116, NFSC 61302088, NFSC 20130005120003
Date Deposited: 16 Jun 2016 13:08
FoR Codes: 09 ENGINEERING > 0906 Electrical and Electronic Engineering > 090699 Electrical and Electronic Engineering not elsewhere classified @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970110 Expanding Knowledge in Technology @ 100%
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