Precoding and cooperative jamming in multi-antenna two-way relaying wiretap systems without eavesdroppers' channel state information

Long, Hang, Xiang, Wei, and Li, Yuli (2017) Precoding and cooperative jamming in multi-antenna two-way relaying wiretap systems without eavesdroppers' channel state information. IEEE Transactions on Information Forensics and Security, 12 (6). pp. 1309-1318.

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Abstract

This paper studies secrecy communications in a multi-antenna two-way relaying wiretap system. Each source node transmits user and jamming signals with distinct precoding vectors. Based on the assumption that the channel state information relating to the eavesdropper is unknown by the legitimate nodes, new precoding design algorithms are proposed. The jamming signals are designed to ensure that minimum interference is perceived by the other source node. The precoding vectors of the user signals are designed to form two parallel vectors in the equivalent wiretap channel at the eavesdropper. Two algorithms are proposed based upon the zero-forcing and matched-filter schemes, which are dubbed the selective zero-forcing-based precoding (SZFP) and matched-filter-based precoding schemes. Analytical and simulation results are presented to demonstrate that the SZFP algorithm is more applicable when the eavesdropper is equipped with a large number of antennas or the eavesdropper’s channels are in good condition.

Item ID: 48048
Item Type: Article (Research - C1)
ISSN: 1556-6013
Keywords: security; two-way relaying systems; cooperative jamming; precoding; channel state information
Funders: National Natural Science Foundation of China (NSFC)
Projects and Grants: NSCF Project 61302088, NSCF grant #20130005120003 & #2014ZD03-03
Date Deposited: 28 Mar 2017 23:30
FoR Codes: 10 TECHNOLOGY > 1005 Communications Technologies > 100510 Wireless Communications @ 100%
SEO Codes: 89 INFORMATION AND COMMUNICATION SERVICES > 8901 Communication Networks and Services > 890103 Mobile Data Networks and Services @ 100%
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