Cooperative jamming and power allocation with untrusty two-way relay nodes

Long, Hang, Xiang, Wei, Wang, Jing, Zhang, Yueying, and Wang, Wenbo (2014) Cooperative jamming and power allocation with untrusty two-way relay nodes. IET Communications, 8 (13). pp. 2290-2297.

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Abstract

This study investigates the security of the two-way relaying system with untrusty relay nodes. Cooperative jamming schemes are considered for bi-directional secrecy communications. The transmit power of each source node is divided into two parts corresponding to the user and jamming signals, respectively. Two different assumptions of the jamming signals are considered. When the jamming signals are a priori known at the two source nodes, closed-form power allocation expressions at two source nodes are derived. Under the assumption of unknown jamming signals, it is proven that the cooperative jamming is useless for the system secrecy capacity, because that all the power should be allocated to the user signals at each source node. Relay selection is also investigated based on the analysis of cooperative jamming. Simulation results are presented to compare the system secrecy capacities under the two jamming signal assumptions.

Item ID: 43296
Item Type: Article (Research - C1)
ISSN: 1751-8636
Keywords: relay networks (telecommunication), cooperative communication, jamming, closed-form power allocation expressions, bi-directional secrecy communications, cooperative jamming scheme, two-way relaying system
Funders: Natural Science Foundation of China (NSFC), Research Fund for the Doctoral Program of Higher Education (RFDPHE), Chinese Universities Scientific Fund (CUSF)
Projects and Grants: NSFC project 61302088, RFDPHE grant no. 20130005120003, CUSF grant no. 2013RC0116
Date Deposited: 24 Feb 2016 07:47
FoR Codes: 09 ENGINEERING > 0906 Electrical and Electronic Engineering > 090699 Electrical and Electronic Engineering not elsewhere classified @ 100%
SEO Codes: 89 INFORMATION AND COMMUNICATION SERVICES > 8901 Communication Networks and Services > 890199 Communication Networks and Services not elsewhere classified @ 100%
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