Cooperative Interference and Power Allocation in a Bidirectional Untrusted Relay Network With Channel Estimation Errors | Zendy

Lihua Gong | Zendy; Xiaoxiu Ding | Zendy; Qibiao Zhu | Zendy; Nanrun Zhou | Zendy

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Cooperative Interference and Power Allocation in a Bidirectional Untrusted Relay Network With Channel Estimation Errors

Author(s) -

Lihua Gong,

Xiaoxiu Ding,

Qibiao Zhu,

Nanrun Zhou

Publication year - 2018

Publication title -

ieee access

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.587

H-Index - 127

ISSN - 2169-3536

DOI - 10.1109/access.2018.2868500

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

The secure communication of a two-way untrusted amplify-and-forward relay network under the imperfect channel state information is investigated. To improve the secrecy of the relay wiretap system, artificial noise is introduced into each source signal. The total and the individual power constraint conditions are considered. To maximize the attainable secrecy rate, an iterative power allocation algorithm is designed under the total power constraint. As a more practical system design, a suboptimal power allocation scheme is proposed. For the sake of comparison, the security performances of the noncooperative interference strategy and the one-way cooperative interference strategy are also investigated. Simulation results demonstrate that the proposed bidirectional cooperative interference schemes perform better in the secrecy rate of communication system.

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