Physical-Layer Security for Full Duplex Communications With Self-Interference Mitigation

In this paper, we design transmit beamforming for a full duplex base station (FD-BS) considering both self-interference mitigation and physical-layer security. The proposed design is formulated as minimizing the power consumption of FD-BS under different signal-to-interference-and-noise-ratio (SINR)...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2016-01, Vol.15 (1), p.329-340
Main Authors: Zhu, Fengchao, Gao, Feifei, Zhang, Tao, Sun, Ke, Yao, Minli
Format: Article
Language:English
Subjects:
Algorithms
Array signal processing
beamforming
Exact solutions
Full duplex (FD)
Interference
Mathematical analysis
Mathematical models
Optimization
Physical layer
physical-layer security
Power consumption
Security
self-interference mitigation
semidefinite relaxation (SDR)
Signal to noise ratio
Wireless communication
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Summary:In this paper, we design transmit beamforming for a full duplex base station (FD-BS) considering both self-interference mitigation and physical-layer security. The proposed design is formulated as minimizing the power consumption of FD-BS under different signal-to-interference-and-noise-ratio (SINR) constraints. Semidefinite relaxation (SDR) is used to convert the initial nonconvex optimization to be a convex semidefinite programming (SDP) problem. Then the optimality of SDR is strictly proved by showing the existence of the rank-one optimal solutions. To reduce the computational complexity, we develop zero forcing beamforming-based suboptimal algorithms, where the solutions can be obtained using golden search and closed-form solutions can be derived in each step. Simulation results are then provided to verify the efficiency of the proposed algorithms.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2015.2472527