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Secure communications for dual-polarized MIMO systems

Secure communications for dual-polarized MIMO systems
Secure communications for dual-polarized MIMO systems
To enhance secure communications, we deploy the dual-polarized antenna arrays at communication nodes of the multi-input multioutput (MIMO) system, where the base station communicates with multiple legitimate users in the presence of an eavesdropper. We also adopt the dual-structured precoding in which a preprocessing matrix based on the polarized array spatial correlation and a linear precoding based on the instantaneous channel state information (CSI) are concatenated. We design this dual-structured multiuser linear precoding under three cases. In the first case, given perfect global CSI, the secrecy rate optimization problem is formulated and transformed into the weighted minimum mean square error (MSE) problem, which can be effectively solved by the block coordinate decent method. In the second case, where the eavesdropper’s CSI is unavailable, an artificial noise is generated to confuse the eavesdropper by minimizing the information transmit power subject to a preset MSE threshold for the recovered confidential signals, which can be solved by an efficient
iterative algorithm. In the third case of imperfect global CSI, the robust optimization for secure communications is performed by minimizing the largest received MSE among the users subject to the total transmit power constraint, which can be reformulated into a biconvex semidefinite programming problem and solved by an efficient alternating convex optimization. Simulation results are ncluded to demonstrate the excellent performance of our proposed designs over the conventional single-polarized array-based designs, in terms of achievable secrecy rate, minimum transmit power, and
the MSE of recovered confidential signals.
1053-587X
4177-4192
Gong, Shiqi
56c61a3c-ffb4-4f08-a817-9cd4d073c6ad
Xing, Chengwen
25b9b573-243b-49e1-aac6-229b8614f0dc
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Fei, Zesong
1523e506-ebec-420d-b491-da48dff3fb2c
Gong, Shiqi
56c61a3c-ffb4-4f08-a817-9cd4d073c6ad
Xing, Chengwen
25b9b573-243b-49e1-aac6-229b8614f0dc
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Fei, Zesong
1523e506-ebec-420d-b491-da48dff3fb2c

Gong, Shiqi, Xing, Chengwen, Chen, Sheng and Fei, Zesong (2017) Secure communications for dual-polarized MIMO systems. IEEE Transactions on Signal Processing, 65 (16), 4177-4192. (doi:10.1109/TSP.2017.2706180).

Record type: Article

Abstract

To enhance secure communications, we deploy the dual-polarized antenna arrays at communication nodes of the multi-input multioutput (MIMO) system, where the base station communicates with multiple legitimate users in the presence of an eavesdropper. We also adopt the dual-structured precoding in which a preprocessing matrix based on the polarized array spatial correlation and a linear precoding based on the instantaneous channel state information (CSI) are concatenated. We design this dual-structured multiuser linear precoding under three cases. In the first case, given perfect global CSI, the secrecy rate optimization problem is formulated and transformed into the weighted minimum mean square error (MSE) problem, which can be effectively solved by the block coordinate decent method. In the second case, where the eavesdropper’s CSI is unavailable, an artificial noise is generated to confuse the eavesdropper by minimizing the information transmit power subject to a preset MSE threshold for the recovered confidential signals, which can be solved by an efficient
iterative algorithm. In the third case of imperfect global CSI, the robust optimization for secure communications is performed by minimizing the largest received MSE among the users subject to the total transmit power constraint, which can be reformulated into a biconvex semidefinite programming problem and solved by an efficient alternating convex optimization. Simulation results are ncluded to demonstrate the excellent performance of our proposed designs over the conventional single-polarized array-based designs, in terms of achievable secrecy rate, minimum transmit power, and
the MSE of recovered confidential signals.

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Accepted/In Press date: 10 May 2017
e-pub ahead of print date: 18 May 2017
Published date: 15 August 2017
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 411414
URI: http://eprints.soton.ac.uk/id/eprint/411414
ISSN: 1053-587X
PURE UUID: fad16eec-b806-4f1a-b134-275dd75af3fa

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Date deposited: 20 Jun 2017 16:31
Last modified: 06 Oct 2020 19:38

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Contributors

Author: Shiqi Gong
Author: Chengwen Xing
Author: Sheng Chen
Author: Zesong Fei

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