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Hybrid analog-digital precoder design for securing cognitive millimeter wave networks

Hybrid analog-digital precoder design for securing cognitive millimeter wave networks
Hybrid analog-digital precoder design for securing cognitive millimeter wave networks
Millimeter wave (mmWave) communications and cognitive radio technologies constitute key technologies of improving the spectral efficiency of communications. Hence, we conceive a hybrid secure precoder for enhancing the physical layer security of a cognitive mmWave wiretap channel, where a secondary transmitter broadcasts confidential information signals to multiple secondary users under the interference temperature constraint of the primary user (PU). The optimization problem is formulated as jointly optimizing the analog and digital precoder for maximizing the minimum secrecy rate of all the secondary users under practical constraints. In particular, our design satisfies the constraint on the maximum interference power received by multiple PUs, as well as the secondary users’ minimum quality-of-service (Qos), and the unit-modulus constraint on the analog precoder. Due to the non-convexity of the resultant objective function and owing to the coupling between the analog and digital precoder, the optimization problem formulated is nonconvex and nonlinear, hence it is very challenging to solve directly. Hence, we first transform it into a tractable form, and develop a penalty dual decomposition (PDD) based iterative algorithm to locate its Karush-Kuhn-Tucker (KKT) solution. Finally, we generalize the proposed PDD algorithm to a secure hybrid precoder design relying on practical finite-resolution phase shifters and show that the proposed PDD algorithm can be straightforwardly adapted to handle the scenario, where each PU is equipped with multiple antennas and the CSI of multiple eavesdroppers (Eves) is imperfectly known. Our simulation results validate the efficiency of the proposed iterative algorithm.
1556-6013
Kong, Zhengmin
99641cb0-a364-4eb2-b838-1af3cbb297b8
Song, Jing
c3f6ccf2-4c63-487c-9c39-e25382b9ee91
Wang, Chao
90025a17-eca8-4653-8622-52404bd105ce
Chen, Hongyang
6563884c-9c74-4367-94a7-4ad1884bca26
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Kong, Zhengmin
99641cb0-a364-4eb2-b838-1af3cbb297b8
Song, Jing
c3f6ccf2-4c63-487c-9c39-e25382b9ee91
Wang, Chao
90025a17-eca8-4653-8622-52404bd105ce
Chen, Hongyang
6563884c-9c74-4367-94a7-4ad1884bca26
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Kong, Zhengmin, Song, Jing, Wang, Chao, Chen, Hongyang and Hanzo, Lajos (2020) Hybrid analog-digital precoder design for securing cognitive millimeter wave networks. IEEE Transactions on Information Forensics and Security. (doi:10.1109/TIFS.2020.3039697).

Record type: Article

Abstract

Millimeter wave (mmWave) communications and cognitive radio technologies constitute key technologies of improving the spectral efficiency of communications. Hence, we conceive a hybrid secure precoder for enhancing the physical layer security of a cognitive mmWave wiretap channel, where a secondary transmitter broadcasts confidential information signals to multiple secondary users under the interference temperature constraint of the primary user (PU). The optimization problem is formulated as jointly optimizing the analog and digital precoder for maximizing the minimum secrecy rate of all the secondary users under practical constraints. In particular, our design satisfies the constraint on the maximum interference power received by multiple PUs, as well as the secondary users’ minimum quality-of-service (Qos), and the unit-modulus constraint on the analog precoder. Due to the non-convexity of the resultant objective function and owing to the coupling between the analog and digital precoder, the optimization problem formulated is nonconvex and nonlinear, hence it is very challenging to solve directly. Hence, we first transform it into a tractable form, and develop a penalty dual decomposition (PDD) based iterative algorithm to locate its Karush-Kuhn-Tucker (KKT) solution. Finally, we generalize the proposed PDD algorithm to a secure hybrid precoder design relying on practical finite-resolution phase shifters and show that the proposed PDD algorithm can be straightforwardly adapted to handle the scenario, where each PU is equipped with multiple antennas and the CSI of multiple eavesdroppers (Eves) is imperfectly known. Our simulation results validate the efficiency of the proposed iterative algorithm.

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Hybrid Analog-Digital Precoder Design for Securing Cognitive Millimeter Wave Networks - Accepted Manuscript
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Accepted/In Press date: 20 November 2020
e-pub ahead of print date: 20 November 2020

Identifiers

Local EPrints ID: 446635
URI: http://eprints.soton.ac.uk/id/eprint/446635
ISSN: 1556-6013
PURE UUID: e7302ba9-88a5-4f1e-8815-f509954cae8d
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

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Date deposited: 16 Feb 2021 17:36
Last modified: 18 Feb 2021 16:36

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Contributors

Author: Zhengmin Kong
Author: Jing Song
Author: Chao Wang
Author: Hongyang Chen
Author: Lajos Hanzo ORCID iD

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