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Power Allocation and Outage Analysis for Secure MISO Cognitive Radio Networks with an Unknown Eavesdropper.

Jia, S., Zhang, J., Zhang, D., Hao, W. and Gao, F., 2020. Power Allocation and Outage Analysis for Secure MISO Cognitive Radio Networks with an Unknown Eavesdropper. IEEE Transactions on Vehicular Technology, 69 (12), 16294 - 16298.

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DOI: 10.1109/TVT.2020.3040964

Abstract

This paper investigates the power allocation problem for secure secondary transmission in a multiple-input single-output cognitive wiretap system with artificial noise (AN). The secondary transmitter exchanges confidential information with the secondary destination in the presence of an unknown eavesdropper. Since the eavesdropper's channel state information (CSI) is unavailable, we propose an optimal adaptive power allocation scheme, and derive a closed-form expression of the optimal power allocation factor that minimizes the secrecy outage probability (SOP). A suboptimal fixed power allocation scheme is also proposed to reduce the system complexity. Moreover, exact closed-form expressions of SOP under both schemes are derived. Numerical results are provided to corroborate the accuracy of our analytical results and the superiority of the proposed schemes to the benchmarks.

Item Type:Article
ISSN:0018-9545
Additional Information:© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
Uncontrolled Keywords:Physical layer security; cognitive radio; power allocation; artificial noise; secrecy outage probability
Group:Faculty of Science & Technology
ID Code:35243
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:05 Mar 2021 13:16
Last Modified:15 Aug 2021 08:28

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