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| QoS-driven Power Allocation over Multicarrier Full-duplex-Relay Secure Communication System |
| MA Piming① LIANG Sui① MA Yanbo② XIONG Hailiang① YANG Yang① |
①(School of Information Science and Engineering, Shandong University, Jinan 250100, China)
②(School of Management Science and Engineering, Shandong University of Finance and Economics, Jinan 250014, China) |
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Abstract For a multicarrier full-duplex-relay secure communication system with imperfect loop-interference cancelations, an optimal power allocation strategy with the statistical delay Quality-of-Service (QoS) guarantees is proposed, by using the delay QoS constraint with the concept of the secure effective capacity. Considering the statistical delay QoS guarantees and aiming to maximize the secure effective capacity, an optimization problem is formulated with the constraints of powers of both the whole system and the loop-interference of full-duplex relay. Then, in order to study the power allocation strategy, the original optimization problem is simplified by Taylor approximation and the problem is solved based on Lagrangian dual method and Karush-Kuhn-Tucker conditions. Therefore, the optimal solution is obtained by the sub-gradient iterative algorithm and simulation results are presented. The results show that the proposed optimal power allocation strategy can not only get the largest secure effective capacity but also satisfy the upper layer delay QoS requirement.
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Received: 09 May 2016
Published: 22 January 2017
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| Fund: The National Natural Science Foundation of China (61571272, 61401253) |
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Corresponding Authors:
MA Piming
E-mail: mapiming@sdu.edu.cn
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