Abstract
In this paper, the physical layer security in one-way untrusted AF relay system is considered. For improving the physical layer security, external friendly jammers offer help through transmitting interference signal to the untrusted relay. It is indicated that a nonzero secrecy rate is achievable in one-way untrusted AF relay system with the help of friendly jammers. The source optimization problem is further formulated. In this optimization problem, in order to increasing the secrecy rate, the source must pay the jammers for exchanging their service of jamming. Finally, an optimal transmit power allocation of all the nodes is provided for the system. And simulation results verify the properties.
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Acknowledgement
This work was supported by the Natural Science Foundation of Jiangsu Province (Grants No. BK20161104), The Scientific Research Fund Project of JIT (2016 incentive program, jit-2016-jlxm-24), the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (16KJB510011), the Doctoral Scientific Research Foundation of JIT (jit-b-201409, jit-b-201408, jit-b-201633) and Incubation Project of Science Foundation of JIT (jit-fhxm-201605).
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Luo, R., Meng, C., Hu, G., Shi, H. (2018). Power Allocation in One-Way Untrusted AF Relay System with Friendly Jamming. In: Long, K., Leung, V., Zhang, H., Feng, Z., Li, Y., Zhang, Z. (eds) 5G for Future Wireless Networks. 5GWN 2017. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 211. Springer, Cham. https://doi.org/10.1007/978-3-319-72823-0_54
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DOI: https://doi.org/10.1007/978-3-319-72823-0_54
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