The optimization of secrecy rate is studied in the wireless relay-eavesdropper channel in which the nodes harvest energy.An enhanced physical layer security communication scheme is proposed based on artificial noise-aided cooperative jamming and energy cooperation.All nodes follow the save-then-transmit protocol.The nodes harvest energy first,which is then used to transmit the data.The relay is operated as an amplify-and-forward relay,and the destination sends intended jamming noise to protect information.Since the relay requires more energy,surplus energy is transferred from the destination to the relay to increase the available power of the relay.A two-step optimization algorithm to maximize the secrecy rate is derived through the optimization of the energy-saving time ratio and the jamming power allocation scaling factor.The simulation results prove that the proposed energy cooperation scheme can effectively improve secrecy rate.
雷维嘉, 江雪, 左莉杰, 谢显中. 能量收集系统中基于能量协同和协同干扰的保密传输方案[J]. 电子学报, 2017, 45(1): 67-73.
LEI Wei-jia, JIANG Xue, ZUO Li-jie, XIE Xian-zhong. A Secure Transmission Scheme for Wireless Energy Harvesting Systems via Energy Cooperation and Cooperative Jamming. Acta Electronica Sinica, 2017, 45(1): 67-73.
[1] Wyner A.The wire-tap channel[J].Bell System Technical Journal,1975,54(8):1355-1387.
[2] Cepheli O,Kurt G K.Analysis on the effects of artificial noise on physical layer security[A].Proceedings of IEEE Signal Processing and Communications Applications Conference[C].Piscataway:IEEE Press,2013.1-4.
[3] Fang D,Yang N,Elkashlan M,et al.Cooperative jamming protocols in two hop amplify-and-forward wiretap channels[A].Proceedings of 2013 IEEE International Conference on Communications[C].Piscataway:IEEE Press,2013.2188-2192.
[4] Park K H,Wang T,Alouini M S.On the jamming power allocation for secure amplify-and-forward relaying via cooperative jamming[J].IEEE Journal on Selected Areas in Communications,2013,31(9):1741-1750.
[5] 赵耀环,谢梦非,尚勇.物理层安全中的最优中继选择及协同干扰策略[J].电子学报,2015,43(4):791-794. Zhao Y H,Xie M F,Shang Y.Cooperative jamming with optimal relay selection and power allocation for physical layer security[J].Acta Electronica Sinica,2015,43(4):791-794.(in Chinese)
[6] Yin S,Zhang E,Li J,et al.Throughput optimization for self-powered wireless communications with variable energy harvesting rate[A].Proceedings of 2013 IEEE Wireless Communications and Networking Conference[C].Piscataway:IEEE Press,2013.830-835.
[7] Huang C,Zhang R,Cui S.Throughput maximization for the Gaussian relay channel with energy harvesting constraints[J].IEEE Journal on Selected Areas in Communications,2013,31(8):1469-1479.
[8] Gurakan B,Ozel O,Yang J,et al.Energy cooperation in energy harvesting two-way communications[A].Proceedings of 2013 IEEE International Conference on Communications[C].Piscataway:IEEE Press,2013.3126-3130.
[9] Zhang R,Ho C K.MIMO broadcasting for simultaneous wireless information and power transfer[J].IEEE Transactions on Wireless Communications,2013,12(5):1989-2001.
[10] Tutuncuoglu K,Yener A.Cooperative energy harvesting communications with relaying and energy sharing[A].Proceedings of IEEE Information Theory Workshop[C].Piscataway:IEEE Press:2013.1-5.
[11] Mukherjee A,Huang J.Deploying multi-antenna energy-harvesting cooperative jammers in the MIMO wiretap channel[A].Proceedings of 2012 IEEE 46h Asilomar Conference Record on Signals,Systems and Computers[C].Piscataway:IEEE Press,2012.1886-1890.
[12] Li Q,Ma W K,So A M C.Robust artificial noise-aided transmit optimization for achieving secrecy and energy harvesting[A].Proceedings of 2014 IEEE International Conference on Acoustic,Speech and Signal Processing[C].Piscataway:IEEE Press,2014.4799-2893.
[13] Xing H,Liu L,Zhang R.Secrecy wireless information and power transfer in fading wiretap channel[A].Proceedings of 2014 IEEE International Conference on Communications[C].Piscataway:IEEE Press,2014.5402-5407.
2017, Vol. 45 
