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
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摘要
研究节点具备能量收集能力的中继窃听信道保密速率的优化问题,提出一种基于人工噪声协同干扰和节点间能量协同的物理层安全传输策略.各节点采用储能-发送模式工作,即先收集能量,再用于数据传输.中继节点采用放大转发方式,目的节点发送人工噪声进行协同干扰.由于中继节点所需功耗较高,目的节点将用于发送干扰之外的剩余能量转移给中继节点.给出以最大化保密速率为目标函数,优化能量吸收时间比例系数和干扰功率分配因子的两步优化算法.仿真结果表明人工噪声和能量协同的引入能有效提高系统的保密传输速率.
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 followthe 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.
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 followthe 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.
引文
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[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 pow er transfer in fading w iretap channel[A].Proceedings of 2014 IEEE International Conference on Communications[C].Piscataw ay:IEEE Press,2014.5402-5407.
[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].Piscataw ay:IEEE Press,2013.1-4.
[3]Fang D,Yang N,Elkashlan M,et al.Cooperative jamming protocols in tw o hop amplify-and-forw ard w iretap channels[A].Proceedings of 2013 IEEE International Conference on Communications[C].Piscataw ay:IEEE Press,2013.2188-2192.
[4]Park K H,Wang T,Alouini M S.On the jamming power allocation for secure amplify-and-forw ard 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 w ith optimal relay selection and pow er 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-pow ered w ireless communications w ith variable energy harvesting rate[A].Proceedings of 2013 IEEE Wireless Communications and Netw orking Conference[C].Piscataw ay:IEEE Press,2013.830-835.
[7]Huang C,Zhang R,Cui S.Throughput maximization for the Gaussian relay channel w ith 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 tw o-w ay 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 w ireless information and pow er transfer[J].IEEE Transactions on Wireless Communications,2013,12(5):1989-2001.
[10]Tutuncuoglu K,Yener A.Cooperative energy harvesting communications w ith relaying and energy sharing[A].Proceedings of IEEE Information Theory Workshop[C].Piscataw ay:IEEE Press:2013.1-5.
[11]Mukherjee A,Huang J.Deploying multi-antenna energyharvesting cooperative jammers in the M IM O w iretap 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 pow er transfer in fading w iretap channel[A].Proceedings of 2014 IEEE International Conference on Communications[C].Piscataw ay:IEEE Press,2014.5402-5407.