直达链路下的能量采集中继选择系统的吞吐量分析
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摘要
针对三节点传输系统,研究了基于功率分配能量采集的全双工放大转发协作中继方案。考虑源和目的地之间存在直达链路,全双工中继节点采用天线选择技术以最小化中继自干扰,目的节点采用最大比合并技术以最大化目的地接收信噪比。在延迟受限传输模式下,运用高斯-切比雪夫积分推出了系统吞吐量的近似闭合表达式。在延迟容忍传输模式下,运用凸优化推出了系统吞吐量下界的闭合表达式。在多中继情况下考虑了最佳中继选择策略和机会式中继选择策略。数值分析和蒙特卡洛仿真表明,增加中继个数或者减小速率阈值均能提高系统吞吐量。
According to the three-node transmission system, the amplify and forward cooperative relay scheme is investigated by combining power splitting-based energy harvesting and full-duplex technologies. Consider a direct link between the source and destination, the full-duplex relay node adopts antenna selection technology to minimize the relay self-interference, and the destination node adopts the maximum ratio combining technology to maximize the received signal-to-noise ratio at the destination. Under the delay-limited transmission mode, the approximate closed expression for systematical throughput is derived by using Gaussian-Chebyshev quadrature. Under the delay tolerant transmission mode, the closed form expression for systematical throughput lower bounded is derived by using Convex optimization. The optimal relay selection scheme and the opportunistic relay selection scheme are considered in the case of multiple relays. Numerical analysis and Monte Carlo simulations show that, the systematical throughput can be improved whether by increasing the number of relays or decreasing the rate threshold.
According to the three-node transmission system, the amplify and forward cooperative relay scheme is investigated by combining power splitting-based energy harvesting and full-duplex technologies. Consider a direct link between the source and destination, the full-duplex relay node adopts antenna selection technology to minimize the relay self-interference, and the destination node adopts the maximum ratio combining technology to maximize the received signal-to-noise ratio at the destination. Under the delay-limited transmission mode, the approximate closed expression for systematical throughput is derived by using Gaussian-Chebyshev quadrature. Under the delay tolerant transmission mode, the closed form expression for systematical throughput lower bounded is derived by using Convex optimization. The optimal relay selection scheme and the opportunistic relay selection scheme are considered in the case of multiple relays. Numerical analysis and Monte Carlo simulations show that, the systematical throughput can be improved whether by increasing the number of relays or decreasing the rate threshold.
引文
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[4] Zhao F,Wei L,Chen H.Optimal time allocation for wireless information and power transfer in wireless powered communication systems[J].IEEE Transactions on Vehicular Technology,2016,65(3):1830-1835.
[5] Ikhlef A,Bocus M Z.Outage performance analysis of relay selection in SWIPT systems[C]//WCNC 2016-2016 IEEE Wireless Communications and Networking Conference.IEEE,2016:1-5.
[6] Michalopoulos D S,Suraweera H A,Karagiannidis G K,et al.Amplify-and-forward relay selection with outdated channel estimates[J].IEEE Transactions on Communications,2012,60(5):1278-1290.
[7] 聂志巧,赵睿,方嘉佳,等.基于功率分配能量采集的全双工放大转发中继系统[J].信号处理,2017,33(4):641- 648.Nie Zhiqiao,Zhao Rui,Fang Jiajia,et al.Amplify and Forward Full Duplex Relaying Systems with Power Spitting Based Energy Harvesting[J].Journal of Signal Processing,2017,33(4):641- 648.(in Chinese)
[8] Lee H,Song C,Choi S H,et al.Outage probability analysis and power splitter designs for SWIPT relaying systems with direct link[J].IEEE Communications Letters,2017,21(3):648- 651.
[9] Li T,Fan P,Letaief K B.Outage probability of energy harvesting relay-aided cooperative networks over Rayleigh fading channel[J].IEEE Transactions on Vehicular Technology,2016,65(2):972-978.
[10] Mahama S,Asiedu D K P,Lee K J.Simultaneous wireless information and power transfer for cooperative relay networks with battery[J].IEEE Access,2017,5:13171-13178.
[11] Riihonen T,Werner S,Wichman R.Mitigation of loopback self-interference in full-duplex MIMO relays[J].IEEE Transactions on Signal Processing,2011,59(12):5983-5993.
[12] Chen G,Gong Y,Xiao P,et al.Dual Antenna Selection in Secure Cognitive Radio Networks[J].IEEE Transactions on Vehicular Technology,2016,65(20):7993- 8002.
[13] 谭星,赵睿,王聪,等.协作干扰下的非可信中继与全双工目的节点系统的遍历安全容量分析[J].信号处理,2017,33(5):734-740.Tan Xing,Zhao Rui,Wang Cong,et al.Ergodic Secrecy Capacity of Untrusted Relay and Full Duplex Destination Systems with Cooperative Jamming[J].Journal of Signal Processing,2017,33(5):734-740.(in Chinese)
[14] Gradshteyn I S,Ryzhik I M.Table of integrals,series,and products[M].Academic Press,2007.
[15] Neumaier A.Introduction to numerical analysis[M].Texts in Applied Mathematics,1974:719-720.
[16] Kalamkar S S,Banerjee A.Secure Communication via a Wireless Energy Harvesting Untrusted Relay[J].IEEE Transactions on Vehicular Technology,2017,66(3):2199-2213.
[17] Boyd S,Vandenberghe L.Convex optimization[M].Cambridge University Press,2004.
[18] Shrestha A P,Kwak K S.Secure opportunistic scheduling with transmit antenna selection[C]//PIMRC 2013-2013 IEEE 24th Annual International Symposium on Personal,Indoor,and Mobile Radio Communications.IEEE,2013:461- 465.
[19] 林鸿鑫,赵睿,贺玉成,等.过时信道状态信息下的机会式中继选择系统的安全性能分析[J].信号处理,2016,32(7):810- 818.Lin Hongxin,Zhao Rui,He Yucheng,et al.Secrecy Performance Analysis of Opportunistic Relay Selection Systems with Outdated CSI[J].Journal of Signal Processing,2016,32(7):810- 818.(in Chinese)