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On secure transmission in hybrid satellite‐terrestrial cooperative network with untrusted energy harvesting relay and imperfect channel estimation
Transactions on Emerging Telecommunications Technologies ( IF 2.5 ) Pub Date : 2020-12-25 , DOI: 10.1002/ett.4206 Kehinde O. Odeyemi 1, 2 , Pius A. Owolawi 1 , Oladayo O. Olakanmi 2
Transactions on Emerging Telecommunications Technologies ( IF 2.5 ) Pub Date : 2020-12-25 , DOI: 10.1002/ett.4206 Kehinde O. Odeyemi 1, 2 , Pius A. Owolawi 1 , Oladayo O. Olakanmi 2
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In this paper, the security performance of a hybrid satellite‐terrestrial cooperative network (HSTCN) with untrusted energy limited relay and imperfect channel state information (CSI) is investigated. The satellite and terrestrial links are assumed to follow Shadowed‐Rician fading and Rayleigh fading distributions respectively. The amplify‐and‐forward energy‐limited relay node employs power splitting relaying mode to scavenge energy from its received signals. By considering imperfect CSI between the relay and destination link, maximum ratio combining (MRC) and selection combining (SC) diversity schemes are utilized at the destination to enhance the quality of received signal‐to‐noise ratio (SNR) and aid jamming signal to prevent the untrusted relay from intercepting the satellite confidential data. Thus, to evaluate the HSTCN security performance, the exact analytical closed‐form expressions for the security outage probability (SOP) and connectivity outage probability (COP) are derived for each of the diversity combining techniques. Owing to trade‐off between SOP and COP, the effective secrecy throughput (EST) expression is obtained for the considered diversity schemes with a view to examine the security and reliability performance of the concerned system. Moreover, the impact of system parameters such as transmit SNR, channel coefficient, energy harvesting coefficient, and number of antennas are evaluated. In addition, the results reveal that the MRC has better SOP, COP, and EST performance compare with the SC. Also, it is found that the system EST degrades at high transmit SNR when the number of antennas at satellite is higher. The accuracy of the derived analytical expressions is confirmed by using Monte‐Carlo simulations.
中文翻译：
具有不可信能量收集中继和不完美信道估计的混合卫星-地面合作网络中的安全传输
本文研究了具有不受信任的能量限制中继和不完善的信道状态信息（CSI）的混合卫星-地面合作网络（HSTCN）的安全性能。假定卫星和地面链路分别遵循阴影理查德衰落和瑞利衰落分布。放大转发能量受限中继节点采用功率分配中继模式从其接收信号中清除能量。通过考虑中继站和目标链路之间的CSI不完美，在目标处采用了最大比率合并（MRC）和选择合并（SC）分集方案，以提高接收信噪比（SNR）的质量并帮助干扰信号。防止不受信任的中继截获卫星机密数据。因此，要评估HSTCN的安全性能，对于每种分集组合技术，都可以得出安全中断概率（SOP）和连接中断概率（COP）的精确解析封闭式表达式。由于在SOP和COP之间进行了权衡，因此为考虑的分集方案获得了有效的保密吞吐量（EST）表达式，以检查相关系统的安全性和可靠性。此外，评估了系统参数（例如发射SNR，信道系数，能量收集系数和天线数量）的影响。此外，结果表明，MRC与SC相比具有更好的SOP，COP和EST性能。而且，发现当卫星处的天线数量较高时，系统EST在高发射SNR时会劣化。
更新日期：2021-02-10
中文翻译：
具有不可信能量收集中继和不完美信道估计的混合卫星-地面合作网络中的安全传输
本文研究了具有不受信任的能量限制中继和不完善的信道状态信息（CSI）的混合卫星-地面合作网络（HSTCN）的安全性能。假定卫星和地面链路分别遵循阴影理查德衰落和瑞利衰落分布。放大转发能量受限中继节点采用功率分配中继模式从其接收信号中清除能量。通过考虑中继站和目标链路之间的CSI不完美，在目标处采用了最大比率合并（MRC）和选择合并（SC）分集方案，以提高接收信噪比（SNR）的质量并帮助干扰信号。防止不受信任的中继截获卫星机密数据。因此，要评估HSTCN的安全性能，对于每种分集组合技术，都可以得出安全中断概率（SOP）和连接中断概率（COP）的精确解析封闭式表达式。由于在SOP和COP之间进行了权衡，因此为考虑的分集方案获得了有效的保密吞吐量（EST）表达式，以检查相关系统的安全性和可靠性。此外，评估了系统参数（例如发射SNR，信道系数，能量收集系数和天线数量）的影响。此外，结果表明，MRC与SC相比具有更好的SOP，COP和EST性能。而且，发现当卫星处的天线数量较高时，系统EST在高发射SNR时会劣化。
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