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中文摘要：
针对无线网络存在安全威胁和能量受限的问题,讨论了基于ST协议的能量收集型高斯窃听信道的安全通信问题.首先,给出了ST协议的模型;其次,以最大化安全速率为目标函数,得到了最优的能量吸收速率和能量吸收比;最后,分析了系统安全速率大于零的概率和安全中断概率.仿真表明,与半能量吸收比方案相比,优化方案明显提高了系统的安全速率并降低了安全中断概率.
英文摘要：
To solve system security and energy constrained problem in wireless networks, secure communication of energy harvesting Gaussian wiretap channel based on save-then-transmit （ST） protocol was studied. Firstly, the save-then-transmit （ST） protocol was given. Next, to set the system secrecy rate as objective function, the optimal energy harvesting rate and energy harvesting ratio were derived. Finally, the outage probability and the probability that system secrecy rate was greater than zero were discussed. Numerical results show that compared with the scheme where energy harvesting ratio is half, the optimization algorithm can improve system secrecy rate and reduce outage probability.
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