| 能量收集高斯窃听信道的安全速率与中断性能 |
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| 引用本文： | 张秀娟,谢显中,雷维嘉.能量收集高斯窃听信道的安全速率与中断性能[J].科学技术与工程,2015,15(16). |
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| 作者姓名： | 张秀娟 谢显中 雷维嘉 |
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| 作者单位： | 重庆邮电大学个人通信研究所,重庆,400065 |
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| 基金项目： | 国家自然科学基金资助项目61271259,61301123）、重庆市自然科学基金资助项目（CTSC2011JJA40006）、重庆市教委科学技术研究资助项目（KJ120501，KJ120502，KJ130535）和长江学者和创新团队发展计划（IRT1299）和重庆市科委重点实验室专项金费资助。 |
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| 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。
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| 关 键 词： | 高斯窃听信道 ST协议 安全速率 |
| 收稿时间： | 2015/1/27 0:00:00 |
| 修稿时间： | 2015/1/27 0:00:00 |
Secrecy rate and outage performance for energy harvesting Gaussian wiretap channel |
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| ZHANG Xiu-Juan,XIE Xian-Zhong and LEI Wei-Jia.Secrecy rate and outage performance for energy harvesting Gaussian wiretap channel[J].Science Technology and Engineering,2015,15(16). |
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| Authors: | ZHANG Xiu-Juan XIE Xian-Zhong and LEI Wei-Jia |
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| Institution: | Institute of Personal Communications,Chongqing University of Posts and Telecommunications,Institute of Personal Communications,Chongqing University of Posts and Telecommunications |
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| Abstract: | 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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| Keywords: | Gaussian wiretap channel ST protocol secrecy rate |
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