| 多级中继窃听信道的可达安全速率 |
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| 引用本文： | 陈莹,王保云.多级中继窃听信道的可达安全速率[J].应用科学学报,2011,29(3):243-250. |
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| 作者姓名： | 陈莹 王保云 |
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| 作者单位： | 1. 南京邮电大学通信与信息工程学院，南京210003
2. 南京邮电大学自动化学院，南京210003
3. 北京邮电大学网络交换技术国家重点实验室，北京100876 |
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| 基金项目： | 国家自然科学基金，江苏省自然科学基金 |
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| 摘 要： | 该文研究多级中继的窃听信道的安全性能，推导了疑义速率范围及可达安全速率的表达式，并且给出高斯信道下的相应结论. 假定在功率受限的情况下，分析了高斯信道下两级中继窃听信道和单中继窃听信道的可达安全速率，仿真比较了可达安全速率的大小. 结果表明：当中继节点距离源节点较远时，布设多级中继可得到比单中继更大的安全速率，说明了多级中继窃听信道在一定意义上比单中继窃听信道的安全性能更好.
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| 关 键 词： | 多级中继 窃听信道 离散无记忆信道 高斯信道 可达安全速率 疑义速率 |
| 收稿时间： | 2010-10-23 |
| 修稿时间： | 2010-12-15 |
Achievable Secrecy Rate of Multiple-Level Relay-Eavesdropper Channel |
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| CHEN Ying,WANG Bao-yun.Achievable Secrecy Rate of Multiple-Level Relay-Eavesdropper Channel[J].Journal of Applied Sciences,2011,29(3):243-250. |
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| Authors: | CHEN Ying WANG Bao-yun |
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| Institution: | 1. College of Communication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
2. College of Automation, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
3. State Key Laboratory of Network and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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| Abstract: | Security of a multiple-level relay-eavesdropper channel is studied,and the rate-equivocation region and achievable secrecy rate are derived in a discrete memoryless channel and a Gaussian channel,respectively.In particular,we analyze the achievable secrecy rate in two-level relay-eavesdropper and one relay-eavesdropper channels in the Gaussian channel under a limited power,and compare their achievable secrecy rate by simula-tion.The results show that a higher achievable secrecy rate is achieved in the multi... |
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| Keywords: | multiple-level relay-eavesdropper channel discrete memoryless channel Gaussian channel achiev-able secrecy rate rate-equivocation |
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