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应用科学学报 >

2011 , Vol. 29 >Issue 3: 243 - 250

DOI: https://doi.org/10.3969/j.issn.0255-8297.2011.03.005

通信工程

多级中继窃听信道的可达安全速率

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  • 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
王保云，教授，博导，研究方向：无线安全通信、信号处理、信息理论，E-mail: bywang@njupt.edu.cn

收稿日期: 2010-10-23

  修回日期: 2010-12-15

  网络出版日期: 2011-05-30

基金资助

国家自然科学基金(No.60972045)；江苏省自然科学基金(No.BK1020077)资助

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Achievable Secrecy Rate of Multiple-Level Relay-Eavesdropper Channel

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  • 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

Received date: 2010-10-23

  Revised date: 2010-12-15

  Online published: 2011-05-30

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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.

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

本文引用格式

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 . DOI: 10.3969/j.issn.0255-8297.2011.03.005

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 simulation. The results show that a higher achievable secrecy rate is achieved in the multiple-level relay-eavesdropper channel when the relay node is far away from the source node. Therefore, security of the multiple-level relayeavesdropper channel is generally better.

Key words：  multiple-level; relay-eavesdropper channel; discrete memoryless channel; Gaussian channel; achievable secrecy rate; rate-equivocation

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